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  1. #1

    Default Alternator trouble?

    So this morning my truck has started up and the volt gauge would stay half between 9 and 14 which is around 11.5 and eventually kicked back up to 14, but it just started doing this today and its taking longer and longer for it to kick back up... i have a 130 amp alternator on my engine, it usually runs around 15 volts at all times, someone said voltage regulator? if not im going to have it tested tomorrow.. Thanks in advance

    2000 Chevy Silverado 2500 4x4

    6.0L v8:great: 4L80E

    2.5 in Daystar leveling keys

    285/75/16s BFG ATs on HD wheels

    Cab lights and tool box

  2. #2


    I would get your alternator checked first. when my alternator went out it did the same thing and it really sucks we it croaks and your miles away from anything and your truck quits. Been there, done that!
    If you can take it in and have it checked when your alternator is cold and hasn't been run for awhile. I took mine in while still in my truck and it showed good, bu died while I was driving to Idaho and the truck died out on the road.
    Ford has a better idea! Drive a GM!

    07 GMC Sierra Classic
    07 Honda Accord EX-L

    68 Camaro (blown)
    2011 Ford F550 V10
    I don't own this truck, I just drive it!

  3. #3
    stephan's Avatar
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    Sep 2010
    Far West, Oregon USA,
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    It could be the alternator/regulator, but it sounds like it could also be a loose ground, or batt/alt charging wire. Check all your alt connections, chassis ground, body grounds & batt cables. This is all easy & it's free compared to taking a shot at the alternator.
    1988 Chevy C-3500 2wd (no pic)
    350 c.i. 5.7 L Stock Block, 4 Bolt Mains
    L-31 Vortec Heads, Edelbrock Cam & Intake,
    Holley 650, Flowtech Headers, Magnaflow exh.
    Jet Trans 700R4, B&M Ratchet, 4:10 gears,
    3" susp. lift kit "shadetree"
    No rev limiter, No speed limiter lol

  4. #4


    Start with a digital volt meter checking voltage at the battery. I wouldn't place much stock in the dash gauge, they are pretty numb. In addition, those trucks are notorious for stepper motor problems.
    When you hear hoofbeats, look for horses not zebras.

  5. #5


    checked the battery with a voltmeter, were exact same readings as dash, so i checked all wiring connectinons, they were good, so i ended up taking the alternator to advance to be checked and it was bad, was producing only 10 v so i bought a new one, all is good now thanks for all the tips to check first everyone i appreciate it.

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