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.
2006 GMC Envoy 5.3 M, 4WDFACTORY OEM SERVICE PROCEDURE
Engine Control System - 5.3L - DTC P0136 To P0446
- DTC P0136 or P0156
- DTC P0137 or P0157
- DTC P0138 or P0158
- DTC P0140 or P0160
- DTC P0171 or P0174
- DTC P0172 or P0175
- DTC P0201-P0208
- DTC P0220
- DTC P0222
- DTC P0223
- DTC P0230
- DTC P0300 - P0308
- DTC P0315
- DTC P0325
- DTC P0326
- DTC P0327 or P0332
- DTC P0335
- DTC P0336
- DTC P0340
- DTC P0341
- DTC P0351-P0358
- DTC P0420 or P0430
- DTC P0442
- DTC P0443
- DTC P0446
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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