'02 Blazer Cd Changer

I bought a CD CHANGER from a friend of mine who instaled a new system in his xtreme. AFTER i put it in it just says locked. it worked in his. Any help would be great.THANKS:confused:

The usual procedure is to hold the 2 and 3 preset button for approx 10 seconds or until a 3 digit code displays. Write that down.
Then hold the AM/FM button down for approx 10 seconds until another 3 digit code displays. Write that down.

Call your local GM dealer and give them those codes.

Don't post them here I won't help you with it, sometimes the dealers require proof of ownership due to theft.

They will give you the rest of the procedure to enter the new code and unlock the radio.

Worst case scenario is you will have to take it out and have the dealer send it to a ACDELCO authorized repair center to be unlocked.

But the above should get you started.

Thanks a lot.