Consumer complaints about DexCool in GM Engines

Consumer complaints about DexCool in GM Engines: "Justin of Little Elm TX (1/25/03):
I purchased a 1998 Chevrolet Tahoe from Classic Chevrolet with 45k miles. I also purchased a 2-year, 20k extended warranty. About 3-4k miles out of warranty, my truck began to overheat. I took it to a mechanic who checked the cooling system and replaced the water pump, flushed the system, and pressure tested it for leaks, refilling it with the Dexcool orange coolant GM demands you use. At 74k miles, I am now told I have to replace the intake gasket, for $650. This is a widespread problem and I believe my engine may have damage due to the coolant leaking into the engine.
Thousands of these incidents have happened and GM denies any problem exists."