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Chevrolet 2003: Dan. I have a 2003 Chevy Avalanche and

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Hi Dan. I have...
Hi Dan. I have a 2003 Chevy Avalanche and I'm having some issues with a battery drain. This has been going on since I acquired the car in 2009. At first I thought it was related to winter weather but as the summer months have come around I've noticed that the drain has gotten worse. I decided to check to see if there was a drain of sorts by unhooking my battery in between trips and at night for a week. I confirmed that there was a drain as the battery cranks just fine using this method. Next, I drove the vehicle a good distance and tested the battery and alternator. Both of these tests came back with great results as well. Finally, I tested the circuits in the vehicle. I've noticed that there are a LOT of circuits that still pull power after the ignition to the vehicle have been switched all the way off. I wrote down all the circuits that maintained power. So, what would be my best course of action to fixing this problem?
Submitted: 3 years ago.Category: Chevy
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Answered in 17 minutes by:
6/15/2015
Chevy Mechanic: Gary, Chevy Technician replied 3 years ago
Gary
Gary, Chevy Technician
Category: Chevy
Satisfied Customers: 18,026
Experience: 15 years GM master tech
Verified
I am sorry your having this problemthe alternator was tested good for volts and amp's ? the battery tested good for volts and CCA ( cold cranking amps ) and for bad cells ?do you have access to a good multi meter that will read milli amps ? and draw over .50 milli amps is too much of a drawhow long will it take for the battery to be dead or very low when the truck sits ?
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