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 MANUALSCHEVROLET2001C3500 HD 8.1 G, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - 6.5L (L65) (INTRODUCTION)SPECIFICATIONSGM SPO GROUP NUMBERS
2001 Chevrolet C3500 HD 8.1 G, Automatic
GM SPO Group Numbers
2001 Chevrolet C3500 HD 8.1 G, AutomaticSECTION GM SPO Group Numbers
GM SPO Group Numbers
| Parts Name | Group |
|---|---|
| Air Cleaner Assembly | 3.402 |
| Air Cleaner Filter | 3.410 |
| C/Case Depression Regulator Valve | 1.745 |
| C/Case Depression Regulator Valve Hose | 1.762 |
| Engine Control Module | 3.670 |
| Engine Coolant Temperature Sensor | 3.682 |
| Fuel Filter | 3.890 |
| Fuel Tank | 3.001 |
| Glow Plug | 2.270 |
| Glow Plug Relay | 2.510 |
RENDER: 1.0x
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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.