only getting 2 miles to the gallon

Asked by Mar 13, 2017 at 01:08 PM about the 2002 GMC Sierra 2500HD

Question type: Maintenance & Repair

im only getting 2 miles to the gallon and traveling
with a fifth wheel

1 Answer

69,395

I can only guess since you give no other information but I suspect a leaking fuel injector. Diesel or gas? Lots of black smoke out the exhaust?

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