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Discussion Starter #1
My radio shows the Message LOC on the screen, after checking the manual I could not get into the settings to un lock it.
With the engine off I tried the run position on the ignition cylinder whiile pushing the 1 & 4 buttons, no change...
Also I read that there is Special code needed that I do not have.
Can anyone tell me how to get into the settings and then what code to use..
Gary
 

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Discussion Starter #2
I took this to the dealer and they needed to get a code off the radio and call into GM for a unlock code....
I was told that they see this every couple of months from their customers.
 

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My guess is you bought the truck used and the previous owner set the code and didn't tell you when you bought it. I had this problem with my VW but the crazy Germans program it to where it only locks if it doesn't recognize the car its in. When I replaced my battery and turned it back on, it said locked, but it recognized the car and unlocked itsself.
 
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