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 MANUALSCHEVROLET2002AVALANCHE 2500, RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 643 (CRUISE CONTROL SYSTEM)
2002 Chevrolet Avalanche 2500, RWD
Section 643 (Cruise Control System)
2002 Chevrolet Avalanche 2500, RWDSECTION Section 643 (Cruise Control System)
WARNING: This page is about a different car, the 2002 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Schematic and Routing Diagrams
- Component Locator
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Cruise Control
- Diagnostic System Check - Cruise Control
- Scan Tool Output Controls
- Scan Tool Data List
- Scan Tool Data Definitions (Cruise Control)
- Scan Tool Data Definitions (Disengage History)
- Diagnostic Trouble Code (DTC) List
- DTC P1554: Cruise Control Engaged Signal While Inhibiting Cruise Control Operation
- DTC P1585: Improper Voltage Level On The Cruise Inhibit Signal Circuit
- Symptoms - Cruise Control
- Cruise Control Indicator Always On
- Cruise Control Indicator Inoperative
- Cruise Control Inoperative/Malfunctioning
- Repair Instructions
- Description and Operation
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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.