GM Full Size Vans 1987-1997 Repair Guide

General Information

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Cruise control maintains a desired vehicle speed under normal driving conditions.

There are two different cruise control systems used on the Chevrolet/GMC full size vans. They are vacuum and electro-motor operated systems.

The vacuum system components are:



Mode control switches
 
Controller (module)
 
Servo unit
 
Speed sensor
 
Vacuum supply
 
Electrical and vacuum release switches
 
Electrical harness
 

The Electro-motor system components are:



Brake release switch
 
Multi-function lever
 
Module
 
VCM or PCM
 
Vehicle speed sensor
 

See Figure 1



Click image to see an enlarged view

Fig. Fig. 1: Cruise Control Troubleshooting

 
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