Hi guys.

Since I bought my Blazer, my 4wd is broken.
So, thatīs the problem: the gear reduction locks in, but my 4wd not.
Yesterday, I spent all the day under the Blazer to identify the problem.
My result: the vacuum-hose to the Transfercase was cut (I think by the previous owner).
I repaired the hose, and the transfer-case locked up.
But then I noticed that the vacuum actuator for the axle-locking get no vacuum.
I tried to retrace the hose, but it going down between the firewall an the engine and I donīt know where it ends.

So I search something like a wiring plan from an all-data-program or something else.
If anyone could help me, it would be great.
The german GM-garages know only Opel an corean Chevrolets like Matiz and such f***ing pieces of s**t. They suggest, something like a Chevrolet Blazer wouldnīt exist in Germany although my Blazer stands on their parking lot. These fools.

So please, help me.
Thanks a lot.

Greetings from Germany

 

This is all i could find hope it helps you out.

 

Thank you!! Thatīs great!

Now I looked at the last pdf, and iīve seen on the vacuum switch are three pins.
One (A) comes from the engine an delivers the vacuum.
One goes directly to the Vacumm actuator (1).
The third goes to the transfer case (C) and the venting (B) with a tee?
Correct?

I think I found my mistake.
I think, I connect the delivery-hose direct to the transfer-case and so the transfer-case can lock in, but not the axles, because they get no vacuum?
Would that work?

Thanks for your help!!!

 

Sounds possible if there is no vacuum getting to the front axle actuator it cannot engage the front axle.

 

The problem is, in east-germany, no one has an idea about american cars.
My buddys are mechanics, but without a plan itīs not easy to find out the problem.
And the pre-owners were totally idiots. they bite through the parking brake wire and such bulls**t. But my buddy had a little idea with a venting hose, but we donīt knew which hose belonged on which pin.
In the next days I will try it out.
i will report my result.

So, thanks a lot, and have a nice evening.