Alternator dips when I pass

Discussion in 'Chevy Suburban Forum (GMC Yukon XL)' started by backcountrycruiser, Feb 20, 2010.

  1. backcountrycruiser

    backcountrycruiser New Member

    99 4x4 suburban with 350. Tonight when I passed another vehicle (flooring it) the headlights dimmed and the amp. guage dipped to about 11 amps. After I let up on the throttle the gauge went back and the lights got bright again. Is it a sign that the alternator is about to go?
  2. Joeairforce

    Joeairforce Epic Member 5+ Years 100 Posts

    Could be.......
  3. Rockstar 100 Posts

    hi i would say your belt is slipping under a load. check the belt.
  4. Muddflap

    Muddflap Member

    Could be that your alternator is on it's way out or the belt is slipping under the load. Have you pulled the load many times before and this being the first time ever having this problem?
  5. backcountrycruiser

    backcountrycruiser New Member

    Yes this is the first time. The belt is due for a replacement. It is in rough condition. I didnt hear any squeal or anything, but I dont supose that is too unusual.

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