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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET1997CHEVY EXPRESS G3500, VAN CARGO, 6.5 FREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 88 (REAR WINDOW DEFOGGER & MIRROR DEFOGGER)TESTINGDEFOGGER SYSTEM TESTSSYSTEM CHECK
1997 Chevrolet Chevy Express G3500, Van Cargo, 6.5 F
System Check
1997 Chevrolet Chevy Express G3500, Van Cargo, 6.5 FSECTION System Check
WARNING: This page is about a different car, the 1998 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
- Turn ignition switch to RUN position. Press and release rear defogger switch once. Switch should return to resting position. System should come on. System is on if rear window becomes warm, mirrors become warm (if equipped) and indicator light comes on. If some grid lines do not become warm, go to GRID FILAMENT TEST .
- After about 10 minutes, system should automatically turn off. Press and release rear defogger switch again. System should come on. After about 5 minutes, system should automatically turn off. Unless ignition is turned off then on again, system should operate in 5-minute cycles.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.