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 MANUALSCHEVROLET2019TRAX PREMIER, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 113 (MIRROR SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B154A OR B154BCIRCUIT/SYSTEM VERIFICATION
2019 Chevrolet Trax Premier, AWD
Circuit/System Verification
2019 Chevrolet Trax Premier, AWDSECTION Circuit/System Verification
WARNING: This page is about a different car, the 2018 Chevrolet Trax and 2018 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON.
- Verify the A9A Outside Rearview Mirror - Driver moves when commanding the Driver Mirror Horizontal Movement Right/Left and Driver Mirror Vertical Movement Up/Down with a scan tool.
- If the A9A Outside Rearview Mirror - Driver does not move RIGHT or LEFT or UP or DOWN
Replace the M77D Outside Rearview Mirror Motor - Driver.
- Go to next step: If the A9A Outside Rearview Mirror-Driver moves RIGHT, LEFT, UP and DOWN
- If the A9A Outside Rearview Mirror - Driver does not move RIGHT or LEFT or UP or DOWN
- Verify the A9B Outside Rearview Mirror-Passenger moves when commanding the Passenger Mirror Horizontal Movement Right/Left and Passenger Mirror Vertical Movement Up/Down with a scan tool.
- If the A9B Outside Rearview Mirror-Passenger does not move RIGHT or LEFT or UP or DOWN
Replace the M77P Outside Rearview Mirror Motor - Passenger.
- Go to next step: If the A9B Outside Rearview Mirror-Passenger moves RIGHT, LEFT, UP and DOWN
- If the A9B Outside Rearview Mirror-Passenger does not move RIGHT or LEFT or UP or DOWN
- All OK.
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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.