Thread: 1997 and 1998 grandprix

For the most part.. Different PCMs but motor is the same as well as all the suspension and such (in which case, everything up until 03) Trans is a bit different though. believe 97 still used the 4T60-HD while 98 and up they used a 4T65-HD.. Also, while on the subject of transmissions, up until 02 the trans is interchangeable. After 03 they started changing valvebodies and oil pumps so they won't work on older GP's

if its a GTP it had the 4t65e-hd too. only the 97 GT and SE got the 4t60e.