× 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
2003 Chevrolet Avalanche 1500 5.3L Poor Idle Quality, Misfire, MIL Lamp on
Posted to GM Driveability on 11/11/2009 25 Replies

Complaint is missing at idle, with check engine light on & flashing @ times. Scan tested with tech2 & seen #8 misfiring bad under 1200 rpm, & #7 about 1/2 misfires of #8. All other cylinders ok. Spark is excellant to cylinders(tried 2 diff plugs, coil, wires e...

25 Replies Received (View Replies)

  Related Documents & Media  2003 Chevrolet Avalanche 1500

 
Message Closed w/FIX

car Vehicle Data

2003 Chevrolet Avalanche 1500

VIN 3GNEK13T13
Engine5.3 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, MIL Lamp On
OccursIdle

Trouble Codes

P0300Multiple Misfire Detected
Message Closed w/FIX

car Vehicle Data

2003 Chevrolet Avalanche 1500

VIN 3GNEK13T13
Engine5.3 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, MIL Lamp On
OccursIdle

Trouble Codes

P0300Multiple Misfire Detected