my water pump is leaking how do i change it out
The internet in great - - - you wonder how they (whoever) can load so much info ! SO just Google :change water pump - 1989 cadillac deville and you'll get many sites with step-by-step instructions.
Pull your belts off and the fan, clutch assembly if there is one. Undo those eight or so bolts that hold the pump on and swap it for a new one. Drain the coolant first or you'll have a mess on your hands. You don't always have to remove the radiator but sometimes that gives you more clearance to work with.