I know I saw it But I cant find it,
I have a 2000 blazer ZR2 4.3
Problem 4 WD is not working front axle is kicking in gear box is shifting front drive shaft is not engaging I think I got it but I want to make sure I do
dose any one have a link for specs on the gear box I know I have seen it I just cant find it sry for the 4wd question

 

Trying to follow what you wrote:
the front axle is engaging or locking...so the vacuum actuator is working....is this right?

But the transfer case is not engaging the front driveshaft....? Does the 4WD buttons just flash when 4HI or 4LO is pressed and then go back to 2WD?

Could be the transfer case module or the electric actuator is not working.

As far as a link....do not have one...but Search will find them.

 

Esty can you be a bit more specific on what you remember about it. I have a ton of bookmarked 4x4 links. Are you looking for the one with the broken thrust washers and axel apart?