85-90K, around there.

Did you find any good prices on those? The 10258881 is 51 and the 22133030 is 90 on wholesalegmpartsonline.
That was with not to much effort but a lot of places say part discontinued.

I just read a review on Amazon for the 2004 GP, AC Delco springs from Rock Auto. It said the springs added 2 inches to the height......whoops
The same numbers are listed for a GXP, so yeah not a good place to buy springs.