Question about 1998 GMC Sierra

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I have intermittent starting problems with my 1998 GMC Sierra. It will rev up as per usual but then the revs die off and you have to leave it for half an hour as no matter how many times you try it, it won't catch. My battery is six months old.

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  • Peter Stearns
    Peter Stearns May 11, 2010

    You say it starts sometimes? Under what conditions? Cool? Warm? After having a rest?

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  • 194 Answers

If you are sure the battery is good (6 months old doesnt matter, it may in fact be bad, ESPECIALLY if its a delco or duralast or some other low quality line) and the car slow cranks and then must sit before attempting again, you almost certainly have high resistance somewhere. Usually on GMs its bad sidepost bolts, or bad battery cables (under the insulation white corrosion and crude rot and infect the copper causing resistance) clean and tighten all cables. Starter may also have internal resistance that is the beginning of a total failure. CHECK BATTERY 1ST THOUGH! 90% of slow cranking problems are bad batteries, or starters thatwere damaged by being cranked too long and often with a bad battery (Yes, thats very bad for the starter!)

Posted on Sep 12, 2009

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