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 MANUALSCHEVROLET1999SUBURBAN C2500, 6.5 FREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEMIRRORSPOWER MIRROR SYSTEMSYSTEM TESTSSIERRA & SILVERADOBOTH POWER MIRRORS INOPERATIVE
1999 Chevrolet Suburban C2500, 6.5 F
Both Power Mirrors Inoperative
1999 Chevrolet Suburban C2500, 6.5 FSECTION Both Power Mirrors Inoperative
- Check MIR/LOCK fuse (3-amp) in left bussed electrical center, lower left side of instrument panel. Check ground G203 at left upper instrument panel, next to "A" pillar. If MIR/LOCK fuse is okay and ground G203 is clean and tight, go to next step. If MIR/LOCK fuse is blown, check circuit 2140 (Orange wire) for a short to ground. See WIRING DIAGRAMS . Repair as necessary and retest system.
- Remove power mirror switch from left door panel with wiring connected. Using a test light connected to ground, backprobe power mirror switch terminal "G" (Orange wire). See Figure . If test light illuminates, go to next step. If test light does not illuminate, repair open in Orange wire between power mirror switch and left bussed electrical center. See WIRING DIAGRAMS .
- Connect test light between power mirror switch harness connector terminals "G" (Orange wire) and "B" (Black wire). See Figure . If test light does not illuminate, repair open in Black wire between power mirror switch connector terminal "B" and ground G203, at left upper instrument panel, next to "A" pillar. See WIRING DIAGRAMS . If test light illuminates, replace power mirror switch.
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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.