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 MANUALSCHEVROLET1999EXPRESS 1 TON VAN V8-5.7L VIN RREPAIR AND DIAGNOSISCRUISE CONTROLDESCRIPTION AND OPERATIONCRUISE CONTROL SYSTEM
1999 Chevrolet Express 1 Ton Van V8-5.7L VIN R
Cruise Control System
1999 Chevrolet Express 1 Ton Van V8-5.7L VIN RSECTION Cruise Control System
GASOLINE ENGINES
The cruise control system on gasoline engines consists of the following components:
^ The Vehicle Control Module (VCM)
^ The cruise control module
^ The multifunction lever
^ The brake release switch
The cruise control module contains a stepper motor that is used to change throttle position. The cruise control module receives commands from the multifunction lever. The cruise control module receives vehicle speed from the VCM. The cruise control module controls speed based on these input commands and the vehicle speed.
DIESEL ENGINES
The cruise control system on the diesel engines consists of the following components:
^ The Powertrain Control Module (PCM)
^ The electronic throttle control system
^ The Vehicle Speed Sensor Buffer (VSSB)
^ The multifunction lever
^ The brake release switch
The PCM receives commands from the multifunction lever. The PCM also receives vehicle speed information from the VSSB. The PCM sends information to the electronic throttle control system in order to control vehicle speed based on these input commands and vehicle speed.
The cruise control system on gasoline engines consists of the following components:
^ The Vehicle Control Module (VCM)
^ The cruise control module
^ The multifunction lever
^ The brake release switch
The cruise control module contains a stepper motor that is used to change throttle position. The cruise control module receives commands from the multifunction lever. The cruise control module receives vehicle speed from the VCM. The cruise control module controls speed based on these input commands and the vehicle speed.
DIESEL ENGINES
The cruise control system on the diesel engines consists of the following components:
^ The Powertrain Control Module (PCM)
^ The electronic throttle control system
^ The Vehicle Speed Sensor Buffer (VSSB)
^ The multifunction lever
^ The brake release switch
The PCM receives commands from the multifunction lever. The PCM also receives vehicle speed information from the VSSB. The PCM sends information to the electronic throttle control system in order to control vehicle speed based on these input commands and vehicle speed.
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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.