battery keeps draining?

2001 GMC YUKON
200,000 MILES • 5.1L • V8 • 2WD • AUTOMATIC
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BERNIE GARRISON
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  • 5 POSTS
Once I cut off the motor battery drains, even after a new battery replacement.
Jan 26, 2023 at 8:48 PM
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STEVE W.
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 15,146 POSTS
Sounds like you have a large parasitic draw. You can try some of these:

https://www.2carpros.com/articles/car-battery-dead-overnight

This video is on a Ford but the principles for finding the draw are the same:

https://www.youtube.com/watch?v=6xFo_oHFF48

Attached are some of the wiring diagrams showing the circuits from the fuses, also don't overlook things that may have been changed on the truck in the recent past, added lights, stereo, amps, alarms and other aftermarket items can be a cause as rapidly as the OEM parts. GM has had an issue of power drain through a bad component in the instrument panel but usually the draw isn't that fast.
Jan 26, 2023 at 11:56 PM
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BERNIE GARRISON
  • MEMBER
  • 5 POSTS
now the vehicle won't start.
Jan 27, 2023 at 11:03 AM (Merged)