Mirror System: Other GMC Cutaway G3500

Intermittent

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

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 (Power Mirrors) , Outside Mirror Description and Operation (Heated Mirrors)

Electrical Information Reference

1. «Circuit Testing»(ref-478470-S19131911002012061100000)
2. «Connector Repairs»(ref-478470-S01172177192012061100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-478470-S26306246352012061100000)
4. «Wiring Repairs»(ref-478470-S01823217952012061100000)

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»(ref-478464-S35075437842012061100000) .
2. Verify both the left and right outside mirror glass become warm.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Outside Rearview Mirror Glass Replacement (Base Level)

Schematic Reference

Outside 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

1. «Circuit Testing»(ref-478470-S19131911002012061100000)
2. «Connector Repairs»(ref-478470-S01172177192012061100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-478470-S26306246352012061100000)
4. «Wiring Repairs»(ref-478470-S01823217952012061100000)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON, headlamps ON, vehicle in PARK, cover the front light sensor with a towel or other suitable item. Shine a flashlight at the rear light sensor while observing the inside rearview mirror face. The inside rearview mirror face should dim.
2. Park brake applied, place the transmission in REVERSE. The inside rearview mirror face should transition from dim to bright.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Inside Rearview Mirror Replacement

Schematic Reference

Outside Rearview Mirror Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Outside Mirror Description and Operation (Power Mirrors) , Outside Mirror Description and Operation (Heated Mirrors)

Electrical Information Reference

1. «Circuit Testing»(ref-478470-S19131911002012061100000)
2. «Connector Repairs»(ref-478470-S01172177192012061100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-478470-S26306246352012061100000)
4. «Wiring Repairs»(ref-478470-S01823217952012061100000)

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.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Power Mirror Replacement»(ref-478476-S31494553682012061100000)
2. «Power Mirror Switch Replacement»(ref-478476-S26196399072012061100000)