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  1. #1
    gorilla03's Avatar
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    off topic: truck question

    alright, i gotta 2000 gmc sonoma v6 4.3l, and im having battery issues, about a couple weeks ago i was having trouble starting my truck here in the cold weather, so i had gotten it tested and found out it was junk lol...so just last week i had gotten a new battery for it...here's my problem yesterday it was cold (around 20*) i go to start it and it cranks over slow, i mean slow...so i get to my destination and i go to start it again, cranks over even slower, then starts like normal...but when i get home and want to move it, it just clicks, nothing will start....i put the battery on the charger start it up and drive around town to charge the battery, well this morning, it does the same thing cranking over slowly...when the truck is running it reads 14.2v....what could be the problem? i unhooked all the accesories that were hooked up..

    is there maybe a ground connection that's loose?

    could it be the alternator that's going?

    any help would be greatly appreciated


  2. #2

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    gorilla i pass on to you the mys10.com , it is a home from when im not here ,

    most likely a fualty battery , poor connections , or loose wires ,


    mys10.com

    they be able 2 help ya , my friends there are like a family kinda like here

  3. #3
    Banned User
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    Have your alternator tested as well, and double check all the battery cable connections. GM has a history with the side post terminals on the double positive lead.
    Not sure if your truck has it, but it drove me nuts on mine.

  4. #4
    Well with the output voltage running 14.2 I'd Guess your new battery is junk?

  5. #5
    Happily Self-Employed WFO's Avatar
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    Static voltage on a good battery should be 12.8-13.2V. Del is right, check the connections to the battery. I drive only GM, but their cables suck. Make sure its not corroded into the insulation of the cable. Also have a shop check the starter draw amps and alternator output. Even though it is charging, it may have a bad diode that could discharge the battery when its not running.

  6. #6
    THE OFFICAL SUPERDUTY!!!!!! superduty's Avatar
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    yup WFO knows what he is talk about -been there done that i use to have a 95 s-10 blazer

  7. #7

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    start the truck up and then remove the battery see if it dies , if it does then your altanator is messed up , or the wireing is , there are those junk new batteries , and you always get your money back becuase you can say you got another one becuase it was an emergency

  8. #8

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    my dime never really had any electracal issues just a bad fuel pump , oil and tranny lines and thats it , 197,000 miles

  9. #9
    Happily Self-Employed WFO's Avatar
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    I run a shop and deal with this kinda krap all day.

  10. #10
    Happily Self-Employed WFO's Avatar
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    Quote Originally Posted by 97sltx1050 View Post
    start the truck up and then remove the battery see if it dies , if it does then your altanator is messed up , or the wireing is , there are those junk new batteries , and you always get your money back becuase you can say you got another one becuase it was an emergency
    Please do not do that... thats ole skool diagnostics. The alternator will full field and go to 100amps (or more). 96-newer OBD II computers run on a 5v reference and are very sensitive to voltage spikes. In other words...

    you could burn up your PCM by running it without the cables connected.

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