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  1. Truck only starts when cold

    S10 / Sonoma
    I have a 2002 GMC Sonoma 4.3 Vortec automatic ext. cab. I'm having issues with the truck. When the truck is cold it'll start to crank then wont, but after the second time it'll crank flawlessly. but when I park it after driving and go into the store for 15 minutes or something. It won't crank...
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