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International Automotive Technicians Network
2003 GMC Sierra 1500 4.8L Poor Idle Quality
Posted to GM Driveability on 1/8/2009 7 Replies

At 101000 miles the plugs and wires were replaced as part of maintenance. The vehicle has no codes stored at all. It runs very smoothly down the road, and never misses. Shows no missfires. The vehicle had a fuel pump replaced at 101900 miles because it would d...

7 Replies Received (View Replies)

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Message Closed w/FIX

car Vehicle Data

2003 GMC Sierra 1500

VIN 1GTEC14V83
Engine4.8 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality
OccursIdle
Message Closed w/FIX

car Vehicle Data

2003 GMC Sierra 1500

VIN 1GTEC14V83
Engine4.8 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality
OccursIdle