four wheel drive problem - Blazer Forum - Chevy Blazer Forums

Go Back   Blazer Forum - Chevy Blazer Forums > Mechanical & Maintenance > Steering, Suspension & Drivetrain

Closed Thread
LinkBack Thread Tools Search this Thread
Old 01-06-2010, 12:37 PM
New Member
Join Date: Jan 2010
Posts: 7
petethepig24 is on a distinguished road
Default four wheel drive problem

i have a weird problem with mt four wheel drive, i push the button, i hear the click in the right side, so i know the module works and i hear the tranfer case shift(both into hi and lo) but it doesnt engage, some one told me it could be a vacuum switch, but before i change parts i figured i ask you guys...any ideas? thanks in advance
Old 01-06-2010, 12:42 PM
nj4x4blaze's Avatar
Blazer Forum 2009 Ride of the Year Winner
2001 Chevrolet Blazer
Join Date: Aug 2005
Location: North Jersey
Posts: 3,068
nj4x4blaze has a spectacular aura aboutnj4x4blaze has a spectacular aura about
Send a message via AIM to nj4x4blaze

Sounds like the vacuum switch is getting stuck. Just remove it and clean it out. The switch is located on your transfer case and you'll see 3 hoses going to it.

Click the image to open in full size.
Btw thanks to Kyle for the above picture. I'm currently using this to clean out my vacuum switch.

And if you are still having problems, then remove your battery tray and check the Vacuum Actuator, they are known to go bad as well.
Dave- 01 blazer 4x4, 6" Superlift Kit,2" Body Lift,15x8 on 32's and 20"x9" on 33's,New Jersey

Last edited by nj4x4blaze; 01-06-2010 at 12:45 PM.
Old 01-11-2010, 08:13 PM
Join Date: Jan 2010
Posts: 1
ssfligg is on a distinguished road

My 2004 Blazer was not going into 4 Hi, i traced the vacuum lines and jiggled some wires and now it works. I found the vaccuum line in your diagram, line B, which you have vented to atmosphere. This line is sucking in air, like a working vaccuum in all modes, 2wd, 4 low and 4 hi. That does not seem right and I was wondering if it was normal.
Closed Thread

Similar Threads
Thread Thread Starter Forum Replies Last Post
four wheel drive problem gml New Member Area 4 01-03-2013 11:02 PM
Four wheel drive wiring problem gmoney30 Full Size K5 Tech 5 01-19-2010 10:49 PM
high four wheel drive problem chevy98 Steering, Suspension & Drivetrain 11 04-02-2009 02:41 PM
four wheel drive hub's not locking in myronhntr80 1st Gen S-series (1983-1994) Tech 10 12-07-2006 02:06 AM
four wheel drive not engaging?'86 s-10 missu General Tech Help 1 03-15-2006 01:36 AM

1994, 2000, actuator, blazer, chevy, drive, engage, guys, k5, located, mechanical, problems, vacuum, wheel, wont

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


All times are GMT -5. The time now is 11:02 AM.