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 MANUALSGMC1998CAB & CHASSIS C2500, 5.7 KREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 249 (CRUISE CONTROL SYSTEM)
1998 GMC Cab & Chassis C2500, 5.7 K
Section 249 (Cruise Control System)
1998 GMC Cab & Chassis C2500, 5.7 KSECTION Section 249 (Cruise Control System)
WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
- Description & Operation
- Component Locations
- Programming
- Adjustments
- Trouble Shooting
- Self-Diagnostic System
- Diagnostic Tests
- DTC P0574: Powertrain Control Module Detects High Vehicle Speed
- DTC P1554: Powertrain Control Module Detects Cruise Engaged Signal
- DTC P1560: Cruise Control Engaged With Vehicle In Neutral Or Park
- DTC P1564: Powertrain Control Module Detects Rapid Acceleration
- DTC P1566: Powertrain Control Module Detects High Engine Speed
- DTC P1567: Traction Control System Applied Brakes
- DTC P1570: Traction Control Active Cruise Disabled
- DTC P1574: BRAKELIGHT Switch Circuit
- DTC P1585: Cruise Control Inhibit Output Circuit
- System Tests
- Removal & Installation
- Wiring Diagrams
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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.