So my GXP has been at the dealer for two days, the tech said he saw evidence of a coolant leak but couldn't find the source. GMPP told them to pressure test the system which they claim showed no evidence of a problem. Im arguing that if I saw coolant and the tech saw coolant theres a leak! They are going to retest and keep it another day. I think they are just trying to deny the claim, warranty is up in three weeks! I contend that a pressure test doesnt really test the water pump seals, especially if its cold, what about the thermostat being closed?
Service Dept. just called back. They have decided to run a coolant dye test. I feel much better, if they cant find it with that, I guess Ill just have to keep my fingers crossed