I have a 1998 Chevy Balzer 4x4 and all at the same time my 4 wheel drive, my heat & AC venting & my temp control stoped working. My 4 wheel light lights but dose not engage, my heat & ac venting blowes half out the defrosters and half out the top ac vents, and the temp control aways blows out cold dose this sound like a Vacuum Resivoir problem.

Thanks BOB-D1

 

*Moved to '2nd Gen Tech'. The 'New Member' section is only for introducing yourself and your vehicle.*

 

I just worked on some rotten vacuum lines I found by the power brake booster they were mostly 7/32nds and 5/32nds there are also check valves in line there I think the vacuum reservoir is in drivers side fender at least that is were the rotten one hooked into could not really tell I could just feel with left hand but check in that area to see if they are toast