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 MANUALSCHEVROLET2006CHEVY EXPRESS G2500, VAN CARGO, 6.6 2REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 710 (BATTERY, CHARGING SYSTEM AND STARTING SYSTEM - TROUBLESHOOTING)ENGINE WILL NOT CRANK (HP2)REFERENCE INFORMATIONCONNECTOR END VIEW REFERENCE
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2
Connector End View Reference
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION Connector End View Reference
WARNING: This page is about a different car, the 2006 GMC Sierra, 2006 GMC Cab & Chassis Sierra, 2006 Chevrolet Silverado, and 2006 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Engine Electrical Connector End Views
Electrical Information Reference
- Circuit Testing
- Connector Repairs
- Testing for Intermittent Conditions and Poor Connections
- Wiring Repairs
IMPORTANT:
- Ensure the Energy Storage Battery Pack is fully charged.
- Ensure the 175A Hybrid fuse in the under hood fuse block is functional.
- Always perform the Energy Storage Box (ESB) Service Disconnect/Connect (5.3L Engine w/RPO HP2) before diagnosing or servicing any PHT systems.
- It is imperative that the 3-phase cable connections are clean and the fasteners are torqued to specifications. Torque specifications are 14 N*m +/- 2 N*m at the starter generator, and 15 N*m +/-2 N*m at the SGCM.
- Turn the ignition OFF.
- Disconnect the 3-phase cable from the Stator (Electric Machine). Refer to Starter/Generator Control Module (SGCM) (3-Phase) Cable Replacement (5.3L Engine w/RPO HP2)
. Test for shorts between the stator connections, and to chassis ground.
- If a short is confirmed, replace the Starter Generator Stator.
- Disconnect the 3-phase cables from the SGCM. Refer to Starter/Generator Control Module (SGCM) (3-Phase) Cable Replacement (5.3L Engine w/RPO HP2)
. Test the 3-phase cables circuits for shorts between cables, and short to chassis ground.
- If a short is confirmed, replace the 3-phase cables.
- If no trouble found, replace the SGCM.
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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.