Re: Monsoon Stereo Question
We run into this all the time in the body shop.
We connect a jumper battery to the cables in order to keep the system powered up, while changing the battery carefully, & keeping all the codes safe in the radio and computer.
We also have a 12 volt source that does the same by plugging it into the cigar lighter.
If all that fails, you have to call a Chevrolet dealer and the service or parts departments can get you the code.