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 MANUALSCHEVROLET1999SUBURBAN C2500, 6.5 FREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCRUISE CONTROL SYSTEMSCRUISE CONTROL SYSTEM - TRUCKS DIESELSYSTEM TESTSCRUISE CONTROL WILL NOT RESUME, ACCELERATE, TAP-UP OR TAP-DOWNMOTORHOME
1999 Chevrolet Suburban C2500, 6.5 F
Cruise Control Will Not Resume, Accelerate, Tap-Up Or Tap-Down: Motorhome
1999 Chevrolet Suburban C2500, 6.5 FSECTION Motorhome
- Disconnect Powertrain Control Module (PCM) 32-pin connector C1 (Brown). Turn ignition switch to RUN position. Connect a test light between PCM connector C1 (harness side) terminal D10 (Gray/Black wire) and ground. Press and hold cruise control switch in R/A position. If test light does not illuminate, go to next step. If test light illuminates, replace PCM.
- Connect a test light between multifunction lever (cruise control switch) connector (harness side) terminal "C" (Gray/Black wire) and ground. Press and hold cruise control switch in R/A position. If test light illuminates, repair open in Gray/Black wire between multifunction lever (cruise control switch) and PCM. If test light does not illuminate, replace multifunction lever (cruise control switch). See appropriate STEERING COLUMN SWITCHES article.
RENDER: 1.0x
NO RELATED
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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.