I recently replaced my battery on my 2000 Deville because the original died out. After replacing it, I tried turning the car on and and nothing. No turn over, crank, nothing. I checked all the fuses and everything was fine. The battery seems to be charging fine. I want to make sure I try everything before I tow the car to the dealer. So any and all suggestions would be greatly appreciated. Thanks

 

Disconnect battery. Make sure battery is charged. Clean to bare metal positive and neagtive terminal connectors, use dremmel tool if necessary. Clean battery terminals. Reconnect battery and crank. Should start.

 

Thanks. I will definitely give it a try and let you know how it goes.

 

I cleaned the terminals to the bare metal and its still the same. The only difference is now the dash reads "service theft system". Is there any way to bypass this? Any help would be greatly appreciated. Thanks again.

 

Do you have another key? If so disconnect negative terminal at battery for a bout 20 minutes. reconnect and try with other key.

 

Thanks for the reply. I disconnected the terminal and used my spare key and the result was the same. Could it be any of the sensors? Is there a way to bypass the theft system all together? Thanks in advance.

 

When your key is in the ignition do you get the dash to light up? Radio to turn on? I pulled the engine in my STS and had sort of the same problem once I had it back in and tried to start it. I got some dash lights and when I turned the key, nothing! No power to anything. Dealer suggested theft system but when I had it towed they found that the main ground wire to the block wasn't fully tightened and I wasn't getting power to the front fuse box. Once they tightened it up, it fired right up in front of me and I felt like an idiot. Make sure your grounds are tight, you might have caused one to become loose when changing the battery. Make sure you have power to your front fuse box. Just a suggestion!