Issues with heating and a/c since changing out the battery in my 2000 Yukon Denali

[DeBoz]

I recently replaced the battery and changed out the head unit in my 2000 Yukon Denali..Upon doing this, the a/c no longer comes on and the blend door actuator will not switch the vents from floor to defrost..Anyone ever have this happen to them? The battery I put in is a yellow top Optima and the head unit is an Alpine.. I might add that the heater control unit in the dash below the cd player does not light up when the a/c button is depressed..Everything worked fine before, it's got me stumped..

Any insight would be greatly appreciated..

 

[OmarR]

Try disconnecting and re-connecting the battery one more time.

 

[DeBoz]

I've tried disconnecting the battery a few separate times with no luck..I'll try one more time and see though..Thanks

 

[PavementPounder]

going to need a reporgram from a dealer.

 

[DeBoz]

I was thinking that might be the case..