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 3:57 pm #39271 lupowellParticipant Just a word to all that offered help. I used a very thin knife blade, inserted lightly all around the case. Batteries replaced with ease, problem solved. Total cost $7.00. Caddy dealer wanted much more. Thanks foir all your help. 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