Question about 2003 Chevrolet Silverado 1500

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Battery drain overnight 2003 chevy silverado

2003chevy pickup silverado , has a drain in the 15 amp rado fuse. they say it is suppose to go to slep after 1 hour. THis is an intermittent problem. does not always go dead. On my 3 rd battery in less than 6 years. Is the radio tied into the BCM to be draining it.

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  • Chevrolet Master
  • 2,448 Answers

This is a tough question but it sounds like you understand .
You posted it in 2009
I have a 96 s-10 blazer and know of the electrical problems ware one thing is related to another thing that no one would thing had any kind of relationship with the other but they do.
You have a vehicle in the years that they build junk no telling Chevy did

Posted on Mar 05, 2015

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6 Suggested Answers

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Posted on Jan 02, 2017

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mosthated357
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SOURCE: 1996 Chevy Blazer battery draining/won't start

What normally you have to look for is that your belt is running properly because your car might be running a lot more off the battery and not so much of f the alternator, but normally if the alternators bad it will drain the battery even if the cars not running.. Yes your first thing you would want to do is check the wiring and al that just because thats cheap and easy but most likley you wanna get the altenator tested...you can get that done at advance auto.. please rate me if you get a chance and if you have any other questions just let me know ill check up on your problem..

Thanks,
Steve

Posted on Jan 03, 2009

  • 14036 Answers

SOURCE: I have a 2001 chevy blazer that has a short that

BATTERY VOLTAGE CAN DRAIN THROUGH STARTER RELAY OR BAD DIODE IN THE ALTERNATOR.I WOULD REPLACE THE STARTER RELAY.I AM LOOKING AT A ELECTRICAL DIAGRAM.YOU HAVE A 40 AMP IGNITION FUSE THAT FEED THE STARTER RELAY.IF STARTER RELAY HAS A SHORT IN IT.IT COULD DRAIN THE BATTERY.

Posted on Sep 12, 2009

  • 2 Answers

SOURCE: I have a 2000 chevy metro 4 cyl 1.3 the vehicle

thats a good question. very hard problem to fix. i had a 2005 colorado i went through 4 batteries in 3 years. chevy could not find problem. they said i had a drain. never did find it sold vechicle.

Posted on Feb 25, 2009

  • 396 Answers

SOURCE: 2003 Chevy Express 2500, runs GReatbut battery drains dead 2days

Have the alternator checked. An open diode will drain the battery

Posted on Jan 30, 2010

  • 167 Answers

SOURCE: My 03 Silverado has parasitic battery drain. VOM

Disconnect the auxiliary power cable from the under-hood distribution center that runs to the anti-lock brake controller. Remove the ignition relay from this distribution center (this will isolate/eliminate/indicate the problem as the ignition switch). Unplug any GPS add-on device, and any radar detector, stereo amplifier add-on, I-pod, trailer brake controller add-on, anything that did not come on the truck from the factory. These can be frustrating.

Posted on Feb 13, 2010

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