I have an 08' Pontiac Grand Prix Base model 3.8l not supercharged. I've scoured the internet looking for a new transmission for it but I'm failing to finde anything that could remotley tell me which model the transmission is. That site says it't the 4T65E while this other site says it's the 4T65E-HD or the other site has a list with the Grand Prix Base model but only up to an 03' or something like that. If anyone can please let me know what transmission I have in my car, I'd be forever grateful. Thanks for taking a look.