Originally Posted by frog13
If this is a fact....we hope you took it back and advised the manager....they did charge you,right!.
I just went through all of that on Friday of last week. I haven't had the chance to pull the thermostat out and check its condition or compare the part number to what's listed on the bill. It would entail draining at least half of the brand new $25/gal. coolant from the block and radiator. This is why I asked them to do it in the first place, since they were draining it anyway for the warranteed water pump replacement. They still charged half an hour of labor ($50) plus the thermostat/gasket ($30), AND charged for the coolant ($80) and radiator flush labor ($40). I could have replaced the water pump, replaced the thermostat, and flushed the coolant myself for $200 and it would have been done correctly. I didn't argue it because I was extremely angry at the shop foreman for burning up my clutch (smelled really bad) a few minutes before when I asked that he and I take the truck for a drive to check out some vibrations in the steering wheel. I'll not be going back to this dealership ever again.
Anyway, coolant temps are consistently holding at 190.4*F once warmed up and cruising, and only vary +/-3*F while in stop & go traffic according to the temperature sensor (read with an U.Gauge). But that difference in temperature between the upper and lower radiator hose, even while idling, is very confusing. Hoping that the OP can report on whether replacing the thermostat changed anything for him.
Sorry this got off topic.