I've had problems with my battery going dead after a day or two on my 2004 Silverado 2500 HD. I've performed a draw test with my multi-tester by pulling fuses, etc. But I seem to have multiple things with significant draws: radio .6 amp, instrument cluster .2 amp, Could there be a harness connection or relay of some sort that could be causing draws on multiple items?
Thanks.

 

Just went through this with my 03 suburban, is the key switch "normal"? Mine had split, kept the anti theft active, and other things. Not saying that is the problem, but something to look at. The instrument cluster, has it any issues as far as led problems? You can pull the radio fuse, if that clears the battery drain, pin point it from there.

 

Thanks kevinkpk. I did go ahead and pull the radio fuse to help with the drain. The instrument cluster has had issues, it sometimes won't come on right away when I start the truck. That's why I suspected it could be the problem. But it turns out it isn't the only one. I guess I don't know what you mean when you say your key switch split. How did you determine that? Did you put ii new one?
Thanks again.

 

Ignition switch key, inserted it, but only went in half way, but was able to start it. Jiggled it around, and was able to insert the key as it should be. Took it out, no problem, but the lock icon on the dash stayed on if I locked it, it thought I was locking the doors with key in the ignition, and I think that caused the battery to go dead.

 

You need to get yourself a set of electrical schematics, and start probing 'downstream' of those circuits which you identified as staying live.