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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET1990LUMINA APV V6-191 3.1LREPAIR AND DIAGNOSISCRUISE CONTROLTESTING AND INSPECTIONINITIAL INSPECTION AND DIAGNOSTIC OVERVIEW
1990 Chevrolet Lumina APV V6-191 3.1L
Initial Inspection and Diagnostic Overview
1990 Chevrolet Lumina APV V6-191 3.1LSECTION Initial Inspection and Diagnostic Overview
Perform these checks as the first step in diagnosing any cruise control complaint. If preliminary checks prove satisfactory, proceed to SYSTEM DIAGNOSIS for further testing.
1. Road test vehicle for system operation and verify complaint.
2. Inspect vacuum hoses and fittings. Repair all loose connections, damaged fittings or hoses and kinked, plugged or improperly routed hoses.
3. Inspect wiring harness, connectors and grounds. Repair loose or improper connections and damaged wiring or connectors.
4. Inspect servo and throttle linkage for binding or sticking, and repair as needed. Ensure linkages are properly adjusted.
5. Recheck system operation.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.