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2003 GMC Yukon XL 1500 SLT 5.3L Misfire
misfire cyl 2 at idle only off idle no miss fuel pressure 48 psi flow good swapped injectors and coils with no help vacuum steady machine shop vacuum tested valves and cylinder said no problems fuel trims 4 while misfiring any other help would be great
FIX posted 12/10/2009
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Message Closed w/FIX
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| VIN | 3GKFK16Z43 |
| Engine | 5.3 L / 8 cyl / FLEX |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | Misfire |
| Occurs | Idle |
Trouble Codes
| P0300 | Multiple Misfire Detected |
Message Closed w/FIX
Vehicle Data
2003 GMC Yukon XL 1500 SLT
| VIN | 3GKFK16Z43 |
| Engine | 5.3 L / 8 cyl / FLEX |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | Misfire |
| Occurs | Idle |
Trouble Codes
| P0300 | Multiple Misfire Detected |
7 Replies Received
7 Replies Received
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