Close
QUESTIONS

RepairPal is your advocate for car care advice and guidance

Q: ran codes , showing # 3 cylinder misfire . on 2001 GMC Sierra 2500 HD

changed plugs, wires and fuel filter and still no change .any help would be grateful . thanks
Get a Repair Estimate
Guaranteed by certified locations nationwide. Learn more
RepairPal estimates are guaranteed at over 1,700 quality certified locations nationwide. Learn more
Need to check the fuel injectors. my friend had the same problem with his chevy 2500hd (2001) we pulled the injectors, cleaned them out with chem tool B12 spray and the problem went away. good luck!
Didn't find what you were looking for?