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2003 Chevrolet Express 2500 5.3L Poor Idle Quality, Misfire
Posted to GM Driveability on 3/14/2005 2 Replies

Truck came in with multiple misfires, mostly 1,8. Also MIL worked sometimes. Found TSB for wiring problem near l/f upper control arm. Repaired 4 wires that the convelute tubing wore through the ecm wiring, that got inj 1, inj 8 and the MIL working properly. No...

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  Related Documents & Media  2003 Chevrolet Express 2500

 
Message Closed w/FIX

car Vehicle Data

2003 Chevrolet Express 2500

VIN 1GCFG25TX3
Engine5.3 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / efi
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire
OccursAlways

Trouble Codes

P0200Electronic Throttle Control System - Position
P0300Multiple Misfire Detected
Message Closed w/FIX

car Vehicle Data

2003 Chevrolet Express 2500

VIN 1GCFG25TX3
Engine5.3 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / efi
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire
OccursAlways

Trouble Codes

P0200Electronic Throttle Control System - Position
P0300Multiple Misfire Detected