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2006 GMC Sierra 3500 WT 8.1L Excessive Emissions, Only at idle
Posted to GM Driveability on 8/30/2016 7 Replies

[...] compression shows #7 & #1 contribute the least [...] #3 & #5 Spark plugs carbon fouled [...] down test ranges low of 8% on #2 to highest 17% on #3 [...] compression the vacuum gauge fluctuation is 2PSI [...] front Oxygen Sensors are carbon fouled in the ...

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car Vehicle Data

2006 GMC Sierra 3500 WT

VIN 5B4MP67G66
Engine8.1 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / S E F I
EmissionsOBD-II Compliant
SymptomsExcessive Emissions, Only at Idle
OccursCold, Hot
Message Closed

car Vehicle Data

2006 GMC Sierra 3500 WT

VIN 5B4MP67G66
Engine8.1 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / S E F I
EmissionsOBD-II Compliant
SymptomsExcessive Emissions, Only at Idle
OccursCold, Hot