I had a '98 Suburban and if power is removed to the radio it must have a 4 digit security code entered after power is restored before it will work. This was a theft measure at the time. I had to contact the dealer who gave me the code after I replaced my two batteries the first time. I wrote the code on the front of the owners manual and kept it in the Suburban for the next time I needed it. Ed
Ed
KM4STL
'06 Sierra LBZ 4x4 Crew SB, Titan 52 gallon fuel tank, TTT/Schefenacker Mirrors
'98 Suburban, 245,000 - sold 7-4-06