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 MANUALSCHEVROLET1990R 20 P/U 2WD V8-379 6.2L DSLREPAIR AND DIAGNOSISCRUISE CONTROLCRUISE CONTROL MODULEDESCRIPTION AND OPERATION
1990 Chevrolet R 20 P/U 2WD V8-379 6.2L DSL
Cruise Control Module: Description and Operation
1990 Chevrolet R 20 P/U 2WD V8-379 6.2L DSLSECTION Description and Operation
The module monitors mode control switch position, signals from the speed sensor, servo position and release switch operation, then operates vacuum valves within the servo unit to control servo operation and vehicle speed. The module also contains a speed limiting function which prevents system operation at speeds below approximately 25 mph.
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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.