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Gary
Gary, ASE Certified Technician
Category: GMC
Satisfied Customers: 16640
Experience:  GCM master tech over 25 years
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Battery drain, installed new alternator and battery, still

Customer Question

Battery drain, installed new alternator and battery, still drains
JA: Have you tested the battery with a voltmeter? And can you see if it's leaking or not?
Customer: No
JA: What is the model/year of your GMC?
Customer: 04 1500
JA: Are you fixing your vehicle yourself? What have you tried so far?
Customer: New battery, new alternator
JA: Anything else you want the mechanic to know before I connect you?
Customer: Pulled the radio fuse and still drains
Submitted: 8 months ago.
Category: GMC
Expert:  Gary replied 8 months ago.

Welcome! My name is ***** ***** I will do my best to assist you with this problem.

Customer: replied 8 months ago.
Thanks
Expert:  Gary replied 8 months ago.

do you have a good multi meter on hand to test for mili amps ?

Customer: replied 8 months ago.
No I don't , I was just wondering if this may be a problem with this model that could be an easy remedy
Expert:  Gary replied 8 months ago.

if the battery s confimed good with cold cranking amps and hs NO bad cells then 99 % of these 2004 trucks when they have draws are the radio or the BCM or the gauge cluster doing the draw

usually what you can do is unplug the radio and see if it still does this if it does unplug the gauge cluster if it still draws unplug the BCM which ever one you leave unplugged and the draw stops tht is the device that is bad

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Customer: replied 8 months ago.
I did pull the radio fuse, it didn't help
Customer: replied 8 months ago.
What's the BCM?
Customer: replied 8 months ago.
Hello?
Expert:  Gary replied 8 months ago.

i am here it takes a minute to type

Customer: replied 8 months ago.
Oh ok
Customer: replied 8 months ago.
Well I gotta go
Expert:  Gary replied 8 months ago.

no you need to unplug it to be sure

the BCM

( body control module )

dont forget to rate us here

you can always get me back for FREE for any follow up any time with this question even after you rate me here at Justanswer

if you have any questions please ask as i do not get credit for my work until you rate me here at Justanswer