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 MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1534 (HYBRID ENGINE CONTROL SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC P2797CIRCUIT/SYSTEM TESTINGUNABLE TO START
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6
Unable to Start
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Unable to Start
WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
- This display indicates the ATFP control module has monitored motor current of more than 20 A during motor start-up.
- Inspect for the following conditions:
- Automatic transmission fluid pressure trapped internally
- Poor terminal connection or wiring degradation
- External indication of ATFP pump motor damage
- If none of the conditions are observed, replace the ATFP motor/pump assembly and the ATFP control module.
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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.