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 & FRAMEDOOR LOCKSPOWER DOOR LOCK SYSTEMSYMPTOM TESTSTEST B: POWER DOOR LOCK INOPERATIVE - UNLOCK OPERATES
1999 Chevrolet Chevy Express G1500, Van Cargo, 5.7 R
Test B: Power Door Lock Inoperative - Unlock Operates
1999 Chevrolet Chevy Express G1500, Van Cargo, 5.7 RSECTION Test B: Power Door Lock Inoperative - Unlock Operates
- Disconnect power door lock relay connector. Connect test light between power door lock relay connector terminal "F" (Light Blue wire) and ground. See Figure . Press LOCK button on any power door lock switch. If test light is on, go to next step. If test light is off, go to step 3 .
- Replace power door lock relay. After repairs, go to step 4 .
- Repair open in Light Blue wire between splice S241 and power door lock relay. After repairs, go to next step.
- Operate system to verify repair.
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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.