× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
2004 GMC Sierra 2500 SLE 6.0L Poor Idle Quality, Misfire
Posted to GM Driveability on 2/14/2012 13 Replies

Truck has rough idle and LTFT -12 both banks .Also has lack of power. Sometimes fuel trims will go back to normal at about -4 LTFT Drop exhaust to check for plugged cat. ok. Went for another test drive and LTFT is now +15 on both banks. MAF sensor was replaced...

13 Replies Received (View Replies)

  Related Documents & Media  2004 GMC Sierra 2500 SLE

 
Message Closed w/FIX

car Vehicle Data

2004 GMC Sierra 2500 SLE

VIN 1GTHC24U54
Engine6.0 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire
OccursUnder Load

Trouble Codes

P0101Mass Airflow Sensor Range/Performance
P0172Fuel System Too Rich (Bank 1)
P0175Fuel System Too Lean (Bank 2)
Message Closed w/FIX

car Vehicle Data

2004 GMC Sierra 2500 SLE

VIN 1GTHC24U54
Engine6.0 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire
OccursUnder Load

Trouble Codes

P0101Mass Airflow Sensor Range/Performance
P0172Fuel System Too Rich (Bank 1)
P0175Fuel System Too Lean (Bank 2)