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 MANUALSCHEVROLET1987STEP VAN P20, 7.4 W, AUTOMATIC, 400/M40REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 12 (ENGINE CONTROLS - TESTS W/CODES - 4.3L)SELF-DIAGNOSTIC SYSTEMECM LOCATION
1987 Chevrolet Step Van P20, 7.4 W, Automatic, 400/M40
ECM Location
1987 Chevrolet Step Van P20, 7.4 W, Automatic, 400/M40SECTION ECM Location
WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 1994 Oldsmobile Bravada, 1994 GMC Vandura, 1994 GMC Sonoma, 1994 GMC Safari, and 1994 GMC Rally. However, it is still accessible from the selected car via links, so may be relevant.
For ECM locations, see appropriate COMPONENT LOCATIONS illustration in appropriate I - SYS/COMP TESTS article in this section as listed below.
- I - SYSTEM/COMPONENT TESTS (for Astro & Safari)
- I - SYSTEM/COMPONENT TESTS (for "S" & "T" Series)
- I - SYSTEM/COMPONENT TESTS - GASOLINE (for "C" & "K" Series)
- I - SYSTEM/COMPONENT TESTS - GASOLINE (For "G" & "P" Series)
RENDER: 1.0x
NO RELATED
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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.