found these two posts for you. http://www.grandprixforums.net/p1810...cuit-5118.html
P1860 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat
it is possible to change the solenoids in the side cover with out fully removing the trans, you need to remove the d/s axle and then drop the sub frame on the d/s a bit as well. saw a vid on youtube who did it this way, (of course i cant find it now) of a guy who had it all broken down and apart, its best to change the harness as well.