Hello! I have a 2000 Chevy S10 ZR2. I am having trouble getting 4wd to engage. The front drive shaft is turning when I put the truck on jack stands and push the button. There is a vacum switch under the battery that get's the vacum from the transfercase. The vacum switch does not move when 4wd is engaged. I am assuming I would be able to see it move to engage the differential. Has anybody had this issue before?

Thanks!

Jeff

 

The sticky above should help. click on upgrades and repairs, then click on the blazer page. go to page three and click on 4X4 no worky. It will help you trouble shoot the problem...........

 

Thanks, it describes my problem exactly!

 

So i fixed the issue. The vacuum plunger under the batter had a tear in it. I replaced it with one from NAPA and it works great now!

Jeff

 

where did that sticky go??

 

Im have 2001 blazer and having trouble engaging 4x4. Was reading your post but couldnt find page that you were refering to. Can you help.

Thx Ralph

 

I'm also having this same problem on my 2000 S10 pickup. could someone please post a link! THANKS!!!

 

Go to www.blazerfourms and click on DIY, I think it's on the 2nd or third page..........

 

2000 chevy 1500, push button 4x4 dosnt light up

 

Hi I have a 1999 s10 zr2 and my 4x4 is not working. When I turn on the button it clicks in the transfer case and the plunger under the battery will suck down. The drive shaft to the front will move. I have replaced the cable and gear on the passenger side of the differential idk what else could be wrong any ideas