1993 190e 2.3L, 2002 GMC Sierra Denali Quadrasteer
My heat quit working last year - tested it down to the switchover valve. Took the glovebox and right vent out, and I got the heat working by rapping on the electro-vacuum switchover valve unit in there. It must get "stuck".. Lasts for a few days, and I'm back to hitting it. Summer came, so didn't mind it not working for the past few months.... Now that cold months are right around the corner, does anyone have any tips on how to get this sucker out? I can't seem to wrestle it out. It wiggles some, but is it strapped in? What's this module above it with a 5/8" rubber hose going into it? I don't want to break any vacuum lines. I've searched everywhere, but apparently no one has done a walkthrough yet.