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 MANUALSCHEVROLET2002SILVERADO 1500 HD, RWDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - SYSTEM & COMPONENT TESTINGFUEL SYSTEM (DIESEL)GLOW PLUG SYSTEM DIAGNOSIS (6.6L)TEST DESCRIPTION
2002 Chevrolet Silverado 1500 HD, RWD
Test Description
2002 Chevrolet Silverado 1500 HD, RWDSECTION Test Description
The numbers below refer to step numbers in diagnostic procedure.
- 2
This step will make sure there are no other DTCs stored that will affect operation of glow plug system. - 3
This step will check each glow plug for an open. - 4
This step will check each Glow Plug Feed circuit for an open.
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.