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05 Escalade, High Voltage? Electrical issues/radio won't turn on

12534 Views 12 Replies 7 Participants Last post by  Cameron0588
Hey guys, hoping this happened to someone else and it's and easy fix/cheap.

So I just started my truck, let it warm up for 10-15 before driving, and then when I got to my destination, put it in park and sat for a minute. The radio/navigation won't turn on. It doesn't display anything. When I hit the power button, the backlight comes on and the time, but it won't power on. Also the drivers and passengers side doors button illumination is being weird. One minute it's fine, the next they flicker off, then back on. The voltmeter is reading higher than what I think is normal, and it's jogging between 15-16 volts. Then just as I was about to leave, the meter dropped down below 14 volts and the idle roughened up a bit. No engine or battery lights, no warning lights of any kind. 86K miles. Runs and operates fine.

Really hoping to shed some light on this issue and find a solution.

Thanks a ton in advance fellas!
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Wow guys. Overwhelming and thorough responses. I will clean and check the connections and try that first. Then have the alternator and battery tested if it persists. Any idea where to get a BCM should that be the case? Is it plug and play or will it require a Tech tool at a dealer to program and sync to my truck?

Thanks so much for the help fellas. It's much appreciated I this end.
Hey guys just wanted to follow up with you and let you know, I changed out the battery for an AC Delco right from the dealership and got rid of the Walmart battery that was in there. The battery was 15 days out of the three-year warranty. No problems since battery swap. Thanks for all the help that everyone contributed, I really appreciate it.
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