Question about 1998 GMC Suburban

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98 Suburban: Loses electrical like a short robbing power to drive

This has happened twice, the car starts up just as it should , I'll be driving along and suddenly lose power. I notice the amp gage pegged to the neg side. The car will eventually come to a stop with the engine running but with no power to move the car, ultimately the engin ies. The first time this happened I thought the battery might be dead. After about 15~20 minutes I the was able to start right up with electrical power. It appears to be an intermittent short.. any ideas on specificly what it might be?

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  • joseph cayo Feb 12, 2012

    Definitely an electrical problem as indicated by the negative amp reading. Could be an open circuit in the alternator wiring that prevents the alternator from powering the vehicle; or it can be a short circuit taking power from the battery to ground.



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Perhaps alternator is not charging the battery properly 
Test with a voltmeter - fully charged battery should read approx. 12.8 without engine running
With engine running should read 13.8-14.2 .
Check the sparkplug wires and make sure the sparkplus are tight 
also check the two basic and very common thinks for this problem.the fuel pump and fuel filter.
if the pump is clogged and filter is dity this can when ever the fuel gets clogged ,this would make the car stall out and lose power as soon as the engine stopped sucking the fuel due to the debris .
check out this.
thanks,please do rate the solution.thank you for using fixya.keep updated.

Posted on May 30, 2009


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