2003 Yukon won't start

If your lights are working and it is not even cranking then it sounds like the start. Get a hammer or a wrench and gently tap on the starter and have someone turn the key. Make sure you are away from any moving parts or belts when you do this. If it starts then your starter is going bad and should be replaced as soon as possible since the tapping solution may not work for long before even that will not start your vehicle.

Short to ground Inside starter solenoid. Replace the starter

ground wire at back or engine is broken maybe. happened to me.

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