The transmission in my 2001 chevy blazer recently went out. There is no reverse and you have to let off the gas and then ease back on to shift into the next gear. It is an automatic 4x4. We recently found a transmission for it and my husband intends to put it in but has found out that if you disconnect the battery it will mess up teh radio. We’re trying to find the code we need so that he can install the transmission. Do you know where we can find this? Thanks, Leiann