Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2006SUBURBAN C2500, 6.0 UREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1585 (MIRROR SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESPOWER MIRRORS INOPERATIVECIRCUIT/SYSTEM TESTING
2006 Chevrolet Suburban C2500, 6.0 U
Circuit/System Testing
2006 Chevrolet Suburban C2500, 6.0 USECTION Circuit/System Testing
WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the harness connector at the outside rearview mirror switch.
- Ignition OFF for 1 minute, test for less than 10 ohms between the ground circuit terminal 1 and ground.
- If greater than the specified range, test the ground circuit for an open/high resistance.
- Verify that a test lamp illuminates between the B+ circuit terminal 3 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 replace the BCM.
- Connect the harness connector at the outside rearview mirror switch.
- Disconnect the harness connector at the appropriate outside rearview mirror.
- Connect a test lamp between the listed control circuit terminals.
- Driver terminal 6 and terminal 5
- Passenger terminal 1 and terminal 2
- 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.
- Connect a test lamp between the control circuit terminals.
- Driver terminal 4 and terminal 5
- Passenger terminal 3 and terminal 2
- 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.
- If all circuits test normal, test or replace the outside rearview mirror motor.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.