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 MANUALSGMC1995FORWARD CONTROL 4.3 Z, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)EXTERNAL PAGESDIFFERENT CARSECTION 69 (ENGINE CONTROLS - SYSTEM/COMPONENT TESTS - 5.2L CNG)COMPUTERIZED ENGINE CONTROLSPOWERTRAIN CONTROL MODULE (PCM)DIAGNOSTIC CHECK
1995 GMC Forward Control 4.3 Z, Standard
Diagnostic Check
1995 GMC Forward Control 4.3 Z, StandardSECTION Diagnostic Check
WARNING: This page is about a different car, the 1995 Dodge Ram Wagon, 1995 Dodge Ram Van, 1995 Dodge Pickup, and 1995 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
PCM is tested using DRB. See appropriate testing in TESTS W/CODES - 5.2L CNG article in the ENGINE PERFORMANCE section.
RENDER: 1.0x
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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.