This is topic not ford tech but need help in forum Tech Talk at Northern California Ford Owners  .


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Posted by 4.6 EATIN GM'S (Member # 1633) on :
 
my 03 gmc sierra's volt gauge go's past 19 on the gauge like it's pegged. the truck died a few times today when i would slow down (like when i was coming to a stop)
my question is could it be the altenator or what else could it be.ive never seen something like this before. [Confused]

by the way it normally sits right a little past 14 on the gauge just like my other truck

[ March 09, 2008, 04:56 AM: Message edited by: 4.6 EATIN GM'S ]
 
Posted by 1bdpone (Member # 6708) on :
 
The voltage regulator (built into the alternator) is bad. You need to replace your alternator. You may also need to replace your battery if it has been overcharged for an extended period of time.
 
Posted by 925GT50 (Member # 2683) on :
 
Id get the alternator bench tested and then go from there. Im not to sure though hence Ive yet to have any problems with mine.


Good luck keep posted on the outcome.

[ March 09, 2008, 07:40 PM: Message edited by: 925GT50 ]
 
Posted by badazlx (Member # 4899) on :
 
my 91 exploder hade the same problem and it turned out to be the conection on the batt terminals. replaced the terminals and it was fixed.
 
Posted by 4.6 EATIN GM'S (Member # 1633) on :
 
well i have an extra altenator layin aound so ill swap them out tommarow after work and see if that fix's it.should only take me 20 minutes or so
 
Posted by 4.6 EATIN GM'S (Member # 1633) on :
 
well i swapped altenators and it still did it.so i took the altenator i pulled out of the truck and the battery down to autozone and the alt passed and the battery didnt.so im putting the new battery in today and see if it helps.
 




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