2001 blazer goes into 4 wheel by itself. Light on button stays on 2 hi if i slow down it will go back to 2 wheel but after a few minutes it goes back to try 4 wheel. I changed the tccm but now im thinking its the actuator under the battery because it seems like it doesnt release all the way but i really dont know for sure. Is that possible??

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• 2 Answers

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Posted on Jan 02, 2017

SOURCE: how to change 4 wd motor(actuator) 1997 s10

Before changing the actuator check the vacuum lines at the vacuum switch on the left side of the transer case if they are wet with transmission fluid the the switch is bad and that will prevent 4wd from engaging.

Posted on Jan 15, 2009

SOURCE: 1996 blazer wont go into 4 wheel drive

Had the same problem I replaced all vacuum lines this fixed the problem

Posted on Jan 26, 2009

Juan Rivera

• 172 Answers

SOURCE: 4 lo working, 4 hi stopped working , A4WD never worked

Hi my name is Juan and I do own a trailblazer with the same year 2002 and I read the problem you have let me try to help you Have you try to shift to 4hi with your transmission in neutral ? the transmission needs to be in neutral in order to shift the transfer case to 4hi and the vehicle needs to be completely stooped also is your service 4wd light on?? if the light is on your transfer case needs service and it can be as simple as the switch inside your car or a solenoid that has not been detected by the computer

Posted on Mar 30, 2009

SOURCE: Blazer stuck in 4 wheel high

I had the same solution with 2005 blazer......dont know how but this worked...........removed the courtesy lifgt fuse for approx. 10 minutes....put fuse back in and voila..able to shift out of 4 wheel drive

Posted on Apr 20, 2009

SOURCE: air bag light stays on

check the fuses and wiring in the fuse box and the relay ,either that or the abs pump has a problem.

Posted on May 15, 2009