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2003 GMC Sierra 1500 SLE 5.3L Poor Idle Quality, Misfire, MIL Lamp on
Posted to GM Driveability on 12/5/2006 9 Replies

GM misfire diagnosis - easy right? This one has my tech stumped. The customer came in asking for a fuel pressure test as he thought he had a bad pump - he said that ever since he ran it out of gas the truck has run rough. Pressure was within spec & engine was ...

9 Replies Received (View Replies)

  Related Documents & Media  2003 GMC Sierra 1500 SLE

 
Message Closed w/FIX

car Vehicle Data

2003 GMC Sierra 1500 SLE

VIN 2GTEK19T23
Engine5.3 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, MIL Lamp On
OccursAlways, Runs Fine @ Idle After First Start Up

Trouble Codes

P0300Multiple Misfire Detected
Message Closed w/FIX

car Vehicle Data

2003 GMC Sierra 1500 SLE

VIN 2GTEK19T23
Engine5.3 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, MIL Lamp On
OccursAlways, Runs Fine @ Idle After First Start Up

Trouble Codes

P0300Multiple Misfire Detected