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2003 Chevrolet Silverado 2500 HD 6.0L Poor Idle Quality, Misfire, MIL Lamp on
Posted to GM Driveability on 6/28/2006 25 Replies

This truck misses heavy on cyl#3 and #4. we have scoped the ignition and coils and injectors, all look normal. we swapped 2 plugs, wires, injectors(not plugged at all). To no avail i can not find out what is causing this miss at idle. It runs perfect on the hi...

25 Replies Received (View Replies)

  Related Documents & Media  2003 Chevrolet Silverado 2500 HD

 
Message Closed w/FIX

car Vehicle Data

2003 Chevrolet Silverado 2500 HD

VIN 2GCEK19U03
Engine6.0 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, MIL Lamp On
OccursAlways, Idle
Misc.Stock

Trouble Codes

P0300Multiple Misfire Detected
Message Closed w/FIX

car Vehicle Data

2003 Chevrolet Silverado 2500 HD

VIN 2GCEK19U03
Engine6.0 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, MIL Lamp On
OccursAlways, Idle
Misc.Stock

Trouble Codes

P0300Multiple Misfire Detected