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2003 GMC Envoy XL SLE 4.2L Poor Idle Quality, Misfire, MIL Lamp on
This truck came in with the check engine light on with a p0306. At first customer said he wanted a tune up but realized that the misfire should be checked first. I swapped coils and plugs and miss remained on #6. Put a vacuum gauge on it and had a nice steady ...
FIX posted 1/30/2010
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Message Closed w/FIX
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25 Replies Received
Related Documents & Media | VIN | 1GKES16S63 |
| Engine | 4.2 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Idle Quality, Misfire, MIL Lamp On |
| Occurs | Always |
Trouble Codes
| P0306 | Cylinder 6 Misfire Detected |
Message Closed w/FIX
Vehicle Data
2003 GMC Envoy XL SLE
| VIN | 1GKES16S63 |
| Engine | 4.2 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Idle Quality, Misfire, MIL Lamp On |
| Occurs | Always |
Trouble Codes
| P0306 | Cylinder 6 Misfire Detected |
Video