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 MANUALSCHEVROLET1990STEP VAN 6.2 J, AUTOMATIC, 3L80-HD/M40REPAIR AND DIAGNOSIS (SINGLE PAGE)HEATING, VENTILATION & A/C (HVAC)GENERAL SERVICINGA/C SYSTEM GENERAL SERVICING1991 TRUCK/VAN SERVICE VALVES LOCATION
1990 Chevrolet Step Van 6.2 J, Automatic, 3L80-HD/M40
1991 Truck/Van Service Valves Location
1990 Chevrolet Step Van 6.2 J, Automatic, 3L80-HD/M40SECTION 1991 Truck/Van Service Valves Location
1991 TRUCKS & VANS SERVICE VALVE LOCATIONS
| Vehicle | High | Low | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Trucks & Vans (1) | |||||||||||||
| "C" & "K" Series | (2) | (3) | |||||||||||
| "G" Series | (2) | (5) | |||||||||||
| "L" & "M" Series | (4) | (5) | |||||||||||
| "P", "R" & "V" Series | (2) | (5) | |||||||||||
| "S" &"T" Series | (2) | (5) | |||||||||||
| "U" Series | (2) | (5) | |||||||||||
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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.