Looking for vacume line diogram for 1986 chevy blazor S 10 4x4 2.8 engine

In most models of chevy trucks of the 1980s and 1990s follow the fuel and brake lines under drivers side door and look inside frame rail ....filter is usually mounted there

this link is for an 86 chevy k20 truck --you can also notify coachman for additional manuals or information
1986 Chevy K20 Vacuum Diagram

i think you have the year and displacement wrong.
the vin shows you what engine you have.
the engine has serial number on the side and that to shows, engine code
a 96 kicks is a G16b engine (here) and is a belt.
there are 2.0 I-4s and v6, is yours a V6?
the first kick is 1989 (1.3L and 1.6L) in usa
are you in some other country?
the G16 motor is here (in english)
the belt comes with instructions, too, in english , in uSA.
http://www.fixkick.com/t-belt/tbelt-index.html

Here's an eBay seller's page...has a LOT of Corvette parts including '86 Corvette parts. If nothing else, hit "contact seller" and send him an email asking if he knows where to acquire the parts. Good luck!
http://myworld.ebay.com/corvettemack/

no on 05 chevy the transmisson shift is control by vacume look for a vacume line that is dry rooted or has come off start at the engine first then work the way down to the transmisson. a line off or dry rotted any where in the syastem will give you a hard shift sometiimes like a hard jerking motion when
shifting.

I hope this is what your looking for...

http://media.photobucket.com/image/1986%20toyota%2022r%20vacuum%20schematic/rwdfreak/vacuum.jpg

vent actuator control has lost vacume source. check for disconnected vacume lines at actuators at blend doors.also check vacume lines in engine compartment. these small vacume lines brake easily also can be deteriated near battery due to battery acid contamination

I would check for any cracked vacume hoses going to the engine it seems you have a vacume leak.

Most vehicles have a diagram on the underside of the hood that shows the vacuum line routing. Just open your hood and look up!

Is it the 32/36 weber or the knock off 34/34?

If its the 32/36 then the only vacuum line from the carb goes to the advance on the distributor. If standing in front of engine there should be a nipple on the left side of the carb.

Then there's the vent nipple on the carb. That'll go to the charcoal canister. There should be 3 nipples on it. It'll go to the far right one. If there's nothing on the middle nipple then plug that one.