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 MANUALSCHEVROLET1999CHEVY EXPRESS G1500, VAN CARGO, 5.7 RREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEMIRRORSPOWER MIRROR SYSTEMSYSTEM TESTSEXPRESS & SAVANALEFT-SIDE POWER MIRROR INOPERATIVE IN LEFT/RIGHT POSITIONS
1999 Chevrolet Chevy Express G1500, Van Cargo, 5.7 R
Left-Side Power Mirror Inoperative In Left/Right Positions
1999 Chevrolet Chevy Express G1500, Van Cargo, 5.7 RSECTION Left-Side Power Mirror Inoperative In Left/Right Positions
- Disconnect power mirror switch harness connector. Connect ohmmeter between power mirror switch terminals "E" (Orange wire) and "G" (Light Blue wire). See Figure . With left-side mirror selected, move power mirror switch to LEFT position. If continuity exists, go to next step. If continuity does not exist, replace power mirror switch.
- Connect ohmmeter between power mirror switch terminals "D" (Black wire) and "C" (Light Green wire). See Figure . Move power mirror switch to LEFT position. If continuity exists, go to next step. If continuity does not exist, replace power mirror switch.
- Connect ohmmeter between power mirror switch terminals "D" (Black wire) and "G" (Light Blue wire). See Figure . Move power mirror switch to RIGHT position. If continuity exists, go to next step. If continuity does not exist, replace power mirror switch.
- Connect ohmmeter between power mirror switch terminals "E" (Orange wire) and "C" (Light Green wire). See Figure . Move power mirror switch to RIGHT position. If continuity exists, go to next step. If continuity does not exist, replace power mirror switch.
- Disconnect left-side power mirror harness connector. Connect ohmmeter between power mirror switch harness connector terminal "G" and left-side power mirror harness connector terminal "F" (Light Blue wire). See Figure and Figure . If continuity exists, go to next step. If continuity does not exist, repair open in Light Blue wire between power mirror switch connector terminal "G" and left-side power mirror connector terminal "F". See WIRING DIAGRAMS .
- Connect ohmmeter between power mirror switch harness connector terminal "C" and left-side power mirror harness connector terminal "C" (Light Green wire). See Figure and Figure . If continuity exists, replace left-side power mirror. See POWER MIRROR ASSEMBLY under REMOVAL & INSTALLATION. If continuity, does not exist, repair open in Light Green wire between power mirror switch connector terminal "C" and left-side power mirror connector terminal "C". See WIRING DIAGRAMS .
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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.