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 MANUALSCHEVROLET1997CHEVY EXPRESS G3500, VAN CARGO, 6.5 FREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 89 (MEMORY SYSTEM)TROUBLE SHOOTINGPRELIMINARY CHECKS
1997 Chevrolet Chevy Express G3500, Van Cargo, 6.5 F
Preliminary Checks
1997 Chevrolet Chevy Express G3500, Van Cargo, 6.5 FSECTION Preliminary Checks
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.
- Check IGN 1 fuse (10-amp) and TMNSS fuse (15-amp) in instrument panel fuse block. Check I/P 1 fuse (10-amp) in right rear power junction block. Check PWR ST circuit breaker (25-amp) in right rear junction block. Ensure ground connections are clean and tight. Check for proper installation of aftermarket electronic equipment.
- On Aurora, if I/P 1 fuse is blown, power is still supplied from HZRD/STOP fuse (20-amp) to left seat/lock switch, left seat switch and outside mirror switch. These components may not be completely shut down.
- On all models, if memory seat/memory mirror module will not enter self-diagnostics, ensure memory seat diagnostic connector is properly grounded. Check for open in Yellow/Black wire between memory seat/mirror module and memory seat/mirror diagnostic connector. Check for poor connections. If connections and circuits are okay, replace memory seat/mirror module.
- If parallel parking mode is inoperative and memory recall functions when gearshift lever is out of Park, check for open or short to ground in Brown wire between memory seat/mirror and outside right rear view mirror. If circuit is okay, replace PNP switch.
- If seat motor internal circuit breaker is tripped, remove voltage from motor to reset. Check for broken or partially broken wire inside of insulation, which could cause system malfunction but prove good in a continuity/voltage check with system disconnected. These circuits may be intermittent or resistive when loaded.
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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.