Question about 2002 GMC Sierra

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The battery has 12.9 volts, but when I turn the key everything goes dead. In a few minutes I hear two clicks under the dash. The power comes back, but goes out again as soon as I turn the key. ????

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Sounds like a loose /dirty connection to to your batterys posts. Remove the connection clean the posts and connectors then re assemble. If it is still doing it charge the battery and also check the starte motor connections. good luck

Posted on Nov 08, 2010

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Everything is dead


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Sounds like a bad connection on the battery , check the earth cable on the battery and the one that earths the engine to the bodywork (at the bottom of the engine) if there worn or frayed it can stop the engine from starting. all the best Scott

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Wont start, just clicking when i turn the key why?


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My battery is dead and when i open the door i hear a clicking sound in the dash and noise coming out of seatbelt. i charged the battery then it goes dead in a hour and clicking noise comes back


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2008 Hummer occasionally will not start. Completely randon when this occurs. Can sometimes wait a few minutes and it starts and sometimes much longer. This has basically been happenning since new. Dealer...


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