HomeAll RepliesRe: How to open keyless remote for my 2008 Cadillac CTS? Re: How to open keyless remote for my 2008 Cadillac CTS? Sponsored March 13, 2012 at 4:45 pm #39272 GrawdaddyParticipant There you go. The battery was probably the most expensive thing. Sponsored Subscribe to GM Authority For around-the-clock GM news coverage We'll send you one email per day with the latest GM news. It's totally free. First Name Last Name Email Address Subscribe via Email Leave this field empty if you're human: Sponsored