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2004 GMC Sierra 3500 6.6L Poor Idle Quality
Posted to GM Driveability on 1/25/2010 6 Replies

We are at a loss on this, have spent hours tracing wiring. Suspect the FICM, but is a pricey part to replace being unsure. Has anyone run across this before, or know a way to test the FICM? The truck runs fine for 10 mins or so, then check engine light comes o...

6 Replies Received (View Replies)

  Related Documents & Media  2004 GMC Sierra 3500

 
Message Closed w/FIX

car Vehicle Data

2004 GMC Sierra 3500

VIN 1GTHK33254
Engine6.6 L / 8 cyl / DIESEL
Trans5-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality
OccursAlways
Misc.Crew Cab

Trouble Codes

P0208Fuel Injector 8 Control Circuit Malfunction
P2149Injector Group 2 Supply Circuit Open Load
Message Closed w/FIX

car Vehicle Data

2004 GMC Sierra 3500

VIN 1GTHK33254
Engine6.6 L / 8 cyl / DIESEL
Trans5-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality
OccursAlways
Misc.Crew Cab

Trouble Codes

P0208Fuel Injector 8 Control Circuit Malfunction
P2149Injector Group 2 Supply Circuit Open Load