May 4, 200916 yr For some reason, the truck is losing coolant and yet the engine doesn't overheat. I haven't driven it more than 25 miles one way. What could the problem be? It does release water out the exhaust at times. I hear a squealing sound when it first starts up. Temp gage never goes above 1/4. When it is low on coolant it tends to make a trashing sound?? And you can hear a gurgling sound when you start it up. I know it could be several things" head gasket intake gasket freeze plug thermostat seals I can't see any visible leaks however.
May 4, 200916 yr Our 1992 Suburban with 196k did the same. It was a head gasket replacement. Not so bad when you consider age and mileage.
May 5, 200916 yr Have the system pressure tested before you do anything else. it's very likely that you do have a head gasket leak if it's finding its way into the exhaust, but a pressure test will at least rule out an external leak that's less involved to fix.
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