I'm In Conn, my Blazer is in NY. Before I go NY Can anyone tell the Vacuum hose sizes I Might need to fix most under hood & 4x4 issues.(Damn the chipmunks) I'm taking a new actuator & transfer case vacuum switch with me. Is silicone better than rubber???

 

Here are a couple threads I created to help with this.

https://blazerforum.com/forum/articl...m_content=post

https://blazerforum.com/forum/article-submissions-discussions-47/underhood-vacuum-lines-3-button-nvg233-transfer-case-rpo-np1-107596/?utm_source=share-link&utm_medium=button&utm_campaign=share&utm_cont ent=post

 

Wow!!!! Christine this was incredibly helpful.. I was taking 20 feet 7/32 & 20 feet 5/32 hose, just wasn't sure if I might need anything else being in the middle of no where with the closest parts store closed on Sundays. My 92K mile 2000 Blazer is mint underneath & all the hoses are still like brand new except for the fact Chipmunks turned into a Habitrail for themselves. despite sticky traps & bait bits Thank you so very much for your help is much appreciated. Willie (toys)

 

You are very welcome.

The quality of the rubber used in these hoses was not consistent. I had to learn all about them the hard way. LOL

It is nice to know that whthaI learned could save others a bit of hassle.

 

Did GM ever upgrade the 4wd hose system? I had a 98 4wd, and the hose **** show with it leaking into the HVAC system was a nightmare! I had little success fixing it's issues. I had that puppy for 20 years, and loved it, but in the end it just had too many problems to save it, and it went to the junkyard. I just wondered if that terrible problematic hose situation was addressed before that model was discontinued?