Question about 2003 GMC Yukon Denali

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2003 Yukon Denali

My Yukon has 40000 mi on it and I havn't had any trouble with it until the other day. I moved my truck in the garage and later tried starting it go somewhere and it was dead. Nothing, couldn't even unlock the doors to get in it. I had my a facility named Kansasland replace the battery because they thought it had a bad cell in it. It started fine until the next day when I got in it again and was dead again. I have to jump it to get it started. Last night I didn't have any problems, and again this morning it started, but real sluggish. The dealership has it right now and can't find anything wrong with it so far. Any ideas?

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  • Belto B Dec 24, 2008

    I have the same problem - it happens a least once a month for me - the truck wouldn't turn-over - but when I jump it it works like nothing was never wrong - really frustrating not knowning if your truck will start. I also had my alternator check and changed the battery to no avail.

  • amelya Jan 13, 2009

    i have 2003 changed alt, batt, and still get a dead batt. after it sits for 6,7 hrs any help ???????? 

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Had a similar problem. Check the ground wire that is right near the front drivers side tire. The clamps on those are known to corrode and have issues.

Posted on Nov 05, 2008

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I really hate to tell you this because it really isn't all that helpful in regards to fixing your problem, however it may be 100% true.

It sounds like you have a power wire, that stays hot all the time (for instance the Main-Power wire to your starter), that is shorted to ground -- Effectively draining your battery over time.

And here's the bad part. Finding exactly which wire it is that is faulty is a very long, very tedious, and very aggravating task. Some dealerships will take the vehicle in, and have 1 of 2 things happen with this problem. #1 -- They don't have a technician that is trained well enough to find the wire. Or #2 -- One of the Technicians suspects what I suspect is wrong with it, and is telling himself "I don't want to do that" and is now telling you he can't figure it out. I've seen that happen in a dealership...

Unfortunately about the only way to fix it is to spend the time and effort to track down that faulty wire and replace it, but as I said, it could potentially take a very long time and could be costly in Labor Hours if done by the Dealership if its done right. And could be very costly if a technician with poor training starts replacing all kinds of wires arbitrarily and doesn't really fix it, but still charges you.

Posted on May 16, 2008

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