Mirrors

‌SPECIFICATIONS

FASTENER SPECIFICATIONS

ACCESSORIES & EQUIPMENT

Mirrors - Volt

Reusable Threaded Fastener Tightening Specifications

NOTE: All fasteners listed in this table can be reused after removal.
Application	Specification
Application	Metric (English)
Inside Rearview Mirror Screw	1.8 N.m (16 lb in)
Outside Rearview Mirror Bolt	10 N.m (89 lb in)
Outside Rearview Mirror Inner Actuator Fastener	0.8 N.m (71 lb in)

ADHESIVES, FLUIDS, LUBRICANTS, AND SEALERS

Application

Type of Material

GM Part Number

United States

Canada

Inside Mirror Adhesive Kit

Adhesive

89021329

89020893

SCHEMATIC WIRING DIAGRAMS

INSIDE REARVIEW MIRROR WIRING SCHEMATICS

Inside Rearview Mirror (DD8)

Fig. 1: Inside Rearview Mirror (DD8)

Courtesy of GENERAL MOTORS COMPANY

OUTSIDE REARVIEW MIRROR WIRING SCHEMATICS

Directional Controls and Motors

Fig. 2: Directional Controls and Motors Courtesy of GENERAL MOTORS COMPANY

Mirror Heaters (DLW)

Fig. 3: Mirror Heaters (DLW)

Courtesy of GENERAL MOTORS COMPANY

DIAGNOSTIC INFORMATION AND PROCEDURES

SYMPTOMS - MIRRORS

NOTE: The following steps must be completed before using the symptom tables.

1. Perform the Diagnostic System Check - Vehicle before using the Symptom Tables in order to verify that all of the following are true:

There are no DTCs set.

The control modules can communicate via the serial data link.

2. Review the system operation in order to familiarize yourself with the system functions. Refer to Outside Mirror Description and Operation, and Automatic Day-Night Mirror Description and Operation.

Visual/Physical Inspection

Inspect for aftermarket devices which could affect the operation of the system. Refer to Checking Aftermarket Accessories .

Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

Heated Mirrors Malfunction Power Mirror Malfunction

Automatic Day-Night Mirrors Malfunction

HEATED MIRRORS MALFUNCTION

Diagnostic Instructions

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Review Strategy Based Diagnosis for an overview of the diagnostic approach.

Refer to Diagnostic Procedure Instructions to provide an overview of each diagnostic category.

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Relay B+	-	2	-	-
Relay Control	B0283 02	B0283 05	B0283 05	-
Relay Ground	-	B0283 05	-	-
Left Heated Mirror Element Control	2	1	3	-
Driver Outside Rearview Mirror Ground	-	1	-	-
Right Heated Mirror Element Control	2	1	3	-
Passenger Outside Rearview Mirror Ground	-	1	-	-
1. Single Heated Mirror Inoperative 2. Both Heated Mirrors Inoperative 3. Heated Mirrors Always On

Circuit/System Description

The outside rearview mirror heater relay supplies voltage to the outside rearview mirror heater elements based on the current state of the rear window defogger. The relay supplies B+ through the driver/passenger mirror heating element control circuit when a request is seen.

Reference Information

Schematic Reference

Outside Rearview Mirror Schematics

Defogger Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Outside Mirror Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information.

Circuit/System Verification

1. Vehicle in Service Mode.

2. Verify the E18 Rear Defogger Grid turns ON and OFF when commanding the Rear Defogger On and Off with a scan tool.

If the E18 Rear Defogger Grid does not turn ON or OFF

Refer to Rear Window Defogger Malfunction .

If the E18 Rear Defogger Grid turns ON and OFF

3. Verify the mirror glass of the A9A Outside Rearview Mirror-Driver and the A9B Outside Rearview Mirror-Passenger become warm when commanding the Rear Defogger On with a scan tool.

If the mirror glass of the A9A Outside Rearview Mirror-Driver and the A9B Outside Rearview Mirror-Passenger do not become warm

Refer to Circuit/System Testing.

If the mirror glass of the A9A Outside Rearview Mirror-Driver and the A9B Outside Rearview Mirror-Passenger become warm

4. All OK.

Circuit/System Testing

1. Vehicle OFF and all vehicle systems OFF, disconnect the harness connector at the appropriate A9 Outside Rearview Mirror. It may take up to 2 minutes for all vehicle systems to power down.

2. Test for less than 10 Ω between the ground circuit terminal 7 and ground.

If 10 Ω or greater

1. Vehicle OFF.

2. Test for less than 2 Ω in the ground circuit end to end.

If 2 Ω or greater, repair the open/high resistance in the circuit.

If less than 2 Ω, repair the open/high resistance in the ground connection.

If less than 10 Ω

3. Vehicle in Service Mode, connect a test lamp between the control circuit terminal 1 and the ground circuit terminal 7.

4. Verify the test lamp turns ON and OFF when commanding the Rear Defogger On and Off with a scan tool.

If the test lamp is always OFF

1. Vehicle OFF, remove the test lamp, disconnect the harness connector at the X50A Fuse Block- Underhood.

2. Test for infinite resistance between the control circuit and ground.

If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance

3. Test for less than 2 Ω in the control circuit end to end.

If 2 Ω or greater, repair the open/high resistance in the circuit. If less than 2 Ω, replace the A9 Outside Rearview Mirror.

If the test lamp is always ON

1. Vehicle OFF, remove the test lamp, disconnect the harness connector at the X50A Fuse Block- Underhood, Vehicle in Service Mode.

2. Test for less than 1 V between the control circuit and ground.

If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the X50A Fuse Block-Underhood

If the test lamp turns ON and OFF

5. Test or replace the A9 Outside Rearview Mirror.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Refer to Outside Rearview Mirror Glass Replacement

Refer to Fuse Block Replacement

Refer to Control Module References for control module replacement, programming and setup

AUTOMATIC DAY-NIGHT MIRRORS MALFUNCTION

Diagnostic Instructions

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Review Strategy Based Diagnosis for an overview of the diagnostic approach

Refer to Diagnostic Procedure Instructions to provide an overview of each diagnostic category

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
B+	1	1	-	-
Backup Lamp Signal	B2545 02	2	2	-
Ground	-	1	-	-
1. Automatic Mirror Dimming Inoperative 2. Mirror Automatic Day-Night Disable Feature Malfunction

Circuit/System Description

The inside rearview mirror uses 2 photocell sensors. One sensor is the rear light sensor, located on the face side of the mirror, facing the rear of the vehicle. The rear light sensor is used to determine light conditions present at the mirror face. The other sensor is the front light sensor, located on the backside of the mirror, facing the front of the vehicle. The front light sensor is used to determine the exterior light conditions at the front of the vehicle. With a low exterior light condition detected by the front light sensor and a high light condition from the rear light sensor, the inside rearview mirror will automatically darken the face of the inside rearview mirror.

With the gear selector lever in the REVERSE position, backup lamp control voltage is supplied as an input to the inside rearview mirror. The mirror monitors this input to disable the automatic day-night feature. This allows the driver to see objects in the mirror clearly when backing up, regardless of the rear light sensor status.

Reference Information

Schematic Reference

Inside Rearview Mirror Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Automatic Day-Night Mirror Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Vehicle ON.

2. Cover the rear window with a blanket or other suitable item.

3. Verify the A10 Inside Rearview Mirror face dims when shining a bright light into the rear light sensor

If the A10 Inside Rearview Mirror does not dim

Refer to Circuit/System Testing - Inside Review Mirror Dimming Inoperative

If the A10 Inside Rearview Mirror dims

4. Verify the A10 Inside Rearview Mirror face transitions from dim to bright while commanding the Backup Lamps Active and Inactive with a scan tool.

If the A10 Inside Rearview Mirror does not transition between dim and bright.

Refer to Circuit/System Testing - Day-Night Disable Malfunction

If the A10 Inside Rearview Mirror transitions between bright and dim states

5. All OK.

Circuit/System Testing

Inside Review Mirror Dimming Inoperative

1. Vehicle OFF, disconnect the harness connector at the A10 Inside Rearview Mirror. It may take up to 2 minutes for all vehicle systems to power down.

2. Test for less than 10 Ω between the ground circuit terminal 5 and ground.

If 10 Ω or greater

1. Vehicle OFF.

2. Test for less than 2 Ω in the ground circuit end to end.

If 2 Ω or greater, repair the open/high resistance in the circuit.

If less than 2 Ω, repair the open/high resistance in the ground connection.

If less than 10 Ω

3. Vehicle in Service Mode.

4. Verify a test lamp illuminates between the B+ circuit terminal 2 and ground.

If the test lamp does not illuminate and the circuit fuse is good

1. Vehicle OFF.

2. Test for less than 2 Ω in the B+ circuit end to end.

If 2 Ω or greater, repair the open/high resistance in the circuit.

If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.

If the test lamp does not illuminate and the circuit fuse is open

1. Vehicle OFF.

2. Test for infinite resistance between the B+ circuit and ground.

If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the A10 Inside Rearview Mirror.

If the test lamp illuminates

5. Replace the A10 Inside Rearview Mirror.

Day-Night Disable Malfunction

1. Vehicle OFF, disconnect the harness connector at the A10 Inside Rearview Mirror.

2. Connect a test lamp between the control circuit terminal 1 and ground

3. Vehicle in Service Mode, verify the test lamp turns ON and OFF while commanding the Backup Lamps Active and Inactive with a scan tool.

If the test lamp is always OFF

1. Vehicle OFF, remove the test lamp, disconnect the harness connector at the K9 Body Control Module.

2. Test for infinite resistance between the control circuit and ground.

If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance

3. Test for less than 2 Ω in the control circuit end to end.

If 2 Ω or greater, repair the open/high resistance in the circuit. If less than 2 Ω, refer to Backup Lamps Malfunction .

If the test lamp is always ON

1. Vehicle OFF, remove the test lamp, disconnect the harness connector at the K9 Body Control Module, Vehicle in Service Mode.

2. Test for less than 1 V between the control circuit and ground.

If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, refer to Backup Lamps Malfunction

If the test lamp turns ON and OFF

4. Replace the A10 Inside Rearview Mirror.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair. Refer to Inside Rearview Mirror Replacement

POWER MIRROR MALFUNCTION

Diagnostic Instructions

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Review Strategy Based Diagnosis for an overview of the diagnostic approach.

Refer to Diagnostic Procedure Instructions to provide an overview of each diagnostic category.

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Outside Rearview Mirror Switch

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
B+
Driver Mirror Motor Horizontal Control	1	2	2	-
Driver Mirror Motor Vertical Control	1	2	2	-
Passenger Mirror Motor Horizontal Control	1	3	3	-
Passenger Mirror Motor Vertical Control	1	3	3	-
Outside Rearview Mirror Switch Ground	-	1	-	-
1. Both Outside Power Mirrors Inoperative 2. Driver Outside Power Mirror Malfunction 3. Passenger Outside Power Mirror Malfunction

Circuit/System Description

The outside rearview mirror switch controls the outside rearview mirrors based on the position of the mirror selector switch and which movement position is selected. The outside rearview mirror switch has four positions: up, down, left, and right. B+ is applied to the switch from the power mirror fuse and when a movement position switch is selected, voltage is sent to the commanded mirror via a mirror control circuit. The opposite mirror control circuit acts as a ground circuit for the bi-directional mirror motor. Ground is the applied through the switch.

Reference Information

Schematic Reference

Outside Rearview Mirror Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Outside Mirror Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Circuit/System Verification

1. Vehicle in Service Mode.

2. Verify the mirror glass of the A9A Outside Rearview Mirror-Driver and the A9B Outside Rearview Mirror-Passenger move UP, DOWN, LEFT and RIGHT with the S146 Window/Outside Rearview Mirror Switch-Driver.

If both outside mirror glasses do not move

Refer to Circuit/System Testing - Both Outside Rearview Mirrors Inoperative.

If the driver outside mirror glass does not move UP, DOWN, LEFT or RIGHT

Refer to Circuit/System Testing - Driver Outside Mirror Movement Malfunction.

If the passenger outside mirror glass does not move UP, DOWN, LEFT or RIGHT

Refer to Circuit/System Testing - Passenger Outside Mirror Movement Malfunction.

If the mirror glass of the A9A Outside Rearview Mirror-Driver and the A9B Outside Rearview Mirror-Passenger move UP, DOWN, LEFT and RIGHT

3. All OK.

Circuit/System Testing

Both Outside Rearview Mirrors Inoperative

1. Vehicle OFF, disconnect the harness connector at the S146 Window/Outside Rearview Mirror Switch- Driver. It may take up to 2 minutes for all vehicle systems to power down.

2. Test for less than 10 Ω between the ground circuit terminal 24 and ground.

If 10 Ω or greater

1. Vehicle OFF.

2. Test for less than 2 Ω in the ground circuit end to end.

If 2 Ω or greater, repair the open/high resistance in the circuit.

If less than 2 Ω, repair the open/high resistance in the ground connection.

If less than 10 Ω

3. Verify a test lamp illuminates between the B+ circuit terminal 23 and ground.

If the test lamp does not illuminate and the circuit fuse is good

1. Vehicle OFF.

2. Test for less than 2 Ω in the B+ circuit end to end.

If 2 Ω or greater, repair the open/high resistance in the circuit.

If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.

If the test lamp does not illuminate and the circuit fuse is open

1. Vehicle OFF.

2. Test for infinite resistance between the B+ circuit and ground.

If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance

3. Test for infinite resistance between each of the control circuit terminals listed below and ground: Control circuit terminal 2

Control circuit terminal 3 Control circuit terminal 4 Control circuit terminal 6 Control circuit terminal 7 Control circuit terminal 8

If less than infinite resistance, repair the short to ground on the circuit.

If infinite resistance, replace the S146 Window/Outside Rearview Mirror Switch-Driver.

If the test lamp illuminates

4. Test or replace the S146 Window/Outside Rearview Mirror Switch-Driver.

Driver Outside Mirror Movement Malfunction

1. Vehicle OFF, disconnect the harness connector at the M77D Outside Rearview Mirror Motor-Driver. Vehicle in Service Mode

2. Connect a test lamp between the control circuit terminal 2 and control circuit terminal 3.

3. Verify the test lamp turns ON when commanding the UP and DOWN states with the S146 Window/Outside Rearview Mirror Switch-Driver.

If the test lamp remains OFF during either of the commands

1. Vehicle OFF, remove the test lamp, disconnect the harness connector at the S146 Window/Outside Rearview Mirror Switch-Driver.

2. Test for infinite resistance between each control circuit and ground.

If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance

3. Test for less than 2 Ω in each control circuit end to end.

If 2 Ω or greater, repair the open/high resistance in the circuit.

If less than 2 Ω, test or replace the S146 Window/Outside Rearview Mirror Switch-Driver.

If the test lamp is always ON

1. Vehicle OFF, remove the test lamp, disconnect the harness connector at the S146 Window/Outside Rearview Mirror Switch-Driver, Vehicle in Service Mode.

2. Test for less than 1 V between each control circuit and ground. If 1 V or greater, repair the short to voltage on the circuit.

If less than 1 V, test or replace the S146 Window/Outside Rearview Mirror Switch-Driver

If the test lamp turns ON during each of the commands

4. Connect a test lamp between the control circuit terminal 1 and control circuit terminal 2.

5. Verify the test lamp turns ON when commanding the LEFT and RIGHT states with the S146 Window/Outside Rearview Mirror Switch-Driver.

If the test lamp remains OFF during either of the commands

1. Vehicle OFF, remove the test lamp, disconnect the harness connector at the S146 Window/Outside

Rearview Mirror Switch-Driver.

2. Test for infinite resistance between each control circuit and ground.

If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance

3. Test for less than 2 Ω in each control circuit end to end.

If 2 Ω or greater, repair the open/high resistance in the circuit.

If less than 2 Ω, test or replace the S146 Window/Outside Rearview Mirror Switch-Driver.

If the test lamp is always ON

1. Vehicle OFF, remove the test lamp, disconnect the harness connector at the S146 Window/Outside Rearview Mirror Switch-Driver, Vehicle in Service Mode.

2. Test for less than 1 V between each control circuit and ground. If 1 V or greater, repair the short to voltage on the circuit.

If less than 1 V, test or replace the S146 Window/Outside Rearview Mirror Switch-Driver

If the test lamp turns ON during each of the commands

6. Test or replace the M77D Outside Rearview Mirror Motor-Driver.

Passenger Outside Mirror Movement Malfunction

1. Vehicle OFF, disconnect the harness connector at the M77P Outside Rearview Mirror Motor-Passenger. Vehicle in Service Mode

2. Connect a test lamp between the control circuit terminal 2 and control circuit terminal 3.

3. Verify the test lamp turns ON when commanding the UP and DOWN states with the S146 Window/Outside Rearview Mirror Switch-Driver.

If the test lamp remains OFF during either of the commands

1. Vehicle OFF, remove the test lamp, disconnect the harness connector at the S146 Window/Outside Rearview Mirror Switch-Driver.

2. Test for infinite resistance between each control circuit and ground.

If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance

3. Test for less than 2 Ω in each control circuit end to end.

If 2 Ω or greater, repair the open/high resistance in the circuit.

If less than 2 Ω, test or replace the S146 Window/Outside Rearview Mirror Switch-Driver.

If the test lamp is always ON

1. Vehicle OFF, remove the test lamp, disconnect the harness connector at the S146 Window/Outside Rearview Mirror Switch-Driver, Vehicle in Service Mode.

2. Test for less than 1 V between each control circuit and ground. If 1 V or greater, repair the short to voltage on the circuit.

If less than 1 V, test or replace the S146 Window/Outside Rearview Mirror Switch-Driver

If the test lamp turns ON during each of the commands

4. Connect a test lamp between the control circuit terminal 1 and control circuit terminal 2.

5. Verify the test lamp turns ON when commanding the LEFT and RIGHT states with the S146 Window/Outside Rearview Mirror Switch-Driver.

If the test lamp remains OFF during either of the commands

1. Vehicle OFF, remove the test lamp, disconnect the harness connector at the S146 Window/Outside Rearview Mirror Switch-Driver.

2. Test for infinite resistance between each control circuit and ground.

If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance

3. Test for less than 2 Ω in each control circuit end to end.

If 2 Ω or greater, repair the open/high resistance in the circuit.

If less than 2 Ω, test or replace the S146 Window/Outside Rearview Mirror Switch-Driver.

If the test lamp is always ON

1. Vehicle OFF, remove the test lamp, disconnect the harness connector at the S146 Window/Outside Rearview Mirror Switch-Driver, Vehicle in Service Mode.

2. Test for less than 1 V between each control circuit and ground. If 1 V or greater, repair the short to voltage on the circuit.

If less than 1 V, test or replace the S146 Window/Outside Rearview Mirror Switch-Driver

If the test lamp turns ON during each of the commands

6. Test or replace the M77P Outside Rearview Mirror Motor-Passenger.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair. Refer to Front Side Door Window Control Switch Replacement

Refer to Front Side Door Window Switch Replacement (Right Side)

Refer to Rear Side Door Window Switch Replacement

REPAIR INSTRUCTIONS

OUTSIDE REARVIEW MIRROR REPLACEMENT

Fig. 4: Outside Rearview Mirror

Courtesy of GENERAL MOTORS COMPANY

Callout

Component Name

WARNING:

Refer to Glass and Sheet Metal Handling Warning .

Preliminary Procedure

Remove Front Side Door Window Garnish Molding. Refer to Front Side Door Window Garnish Molding Replacement

Remove Front Side Door Window Upper Reveal Molding. Refer to Front Side Door Window Upper Reveal Molding Replacement

Plug

Procedure

Remove the plug that covers the lower front mirror bolt.

Outside Rearview Mirror Bolt (Qty: 3)

CAUTION:

Callout

Component Name

Refer to Fastener Caution .

Procedure

Disconnect the electrical connector.

Tighten

10 N.m (89 lb in)

Outside Rearview Mirror

Procedure

Lift bottom of mirror and pull mirror out from under the weatherstrip.

NOTE:

Inspect the outside rearview mirror for proper operation before installing the front side door window garnish molding.

OUTSIDE REARVIEW MIRROR GASKET REPLACEMENT

Fig. 5: Outside Rearview Mirror Gasket Courtesy of GENERAL MOTORS COMPANY

Callout

Component Name

Preliminary Procedure

Remove Outside Rearview Mirror. Refer to Outside Rearview Mirror Replacement

Outside Rearview Mirror Gasket

NOTE:

Inspect the mirror and window for proper operation before install the trim panel.

OUTSIDE REARVIEW MIRROR HOUSING UPPER COVER REPLACEMENT

Fig. 6: Outside Rearview Mirror Housing Upper Cover Courtesy of GENERAL MOTORS COMPANY

Callout

Component Name

Preliminary Procedure

Remove Outside Rearview Mirror Glass. Refer to Outside Rearview Mirror Glass Replacement

Outside Rearview Mirror Upper Housing Cover

Procedure

Using the appropriate tool, release the outside rearview mirror upper housing cover.

OUTSIDE REARVIEW MIRROR INNER ACTUATOR REPLACEMENT

Fig. 7: Outside Rearview Mirror Inner Actuator Courtesy of GENERAL MOTORS COMPANY

Callout	Component Name
Preliminary Procedure Remove Outside Rearview Mirror Glass. Refer to Outside Rearview Mirror Glass Replacement
1	Outside Rearview Mirror Inner Actuator Fastener (Qty: 3) CAUTION: Refer to Fastener Caution . Procedure Disconnect the electrical connector. Tighten 0.8 N.m (7 lb in)
2	Outside Rearview Mirror Inner Actuator

OUTSIDE REARVIEW MIRROR GLASS REPLACEMENT

Fig. 8: Outside Rearview Mirror Glass Courtesy of GENERAL MOTORS COMPANY

Callout

Component Name

Outside Rearview Mirror Glass

WARNING:

Approved safety glasses and gloves should be worn when performing this procedure to reduce the chance of personal injury.

Procedure

1. Place masking tape over the mirror glass.

2. Carefully push the outside rearview mirror glass upward and into the inside corner of the mirror housing, allowing access to the bottom edge.

Callout

Component Name

3. Grasp the bottom edge of the mirror glass firmly, lift it up and pull rearward until the mirror glass retainers release the actuator motor ring.

4. Disconnect all electrical connectors.

5. Place the mirror glass in line with the inner actuator retainers.

6. Place one hand on the back of the mirror housing, using the flat palm of the other hand press inward locking the mirror glass retainers to the inner actuator ring.

7. Remove the masking tape from the mirror glass.

INSIDE REARVIEW MIRROR REPLACEMENT

Fig. 9: Inside Rearview Mirror

Courtesy of GENERAL MOTORS COMPANY

Callout

Component Name

Preliminary Procedure

Remove Windshield Multifunction Sensor Mount Bracket Lower Cover. Refer to Windshield Multifunction Sensor Mount Bracket Lower Cover Replacement

Inside Rearview Mirror Screw

CAUTION:

Refer to Fastener Caution .

Callout

Component Name

Procedure

1. Adjust the mirror to the full upward position.

2. Loosen the set screw located at the base of the mirror.

3. Slide the mirror upward off of the rearview mirror button.

Tighten

1.8 N.m (16 lb in)

Inside Rearview Mirror

DESCRIPTION AND OPERATION

AUTOMATIC DAY-NIGHT MIRROR DESCRIPTION AND OPERATION

Inside Rearview Mirror with the Automatic Day-Night Feature System Operation

The inside rearview mirror uses 2 photocell sensors. One sensor is the headlight sensor, located on the face side of the mirror. The headlight sensor is used to determine light conditions present at the mirror face. The other sensor is the ambient light sensor, located on the rear of the mirror or windshield side. The ambient light sensor is used to determine the exterior light conditions. With a low exterior light condition detected, and a high light condition from behind of the car, at the headlight sensor, the inside rearview mirror will automatically darken the face of the mirror.

In the daytime, the mirror is in a normal state because of the high exterior light condition that is indicated by the ambient light sensor. With the gear selector lever in the REVERSE position, backup lamp supply voltage is supplied as an input to the inside rearview mirror. The mirror monitors this input to disable the automatic day- night feature. This allows the driver to see objects in the mirror clearly when backing up, even during the night.

OUTSIDE MIRROR DESCRIPTION AND OPERATION

Power Mirror System Components

The power mirror system consists of the following components: Outside rearview mirror switch

Mirror selector switch

Driver outside rearview mirror

Passenger outside rearview mirror

Each of the outside rearview mirror contains two motors. The vertical motor operates the mirror in the up and down directions, and the horizontal motor operates the mirror in the left and right directions.

Fig. 10: Power Mirror System Block Diagram (Without A45) Courtesy of GENERAL MOTORS COMPANY

Callout	Component Name
S52	S52 Outside Rearview Mirror Switch
A9A	A9A Outside Rearview Mirror - Driver
A9B	A9B Outside Rearview Mirror - Passenger

Power Mirror System Controls

The outside rearview mirror switch is a four position directional switch: Up, Down, Left and Right. The mirror select switch is a three position switch: left, neutral/fold, and right.

Power Mirror System Operation

The outside rearview mirror switch receives battery voltage from the underhood fuse block The power mirror switch also receives a constant ground.

The four positions of the direction switch have dual switch contacts. Each of the contacts are connected to opposing sides of the appropriate power mirror motors through the selector switch. The selector switch completes these circuits depending on the position of the selector switch, L or R.

If the selector switch is placed in the L position and the up switch is pressed, battery voltage will be supplied to the left outside rearview mirror vertical motor through the left mirror motor vertical control circuit and ground through the left mirror motor common control circuit. If the down switch is pressed, battery voltage will be supplied to the left outside rearview mirror vertical motor through the left mirror motor common control circuit

and ground through the left mirror motor vertical control circuit.

The remainder of the mirror functions operate in the same manner as described above. Placing the power mirror switch in opposing positions, left/right or up/down, will reverse the polarity to the mirror motor, reversing the direction of movement.

Heated Mirrors (If Equipped)

The heated mirrors are controlled through the rear defog relay. Whenever the rear window defogger is turned on battery voltage is supplied to the mirror heater elements through the left and right mirror heater element control circuits.

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