I have a 1997 Blazer that I am troubleshooting multiple issues that appear to be vacuum related (HVAC Controls, 4WD). And the vacuum hoses appear to be original and are just about disintegrating, to the point I can't read the dimensions on all of them. The one I could see was 5/32. What other sizes will I need if I want to replace all of the vacuum hoses in the system? And about how many feet of each size?

 

So even after talking to a GM tech and calling the dealer parts department, the answer is unanimous. Nobody knows. You just have to take off the old hoses and match them up. Which is a pain because the closes auto parts store to me is 15 minutes away.

In any case, I got it done and used mostly 5/32 if anybody else is wondering.

 

about how many feet did u need? Did u also do MAP sensor vacuum line?

 

You would be better served to post your own thread than to post to this old one.

 

The time stamp on his post shows he might of been a little foggy while replying.... High hopes.........