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Original Post
my truck has 24000 miles, exhaust fluid light came on. GM says I used the wrong fluid which is matching numbers with GM OE. Told me it would cost $300.00 to drain the fluid. I'm a certified GM Auto Tech. Drained the fluid myself and a day later the sensor cracked, which was nothing to do with draining the fluid. Called GM and would give me no help. They sided with the dealership. It cost me $600.00 to fix.