i have a 2007 chevy avalanche an i took out the old battery an put a new one in an now my radio ,dvd nav system dont wont it want come on how do i reset it thank

 

i have a 2007 chevy avalanche an i took out the old battery an put a new one in an now my radio ,dvd nav system dont wont it want come on how do i reset it thank

 

i have a 2007 chevy avalanche an i took out the old battery an put a new one in an now my radio ,dvd nav system dont wont it want come on how do i reset it thank

 

i have a 2007 chevy avalanche an i took out the old battery an put a new one in an now my radio ,dvd nav system dont wont it want come on how do i reset it thank

 

what do you mean won't come on?? as in it wont turn on at all or its locked?