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 MANUALSCHEVROLET1993SPORTVAN G30, VAN PASSENGER, 7.4 NREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 32 (ENGINE CONTROLS - REMOVE/INSTALL/OVERHAUL)POWERTRAIN CONTROL MODULE (PCM)MEM-CALINSTALLATION
1993 Chevrolet Sportvan G30, Van Passenger, 7.4 N
Powertrain Control Module (Pcm): Mem-Cal: Installation
1993 Chevrolet Sportvan G30, Van Passenger, 7.4 NSECTION Installation
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 1994 GMC Vandura Special, 1994 GMC Vandura, 1994 GMC Rally Camper Special, 1994 GMC Rally, and 1994 GMC Forward Control. However, it is still accessible from the selected car via links, so may be relevant.
- Carefully align MEM-CAL pins with PCM pin holes. DO NOT press in middle of MEM-CAL. Push downward evenly on ends of MEM-CAL until retaining clips on ends of MEM-CAL snap into place.
- Install PCM. Reconnect negative battery cable. Turn ignition on and ground DLC terminal "B". Code 12 should be flashed at least 4 times. If Code 12 is not flashed at least 4 times, other codes are present. If Code(s) 51 or 52 are present, or if CHECK ENGINE light stays on constantly with code(s) present, MEM-CAL is not fully seated, or is defective.
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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.