Coolant Leaks From Water Pump and Radiator on Cadillac Seville SLS

The water pump and/or the plastic side tanks on the radiator may leak causing a loss of coolant. The engine may overheat due to coolant loss. Continued coolant loss after external leaks have been repaired could indicate a blown head gasket.

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Average mileage: 89,946 (10,000–150,000)
11 model years affected: 1994, 1995, 1996, 1997, more1998, 1999, 2000, 2001, 2002, 2003, 2004
24 people reported this problem
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Viewing 1 - 12 of 12 problem details
Just bought car - a week ago. didn't notice any problems with it when test drive was taken. Car is sls 1999 cadilac 4 door. Very low miles - car body/trim is in excellent condition. No warranty on car - as car is over 10 years old per auto sales place. Noticed on Sunday - car indicator - says coolant level low, so I added 1/2 gallon. Got another warning three days later ( thursday ) check coolant level - again put more coolant in. Doesnt appear to be leaking on the ground nor is there water droplets coming out the exhaust, noticed car, doesn't want to start right away. Have car scheduled to go into a trusted dealership for tests. What kind of leak is this? and how much to repair? ball park figure is ok too.
I also have leak comming from waterpump im going to fix it myself..Is there anything out of the odrinary that i should know.
coolant leaks from top passager side and only leaks when car is truned off replaced the hose and put some radiator stop leak and didn't work still trying to find anthor solution besides putting a new radiator in.
2000 Cadillac Seville SLS 87,000 mi,
Coolant leaks yet mechanic did a pressure test and nothing was leaking. SO they replaced a hose of some sort and the whole water pump. A month later same thing. Water pump still leaking though replaced as well as coolant. I'm Taking to Cadillac. My conclusion don't trust anyone to work on a cadillac except a Cadillac dealer. Repair shops only bandaid the problems causing unneeded parts and labor, having to go somewhere else later and pay again.
2001 Cadillac Seville SLS 110,000 mi,
loss of coolant - sudden and complete
2003 Cadillac Seville SLS 95,000 mi,
the coolant tank had a crack in it, and had to replace the tank 3-4 months ago.
1999 Cadillac Seville SLS 150,000 mi,
air ride on right side went out, powerstearing is leaking and the collant and radiator leks.
leaking from radiator overflow tank.
2000 Cadillac Seville SLS 86,567 mi,
The hose is leaking coolant
coolant light remains on, tests have been done to see if there was a leak.