Well if you have the electronic climate controll I think the vent doors may be electronic.. I will see what I can come up with tomarrow.. there maybe 2 seperate problems between the a/c and the cruise but we'll see.. I will try to get some more info at work..LAB said:Cold or Hot the blower only exits from defroster and lower ducts, and I have the Climate Control option. It started last year and after I drove a few miles all was fine and the Cruise Control always worked. Now the air is coming out as I wrote above and now the cruise control does not work(never did this until the other day). A corvette Tech asked me if the cruise was working when I asked what was wrong and he advised me that the Vaccum controler was BAD (really sure) I have talked with other C4 owners and several said that there was only a leak.( I did not want to tell them that I did not know where the Controller was) and he said the controller was several hundred dollars plus labor. OUCH! Just did the water pump opti-spark, plug wires etc on the wifes TA. Trying to fix this my self. Thanks Louis
Could be at either side, on my L98 it at the back Driver side Fuel rail (near it)Originally posted by LAB ...<br>
Is the check valve the one on the manifold on the passenger side on the intake at the end of the intake manifold? And is there a difference because I have the LT4??
REALLY? GM DOESN'T Make them anymore!!arichard said:You have to bend your body in ways you thought never possible to replace it, but it is possible. It is above the accel pedal (a square black box with a bunch of multi-colored vaccum tubes coming out the top). Mine went out this spring (having the same symptoms as you) and I just replaced it a couple of weeks ago. Apparently this is a very common problem on the 1996's. GM does not make it anymore, so you have to find one. I got mine through Just Corvettes(a salvage yard) for 150. Took me several hours and a sore back to get the job done, but it works like a charm now. Hope this helps.