1993 GMC Van heater

Tiny
DSOLO0234
  • MEMBER
  • 1993 GMC VAN
  • V8
  • 4WD
  • AUTOMATIC
  • 75,300 MILES
When I am driving with the heat on every thing seems fine but when I come to a stop the battery gauge drops considerably and my dash lights get dim and you can hear the difference in the power of the heat blowing out. And when I take back off the gauge goes back up and the dash light go back to normal. This is my only vehicle so if anyone could help I would appreciate it. Thank You.
Friday, November 21st, 2008 AT 8:43 PM

1 Reply

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Sounds like you have a alternator losing power. I suggest getting both your alternator as well as your battery tested at a local auto part store such as AutoZone or O'Reillys. They will do the tests for free. If your engine light is on, they will also run a diagnostic test for free as well.
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Friday, November 21st, 2008 AT 9:03 PM

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