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2003 GMC Yukon XL 1500 SLT 5.3L Poor Idle Quality, MIL Lamp on
Posted to GM Driveability on 12/14/2006 11 Replies

This car came in with lean codes for both banks and a MAF sensor code. The sensor was clearly bad and was [...] MAF sensor code does not return, however the lean codes do. The car is running very lean. The long term fuel trim is at 25%. The fuel pressure is go...

11 Replies Received (View Replies)

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car Vehicle Data

2003 GMC Yukon XL 1500 SLT

VIN 3GKFK16Z23
Engine5.3 L / 8 cyl / FLEX
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, MIL Lamp On
Message Closed w/FIX

car Vehicle Data

2003 GMC Yukon XL 1500 SLT

VIN 3GKFK16Z23
Engine5.3 L / 8 cyl / FLEX
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, MIL Lamp On