I have a 2000 blazer 4door 4x4. I am pretty sure my transfer case is shot. It doesn't engage makes a bad grinding noise and the bottom drain plug was dry leaked out tail shaft. I found a few at the local junk yard. My question is what do i have to look for to make sure i get one that fits? Ie rpo codes or numbers on case? I know there are 3 and 4 switch but there is no switch in the blazer at the junk yard. thanks for your help

 

NP233 is 3 button, or NP236 is 4 button.
Your Tag should be on the case, just get another one with same tag.
NP231 not offered in 2000.

 

Verno thanks alot greatly appreciated

 

Well just went out to look an my tag is not on my transfer case lloks like it rotted off

 

Well if you have NP233, this is 3 button, or NP236 is 4 button.
How many buttons ya got in your dash?
no problem just find one that has a tag.

 

hes right an alluminum case is 233, magnesium with big blue autotrac fluid sticker on tailshaft is 236