Stumbling

Asked by May 16, 2016 at 01:55 PM about the 1990 GMC Sierra 1500 C1500 SLE Extended Cab SB

Question type: Maintenance & Repair

1990 GMC Sierra 5.7, when cold everything works great, once warm you have
to feather the gas to get it going, once past the idle taking off it runs good.
Any ideas?

1 Answer

27,085

hows the fuel filter...also check for vacuum leaks...

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