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Where to start looking

Discussion in 'Chevy Trucks' started by CityGuy, Sep 13, 2012.

  1. CityGuy

    CityGuy PlowSite Fanatic
    Messages: 17,220

    I have a 2008 chevy crew with 6.0 gas motor. In the recent days as the sun is not up yet I have noticed that when the head lights are on(automatic on) that when I use my turn signal it seems that the lights flicker slightly. At first I thought it was my eyes but several days in a row it has done it. I checked the battery that is original and it has 12.4 volts without truck running. Anyone have any ideas on what else I may want to look at?
  2. dieselss

    dieselss PlowSite Fanatic
    Messages: 11,390

    Well,,,what's the voltage while running?? And have you cked your gnds lately? Usually when the lights flicker its either alt going bad or a gnd issue
  3. CityGuy

    CityGuy PlowSite Fanatic
    Messages: 17,220

    I will check the volts running. Is there a way to check the alt without removal of it?
  4. dieselss

    dieselss PlowSite Fanatic
    Messages: 11,390

    Yea. Load tester. But most pple don't have turn on heater or a/c on high lights etc and see what volts are at idle,,,then rev up and see if the volts go up. Need to be 14.5 + volts at higher idle
  5. peteo1

    peteo1 PlowSite.com Addict
    Messages: 1,660

    Or go to you local auto parts store. They'll test your alternator and battery for free.
  6. carkey351

    carkey351 Senior Member
    Messages: 229

    another thing to check is that you don't have any burned out lights, i.e. third brake light, tailight, etc. if they burn out they sometimes cause ground issues. the factory wiring up to the headlights is also as skinny as can be so check to see that it's not cracked....
  7. mike1316

    mike1316 Senior Member
    Messages: 155

    I have an 09 2500hd 6.0 gas and mine did the same thing. I took it to the dealer and they replace my bcm. It never throw a code.
  8. woodchuck2

    woodchuck2 Senior Member
    Messages: 304

    Check the plow connections at the stock harness. Could be a ground issue at one of these connections due to corrosion.