Dominick
Newbie
so I recently replaced my spider injector unit on my 1997 gmc 1500 with a 5.7 and suddenly have shifting problems. I drove the truck to the shop with no problems but immediately after replacing the injector unit I noticed that the truck feels like it is slipping into third and also shifts in and out of overdrive. I think it may have something to do with all the sensors I disconnected while working on the truck or a ground issue. If anyone has any idea, any help would be greatly appreciated