Mirror System Chevrolet Express G3500

Fastener Tightening Specifications

Fastener Tightening Specifications

Scheme 1

Scheme 2

Symptoms - Mirrors

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

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/express-g3500/2013-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) 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»(/chevrolet/express-g3500/2013-2013/remont/mirrors/#mirror-system) .

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the system. Refer to «Checking Aftermarket Accessories»(/chevrolet/express-g3500/2013-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__checking-aftermarket-accessories) .
2. 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

1. «Heated Mirrors Malfunction»(/chevrolet/express-g3500/2013-2013/remont/mirrors/#mirror-system)
2. «Power Mirror Malfunction»(/chevrolet/express-g3500/2013-2013/remont/mirrors/#mirror-system)

Diagnostic Instructions

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/express-g3500/2013-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/express-g3500/2013-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/express-g3500/2013-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Diagnostic Fault Information

Circuit/System Description

The REAR DEFOG 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 circuits when a request is seen.

Reference Information

Schematic Reference

Outside Rearview Mirror Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Outside Mirror Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/express-g3500/2013-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/chevrolet/express-g3500/2013-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/express-g3500/2013-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
4. «Wiring Repairs»(/chevrolet/express-g3500/2013-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON, press the rear window defogger switch. Verify the rear window defogger turns ON and the rear window becomes warm. If the rear window defogger does not turn on, refer to «Rear Window Defogger Malfunction»(/chevrolet/express-g3500/2013-2013/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) .
2. Verify both the left and right outside mirror glass become warm.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate outside rearview mirror.
2. Test for less than 10 ohms between the ground circuit terminal A and ground. If greater than the specified range, test the low reference circuit for an open/high resistance.
3. Connect a test lamp between the heater element control circuit terminal C and ground.
4. Ignition ON, operate the rear window defogger ON and OFF with the rear defogger switch. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance.
5. If all circuits test normal, test or replace the outside rearview mirror glass.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Outside Rearview Mirror Glass Replacement (Base Level)

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/express-g3500/2013-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/express-g3500/2013-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/express-g3500/2013-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The outside rearview mirror switch supplies both voltage and ground to the outside rearview mirror motors. When the outside rearview mirror switch is being pressed the switch supplies the voltage and ground to the proper circuits to engage the proper mirror motor.

Schematic Reference

Outside Rearview Mirror Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Outside Mirror Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/express-g3500/2013-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/chevrolet/express-g3500/2013-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/express-g3500/2013-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
4. «Wiring Repairs»(/chevrolet/express-g3500/2013-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON, with the mirror selector switch in the DRIVER position, command the mirrors UP, DOWN, LEFT, and RIGHT using the mirror directional switch. The driver mirror should move in the commanded direction.
2. Ignition ON, with the mirror selector switch in the PASSENGER position, command the mirrors UP, DOWN, LEFT, and RIGHT using the mirror directional switch. The passenger mirror should move in the commanded direction.

1. Ignition OFF, disconnect the harness connector at the power mirror switch.
2. Test for less than 10 ohms between the ground circuit terminal D and ground. If greater than the specified range, test the low reference circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal E and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the B+ circuit fuse is open, test the control circuits for a short to ground.
4. Connect the harness connector at the outside rearview mirror switch.
5. Disconnect the harness connector at the appropriate power mirror.
6. Connect a test lamp between the control circuit terminal F and the control circuit terminal E.
7. Operate the vertical switch UP and DOWN. The test lamp should turn ON when commanding the UP and DOWN states. If the test lamp remains OFF during either of the commands, test for a short to voltage, short to ground or an open/high resistance on the control circuits. If the circuits test normal, replace the power mirror switch.
8. Connect a test lamp between the control circuit terminal G and the control circuit terminal H.
9. Operate the horizontal switch LEFT and RIGHT. The test lamp should turn ON when commanding the LEFT and RIGHT states. If the test lamp remains OFF during either of the commands, test for a short to voltage, short to ground or an open/high resistance on the control circuits. If the circuits test normal, replace the power mirror switch.
10. If all circuits test normal, test or replace the power mirror.

Component Testing

Outside Rearview Mirror Switch

1. Ignition OFF, disconnect the harness connector at the outside rearview mirror switch.
2. Test for infinite resistance between all of the control circuit terminals and the B+ and ground circuit terminals with the switch in the open position. If less than the specified range, replace the power mirror switch.
3. Test for less than 1 ohms between all of the control terminals and ground terminal with the outside rearview mirror switch in the proper positions. If greater than the specified range, test the ground circuit for an open/high resistance. If the circuits test normal, replace the power mirror switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Power Mirror Replacement»(/chevrolet/express-g3500/2013-2013/remont/mirrors/#mirror-system)
2. «Power Mirror Switch Replacement»(/chevrolet/express-g3500/2013-2013/remont/mirrors/#mirror-system)

Removal Procedure

1. Remove the front door garnish molding. Refer to «Front Side Door Front Garnish Molding Replacement»(/chevrolet/express-g3500/2013-2013/remont/exteriorinterior-trim/#interior-trim-and-interior-paneling) .
2. Remove the electrical connector from the rearview mirror.
3. Remove the nuts that retain the rearview mirror filler to the door.
4. Remove the rearview mirror filler from the door.

Installation Procedure

1. Install the rearview mirror filler to the door.
2. Install the nuts in order to retain the rearview mirror filler to the door and tighten to 10 N.m (89 lb in).
3. Install the front door front garnish molding. Refer to «Front Side Door Front Garnish Molding Replacement»(/chevrolet/express-g3500/2013-2013/remont/exteriorinterior-trim/#interior-trim-and-interior-paneling) .

1. Remove the front door trim plate (1). Refer to «Front Door Trim Plate Replacement»(/chevrolet/express-g3500/2013-2013/remont/exteriorinterior-trim/#interior-trim-and-interior-paneling) .
2. Remove the electrical connector (2) from the power mirror switch (9).
3. Release the clip that retains the power mirror switch (9) to the front door trim plate (1).
4. Remove the power mirror switch (9) from the front door trim plate (1).

1. Install the power mirror switch (9) to the front door trim plate (1).
2. Press the power mirror switch (9) towards the front door in order to engage the retaining tabs to the front door trim plate (1).
3. Install the electrical connector (2) to the power mirror switch (9).
4. Install the front door trim plate (1). Refer to «Front Door Trim Plate Replacement»(/chevrolet/express-g3500/2013-2013/remont/exteriorinterior-trim/#interior-trim-and-interior-paneling) .

1. Remove the front door garnish molding. Refer to «Front Side Door Front Garnish Molding Replacement»(/chevrolet/express-g3500/2013-2013/remont/exteriorinterior-trim/#interior-trim-and-interior-paneling) .
2. Remove the nuts that retain the rearview mirror to the door.
3. Remove the rearview mirror from the door.

1. Install the rearview mirror to the door.
2. Install the nuts in order to retain the rearview mirror to the door and tighten to 10 N.m (89 lb in).
3. Install the front door front garnish molding. Refer to «Front Side Door Front Garnish Molding Replacement»(/chevrolet/express-g3500/2013-2013/remont/exteriorinterior-trim/#interior-trim-and-interior-paneling) .

Scheme 3

Manual Mirror Replacement (DHC)

1. Remove the front door trim panel. Refer to «Front Side Door Trim Panel Replacement»(/chevrolet/express-g3500/2013-2013/remont/exteriorinterior-trim/#interior-trim-and-interior-paneling) .
2. Remove the nuts from the outside rearview mirror.
3. Disconnect the electrical connector from the outside rearview mirror.
4. Remove the outside rearview mirror from the front door.

1. Install the outside rearview mirror to the front door.
2. Install the outside rearview mirror nuts and tighten to 10 N.m (89 lb in).
3. Connect the electrical connector to the outside rearview mirror.
4. Install the front door trim panel. Refer to «Front Side Door Trim Panel Replacement»(/chevrolet/express-g3500/2013-2013/remont/exteriorinterior-trim/#interior-trim-and-interior-paneling) .

1. Remove the damaged mirror back and the glass-assembly from the mirror housing by completing the following steps: Insert your fingers as far as possible behind the mirror back toward the center of the back. With force sufficient in order to disengage the snap-fits from the adjuster mechanism, pull the mirror back out of the housing.
2. Inspect the adjuster mechanism for damage.
3. If the mirror has the heated feature, unplug the 2 electrical connections from the mirror back.
4. Remove the mirror face from the mirror housing.

1. Remove the replacement mirror back and glass sub-assembly from the package.
2. Inspect the components for any damage. Ensure that the mirror back and the glass sub-assembly have all the snap-fit hooks in place.
3. If the mirror has the heated feature, plug in the 2 electrical connectors to the back of the mirror back.
4. Align the mirror back snap-fit hooks with the adjuster mechanism ramps.
5. Gently press the mirror back into the adjuster mechanism with the palm of the hand on the center of the glass. Use the palm of the hand to rotate the glass about the glass pivot until the engagement of the snap-fit hooks.
6. Perform the following procedure in order to ensure that the mirror glass is fully installed: Place foam below the mirror assembly to catch the glass if it should fall. Hold the assembly so that the mirror glass is face down, while taking care that the mirror hosing is not scratched, slap the upward surface of the housing. The mirror glass should stay retained in the housing.
7. Observe the following conditions that indicate a successful installation: The mirror back remains firmly attached to the motor pack. Electrical/Manual action of the mirror is possible.

Scheme 4

Outside Rearview Mirror Glass Replacement - Lower

Scheme 5

Outside Rearview Mirror Glass Replacement - Upper

1. Remove the outside rearview camper mirror head from the vehicle.
2. Remove the nuts that retain the outside rearview camper mirror braces to the door.
3. Remove the outside rearview camper mirror braces from the vehicle.

1. Install the outside rearview camper mirror braces to the vehicle.
2. Align the holes in the outside rearview camper mirror braces with the studs on the door.
3. Install the nuts that retain the outside rearview camper mirror braces to the door. Do not tighten the nuts.
4. Install the outside rearview camper mirror head to the vehicle and tighten to 4 N.m (35 lb in).

1. Remove the commercial outside rearview mirror head from the vehicle.
2. Remove the nuts that retain the commercial outside rearview mirror braces to the door.
3. Remove the commercial outside rearview mirror braces from the vehicle.

1. Install the commercial outside rearview mirror braces to the vehicle.
2. Align the holes in the commercial outside rearview mirror braces with the studs on the door.
3. Install the nuts that retain the commercial outside rearview mirror braces to the door. Do not tighten the nuts.
4. Install the commercial outside rearview mirror head to the vehicle. Tighten the retaining nuts to 4 N.m (35 lb in).
5. Perform the following procedure when the mirror installation is complete: Position the mirror support arm approximately 90 degrees to the door panel. Torque the following pivot nuts: The upper brace The lower brace The mirror support arm Tighten the pivot nuts to 12 N.m (106 lb in).

Scheme 6

Inside Rearview Mirror Replacement

Inside Rearview Mirror Bracket Installation

Special Tools

Safety Razor or Utility Knife

Scheme 7

1. Determine the location of the mirror mounting base by marking the outside of the windshield with a marking pencil where the base was previously located. If it is not clear where the base was mounted, use the following steps to determine where the base should be installed: Using a measuring tape, measure the distance between the windshield pillars from the base of the shade line. Using a marking pencil, halfway between the windshield pillars, draw a centerline (1) on the windshield from the roof panel to the windshield base. Draw a perpendicular line intersecting the centerline (2) at that location. The top center of the mirror mounting base will be at the intersection of these lines.
2. Scrape the inside windshield glass thoroughly with a safety razor or utility knife in order to remove all old adhesive.
3. If reinstalling the original mounting base, place the mirror mounting base in a suitable holding device, such as a vice.
4. Scrape the mirror mounting base thoroughly with a safety razor or utility knife in order to remove all old adhesive.
5. Clean the inside windshield glass and the mounting surface of the mirror mounting base thoroughly with a clean cloth saturated with naphtha or a 50/50 mixture (by volume) of clean water and isopropyl alcohol.
6. Use Inside Mirror Adhesive Kit GM P/N 89021329, (Canadian P/N 993362) or equivalent to apply a small amount of activator to the mounting surface of the mirror mounting base.
7. Apply a small amount of activator to the windshield where the mounting base is to be installed.
8. Allow the activator to dry 5 minutes.
9. Apply 1 drop of adhesive to the center of the mirror mounting base.
10. Immediately apply the mounting base to the windshield, ensuring that the mounting base aligns correctly to the marks made on the outside of the windshield.
11. Hold the mounting base firmly in place for 1 minute.
12. Allow the adhesive to set for 15 minutes.
13. Install the mirror to the mirror mounting base and fasten, if necessary.
14. Connect the electrical connector and install the wire cover, if equipped.

The power mirror system consists of the following components

1. Power mirror switch
2. Selector switch
3. Left outside power mirror
4. Right outside power mirror
5. OSRVM 10A fuse
6. HVAC control module
7. Left outside power mirror
8. Right outside power mirror

Each of the outside power mirrors contains two reversible motors. The vertical motor operates the up and down directions and the horizontal motor operates the left and right directions. Each of the power mirror motors are circuit breaker protected.

The power mirror switch incorporates a mirror select switch and a four position mirror direction switch.

The mirror select switch allows the operator to select the mirror to be moved by rotating counterclockwise to the L position, left outside power mirror, or rotating clockwise to the R position, right outside power mirror.

The mirror direction switch is a 4 position switch that allows the operator to move the selected mirror up, down, left or right.

The power mirror switch receives power through the battery supply voltage circuit and the OSRVM fuse. 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 interrupts or 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 depressed, battery voltage will be supplied to the left outside power mirror vertical motor through the left mirror motor up direction circuit and return to the power mirror switch through the mirror motor common circuit then to ground and the mirror will move up. If the down switch is depressed, the common circuit supplies battery voltage and the left mirror motor up direction circuit completes the path to the power mirror switch then to ground and the mirror will move down.

The remainder of the mirror functions operate in the same manner as described above. The thing to remember is, that by placing the power mirror switch in opposing positions (left/right or up/down) will reverse the polarity of the mirror motor, utilizing the same circuits and the power mirror will move accordingly.

Heated Mirror System Controls

The heated mirror system is activated by depressing the rear window defogger switch, which is part of the HVAC control module. For further information on the rear window defogger operation, refer to Rear Window Defogger Description and Operation .

Heated Mirror System Operation

The heated mirror system operates in parallel to the rear window defogger. Each outside rearview mirror contains a heating element that is connected to a constant ground source. When the rear window defogger system is active, battery voltage is available to the outside rearview mirrors through the heated mirror supply voltage circuit. The mirrors will heat up to remove ice, snow or frost and will automatically deactivate when the rear defogger system has timed out, approximately 10 minutes.

See also:
• Diagnostic System Check - Vehicle
• Checking Aftermarket Accessories
• Testing for Intermittent Conditions and Poor Connections
• Strategy Based Diagnosis
• Diagnostic Procedure Instructions
• Component Connector End Views
• Circuit Testing
• Connector Repairs
• Wiring Repairs
• Control Module References
• Rear Window Defogger Malfunction
• Diagnostic Repair Verification
• Front Side Door Front Garnish Molding Replacement
• Fastener Caution
• Outside Mirror Description and Operation