My Tahoes security light is flashing and it's a no crank no start. I replaced the pass lock sensor and still didn't work. The Tahoe was sitting for about 1 month with the battery disconnected and I charged it up and turned the key over and the truck started right up. Drove it around for 4-5 hours, shutting it off and starting it over and over. Then after about an hour it did the same no crank no start with sercurity light flashing again. Got a new lock cylinder but nothing again. Do you think it is the BCM?
My car has 208000 miles.
My car has an automatic transmission.
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