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454GMCSub 2/18/2012
1998 GMC K2500 Suburban SLE 8 Cyl 7.4L - Engine
Why wont my truck start?
I first noticed the truck was dead.
I thought I had left the interior lights on so I jumped it and it started right up.
I drove it for about an hour and then got home and shut it off.
I tried to restart it about three minutes later and the dash lights barely came on, flickerd and then shut off and engine didnt start.
It did sound like it tried to start, but then died and no power whatsoever.
I jumped it again and I had to wait about one minute and it slowly cranked and then fired.
I again drove it and then let it idle or about two hours and then shut it off, and then tried to restart and same thing happened before.
Tried again to start and then dash lights went on and then flickered turned off and died. No power.
2 Answers
  • CVO
    CVO 2/18/2012
    A battery 3/4 charge is 12.5 volts.
    A discharge battery is 11.75 volts.
    Local auto parts stores will test this vehicle charging system with their mobile analyzer for free of charge. They will determine accurately the cause of this problem.
  • Bill
    Bill 2/18/2012
    Sounds like either battery or your battery cable post clamps are corroded, dirty or loose, or all three.

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