Where is the vss located on a 1989 chevy k1500 ?

SOURCE: where is the transmission modulator

If it has TH400 Transmission, its mounted L/H rear just above pan.
Looks about 2" Dia with hose in centre.

SOURCE: will a 1989 kblazer transmission fit a 1993 k1500

If you are asking will the transmission will bolt up to your engine the short answer is yes however you may have to modifly the transmission depending on a number of factors the transmission in your 93 could be the electronic shift the one in the 89 might be manuel **** but you can check that out before you put it in.

SOURCE: how does my 4x4 push button locker work in my 1989

That depends a lot on how your truck is equipped. GM uses several different 4 wheel systems including AWD, Part-Time 4WD, Full-Time 4WD, and ON-Demand AWD. Then there is another version used on some trucks that is a combination of 4WD and On Demand AWD. - it gets a little confusing but each system as slightly different charachteristics.

Genericly speaking, if you have the push-buttons on your dash that say "4-HI", "4-LO", and "2HI" and/or Auto-4WD , the transfer case has an electronicly-controlled stepper motor which shifts the transfer case into the selected mode. An electric solenoid/actuator then engages/disengages the front differential for 2-Wheel or 4-Wheel modes. One push of the button and it shifts the transfer case and engages the front differential.

That's much easier than the old days when you had to stop the truck, get out (Sometimes in the middle of a big mud hole) and lock the front hubs then get back in and play with the lever in the floor to get the transfer case to shift into the desired mode.

SOURCE: how to change power steering

there r two hoses for high pressure hose u will need either a 5/8 & or a 19mm flare hut wrench (tubing hose wrench)for low pressure hose use side cutter pliers to cut two clamps off at either end of hose, will need new low pressure hose and two clamps. don't forget to re-fill with proper p/s fluid

SOURCE: How to change 4x4 actuators

I had this problem in the middle of nowhere. On the passenger side of the front differential, there is a "thermal Actuator" that screws into the diff. This is what engages the front axle. I replaced mine and 4 wheel works again. Don't know about a second. Be sure to remove the wire connector before removal or your wiring connector.
Leonard Jones
El Mirage, Arizona