Thanks for all of the suggestions. After some conference calls between the dealership and the GM folks, the outlook is not very positive at this point. Tried to address the options in a point by point manner. Regarding the throttle body as an area of loss, the dealership tech stated that “ any loss in this area would have been detected by the coolant / dye test ie they would have seen it. The only suggestions that were made is to first follow the #2 cylinder spark plug as an area of concern, this was replaced due to damage around 6000 miles ago. The thinking is if we switch the #2 plug(new and clean) with one of the other OEM plugs on the engine (slightly worn and dirty) and run it until the reservoir empties itself again and if the coolant is somehow going into the #2 cylinder, the old dirty plug will be washed clean by the coolant. “*#%!@” looks like another couple of weeks and another couple of bills. Anyone have thoughts if this would offer any possibility of a proper indication?
They also stated that the extended cylinder compression test along with a bore scope inspection is the next step for this problem after we look at the switched spark plugs.
Getting hosed hard down here.
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