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Chevy expert
Chevy expert, ASE Certified Technician
Category: Chevy
Satisfied Customers: 10370
Experience:  30 yrs experience ase cetified tech shop owner
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2003 GMC sierra 1500: amperage..4 amps on the abs abs light

Customer Question

2003 GMC Sierra 1500HD with draining battery. I have checked for amperage draw.

I get 4 amps on the ABS fuse....and my ABS light is on. When the ABS module is disconnected...the draw goes away. I'm guessing this needs replaced.

I get 4 amp draw on LBEC2 fuse. When all door fuses and relays are pulled(2 lock relays, PDM fuse, and DDM fuse) this draw goes away. Disconneting the driver's side control module does nothing.

I get a 4 amp draw of fuse MBEC1. I have yet to find where this have not narrowed down anything.
Submitted: 6 years ago.
Category: Chevy
Expert:  Chevy expert replied 6 years ago.
yes the module nedds to be replaced , what model trk is this and what engine , so i can give you some info on the other troubles
Customer: replied 6 years ago.
Truck is a GMC 1500HD with 6.0L V8
Expert:  Chevy expert replied 6 years ago.
the power seat switches are a major trouble in these do you have power seats?
Customer: replied 6 years ago.
No power seats
Expert:  Chevy expert replied 6 years ago.

other common things are a faulty radio. instument cluster , and ignition switch

unplug theses and see if the draw goes away

Customer: replied 6 years ago.
I will give that a try and get back to you
Expert:  Chevy expert replied 6 years ago.
Customer: replied 6 years ago.
It will take some time to disconnect the igintion switch, instrument panel, and radio. Have not had that much time...but working on it.
Expert:  Chevy expert replied 6 years ago.