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flickering headlights on 2005 Silverado

Discussion in 'GM Electrical Tech' started by countryheartkid, Oct 22, 2012.

  1. countryheartkid

    countryheartkid New Member

    I have a 2005 Silverado with headlights that flicker. I have checked the grounds and all have been cleaned and tightened (none were loose). The headlights flicker when the engine is above 2000 RPM's and pulling a hill (under a load) and also when going downhill with the truck in a lower gear, again RPM's above 2000. It is getting worse. I have a new battery (July 12'). I changed the alternater thinking it was the regulator. This made it worse. Any ideas?
  2. Curky

    Curky New Member 1000 Posts 100 Posts

  3. Pikey

    Pikey Moderator Staff Member 1000 Posts 100 Posts

    I had the exact same issue with my 05 yukon xl. New battery and new (reman) alternator. It turned out the the alternator was crap. I replaced it 6 times in one month due to voltage issues and bad bearings. I have the 160 amp bosch in my truck. I went to a S&G import parts store, they had a brand new bosch for $170. I put it in 2 weeks ago and have not had a flickering issue since. Plus my headlights are brighter. If you have a bosch model on your truck, then I suggest replacing it with a brand new one as the reman companies do a very poor job fixing them
  4. donyms

    donyms Active Member 1000 Posts 100 Posts

    Welcome to the club, it's good to have you aboard. :glasses:
  5. mfleetwood

    mfleetwood New Member 1000 Posts 100 Posts

    ***Thread moved to appropriate section of forum***
  6. SurrealOne

    SurrealOne Former Member 1000 Posts 100 Posts

    Welcome! :great:

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