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2006 GMC Sierra 1500 WT 4.8L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on, sluggish
Posted to GM Driveability on 1/14/2009 12 Replies

Customer complains of rough idle, sluggish, cel on. Above listed codes are confirmed. Misfire counters are very high on cyls. # 1,3,5,7, very low on #2,4,6,8.. HC slightly high O2 high at tailpipe, C0 low. Can enrich to get O2 to go high but at idle, O2 at .03...

12 Replies Received (View Replies)

  Related Documents & Media  2006 GMC Sierra 1500 WT

 
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car Vehicle Data

2006 GMC Sierra 1500 WT

VIN 3GTEC14V76
Engine4.8 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / multi port
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on, Sluggish
OccursUnder Load, Idle, Intermittently
Misc.Factory Stock

Trouble Codes

P0131Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage
P0171Fuel System Too Lean (Bank 1)
P0300Multiple Misfire Detected
Message Closed w/FIX

car Vehicle Data

2006 GMC Sierra 1500 WT

VIN 3GTEC14V76
Engine4.8 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / multi port
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on, Sluggish
OccursUnder Load, Idle, Intermittently
Misc.Factory Stock

Trouble Codes

P0131Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage
P0171Fuel System Too Lean (Bank 1)
P0300Multiple Misfire Detected