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2004 GMC Sierra 1500 5.3L Poor Idle Quality, Misfire, MIL Lamp on
Posted to GM Driveability on 3/20/2010 18 Replies

I replaced the intake manifold gaskets and the fuel pump. The pump was in spec on pressure but customer chose to replace it as a preventative repair. The intake gaskets were replaced because of suspicsion of a vac. leak and I swear I still hear it on the drive...

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  Related Documents & Media  2004 GMC Sierra 1500

 
Message Closed w/Summary

car Vehicle Data

2004 GMC Sierra 1500

VIN 1GTEK14T74
Engine5.3 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, MIL Lamp On
OccursCold, Idle

Trouble Codes

P0300Multiple Misfire Detected
Message Closed w/Summary

car Vehicle Data

2004 GMC Sierra 1500

VIN 1GTEK14T74
Engine5.3 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, MIL Lamp On
OccursCold, Idle

Trouble Codes

P0300Multiple Misfire Detected