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)SYSTEM TESTSONE POSITION DOES NOT SET OR RECALL
1997 Chevrolet Chevy Express G3500, Van Cargo, 6.5 F
One Position Does Not Set Or Recall
1997 Chevrolet Chevy Express G3500, Van Cargo, 6.5 FSECTION One Position Does Not Set Or Recall
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.
NOTE:
After repair or component replacement is completed, perform appropriate MEMORY SYSTEM CHECK under TROUBLE SHOOTING
to verify system is functioning properly.
- Perform appropriate MEMORY SYSTEM CHECK under TROUBLE SHOOTING . Go to next step.
- Turn ignition switch to OFF position. Ground memory seat diagnostic connector, located under driver seat. Memory seat/mirror module will chime once to indicate Mode 1 has been entered. Remove ground from memory seat diagnostic connector, and within 5 seconds, ground memory seat diagnostic connector again. Module will chime 2 times to indicate Mode 2 has been entered. Operate seat and mirrors in all directions. Module will chime once at each open, shorted or faulty position sensor or circuit. If any seat switch positions caused memory seat/mirror module chime to sound, go to next step. If any seat switch position did not cause memory seat/mirror module to sound, go to step 8).
- Check for open or short in appropriate wire between memory seat/memory mirror module and position sensors. See IDENTIFYING POSITION SENSOR CIRCUITS
table. See WIRING DIAGRAMS
. If circuit is okay, go to next step. If circuit is not okay, go to step 7).IDENTIFYING POSITION SENSOR CIRCUITS
Application Wire Color Left Mirror Left/Right Gray Left Mirror Up/Down Dark Green Right Mirror Left/Right Light Blue/Black Right Mirror Up/Down Brown Seat Rear Height Tan Seat Front Height Brown/White Seat Forward/Back Dark Green - Check for open in Gray wire between appropriate seat position sensor and splice S324, or between mirror position sensor and splice S323. If circuit is okay, go to next step. If circuit is not okay, go tostep 7).
- Check for open in Black wire between appropriate seat position sensor and splice S332, or between mirror position sensor and splice S331. If circuit is okay, go to next step. If circuit is not okay, go to step 7).
- Replace inoperative position sensor.
- Repair open in appropriate wire. See WIRING DIAGRAMS .
- System is functioning properly. Perform appropriate MEMORY SYSTEM CHECK under TROUBLE SHOOTING. If symptom still exists, replace memory seat/mirror module. See MEMORY SEAT/MIRROR MODULE under REMOVAL & INSTALLATION.
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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.