Hey im kinda new on this forum cause i just got my blazer for a winter car/trail car. It's a 2000 4dr. Well i bought it from my aunt and she says the 4x4 worked before she sold it to me well i can't get it to engage when i put it in Neutral and push 4hi, 4low, auto4x4. it just blinks and eventually goes back to 2wd. when i push the buttons you can here something like a gear(idk?) move under the car maybe an actuator on the transfer case. idk a whole lot about 4x4. But i did check the vacum pump under the batery tray it has vacum and i checked all the lines they seem to be good. So im kinda puzzled, i've been considering taking it somewhere but my luck its something simple. So if you guys could give me any sugestions or things to check out. let me know?
Thanks in advance, Nick

 

what does it do on the fly,when your driving down the road you should be able to click into 4hi not 4lo for 4 lo you should be in neutral they sell a kit called posi-lok i installed on my 84 s-10 blazer
and its awesome it completly eliminates the need for vaccum acctuator which is crap on s-10 blazer someday all blazers will have posi-lok

 

I dont have 4x4 at all when im driving or not all three options just blink. =/

 

Bump any help is really apriciated

 

4wd issues have been discussed to great detail in many threads on this forum. Lets start by how many buttons are on your dash.

Check out the Tech Article section for some helpful threads on the NV233 transfer case (3-button). Search for NV233 (3-button) or NV236 (4-button) for threads discussing them.

 

thanks ill see what i can come up with

 

Im just going to take it to a shop because i don't have a clue...

 

well if you have the money take it to the shop,but just the thought of some dirty man putting his hands all over my truck.....no thank you