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.
Computerized Engine Controls (Diesel): Notes
The Diesel Electronic Control (DEC) system is used on the 6.2L Diesel engine with light duty emissions. The DEC system consists of the Electronic Control Module (ECM), Input Devices and Output Signals. The DEC system electronically controls EGR system operation, Torque Converter Clutch (TCC) engagement, cold advance, and glow plug system.
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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.