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  1. #1

    Default Voltmeter and Fuel Gauge Wagging!!! Shop Is Confused!

    Hi everyone I'm new to the forum and just recently bought a 2000 blue x-cab 4 door z71 silverado LT with the 5.3 Vortec. After a few days of driving it I ran into a serious issue. I had it almost die on me and run rough for a few seconds in a parking lot upon start up and therfore took it to napa where they diagnosed the battery was low on cca so i replaced it. Directly after replacing it the voltmeter began to wag when driving it from 13 to 16 volts. Once that happened my shifts got really sloppy and my tow/haul mode stopped working. I then went back and re-replaced the battery thinking it was shorting out internally (no luck) So then i replaced the altenator (no luck) I took it to a shop and they said the multifunction switch was bad (knew that when i bought it) replaced it and... no luck. So at this point im stumped. It doesn't always have the two gauges wag (or shake if you will), i drove it for three days with no problem but they still do it sometime (also tow/haul still won't come on) Any help would be in-valuble!

    Thanks, DacMan

  2. #2
    Sr. Engineer
    Join Date
    Dec 2011
    Location
    11-22-boogie woogie avenue
    Posts
    308

    Default

    For it to show that much over charge would thick alternator. Or gauge is wrong... test alt.. and battery charge with meter .
    RESIDENT NUT.....MY CLAIM TO FAME .....

  3. #3

    Default

    [QUOTE=dipstick;473792]For it to show that much over charge would thick alternator. Or gauge is wrong... test alt.. and battery charge with

    Both Checked out by the shop i took it too. I just discovered one of the tow/haul mode had a broken wire, but it was contained within one of the wire holdowns so i dont think it was shorting out through anything.

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