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 407 (ENGINE COOLING SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESSCAN TOOL OUTPUT CONTROLS
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2
Scan Tool Output Controls
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION Scan Tool Output Controls
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Hybrid Control Module (HCM) Scan Tool Output Controls
| Scan Tool Output Control | Additional Menu Selection(s) | Description |
|---|---|---|
| Auxiliary Coolant Pump Relay | HPCM | Commands the auxiliary coolant pump relay ON and OFF. |
Instrument Cluster Scan Tool Output Controls
| Scan Tool Output Control | Additional Menu Selection(s) | Description |
|---|---|---|
| Special Functions | Lamp Test | Command the instrument cluster to illuminate all lamps in the cluster. |
| Special Functions | IPC Gages | Command the instrument cluster to sweep all gages. |
| Special Functions | Segment Tests | Command the instrument cluster message center to display all segments. |
Starter Generator Control Module (SGCM) Scan Tool Output Controls
| Scan Tool Output Control | Additional Menu Selection(s) | Description |
|---|---|---|
| SGCM Fan Speed | SGCM | Commands the SGCM coolant fan ON and OFF. 0% for OFF and 100% for ON. |
| SGCM Pump Speed | SGCM | Commands the SGCM coolant pump ON and OFF. |
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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.