John-if you read my earlier post you will see i've already fixed the coolant/intake problem.

I replaced the tps but disconnecting the battery didn't clear the codes. Auto zone will not clear them because of a law suit. Ses light is still on but the car seems to be running ok. I'm going to ask at work tomorrow if the mechanic can do it for me.

I wondered the same thing when I looked at mine.

That tube goes to the bottom of the PCV Valve on the Upper Intake Manifold.

I just had the same problem. Did you take the Intake Air Control Valve off when you cleaned up the throttle body.

See https://www.gmforum.com/t279955/

I havn't had time to post back. Got the codes cleared & everything works! Now if my AC worked!

Look out. These symptoms are possibly caused by a failed intake manifold gasket--common problem in the Bonnevilles. Coolant passes through the head to intake manifold gasket to control the temperature of the intake manifold. Failed gasket may allow coolant to be sucked into a cylinder during the intake stroke. The possibility exists of a hydraulic lock; cranking the engine while a cylinder is full of coolant will cause it (at best) not to crank, and at worst it will cause serious damage.

There are service bulletins out for some years of the Bonneville for intake manifold gasket failures. I have done mine several times, and the current fix seems to be holding. I used a Victor Reinz gasket set the last time, with grey RTV at the corners of the seal at each end of the block.

The collapsed hoses, loss of coolant symptoms could be consistent with either an intake manifold gasket failure, or a head gasket failure. Take a sample of the coolant from the suspect engine to a radiator shop and have it tested for exhaust gas products. If no exhuast gas is present in the coolant, it is probably an intake manifold gasket failure. If exhaust gases present, it is probably a head gasket.

Been there done that.

MAF sensor is not going to have anything to do with a failed intake gasket leak. Plus, this thread almost 4 years old. Please refrain from replying to old threads.