WendellB

Looking for a new or used cruise control, vacuum diaphragm. A engine compartment fire burned the rubber diaphragm on my 403 and I would like to replace it so my cruise control will work again. Cruise control makes the vehicle so classy.

stevengerard

What year, I have a bunch somewhere I think one from a later year like yours but I am not familiar with them after 72.

SkylinesSuck

You would probably get more of the right attention in the "parts wanted" section just FYI. It is likely the same diaphram used on 73-77 Cutlasses and isn't easy to find. Best of luck!

WendellB

Thanks for the information about redirecting my post to parts wanted.

I'm looking for one on a 1978 GMC Royale with a 403 Oldsmobile Toronado engine. I think it maybe the same one for a Cutlass.