Question about 2003 Chevrolet TrailBlazer
I can not get it back to 2WD it flashes and stays light at 4HI
If you go to You Tube Video & watch Wayne at
Real Fixes Real Fast--- he will show you the problem,
& how to replace the Transfer Encoder Motor
Posted on Apr 01, 2014
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Posted on Jan 02, 2017
Most common problem is the vacuum diaphragm that is so inconviently mounted UNDER the battery tray.The cable that locks in the front diff is attached to it and vacuum pulls it in/out.
Posted on Dec 23, 2008
It is somewhat Normal Depending on how Loud the Clunking is. This is a Common Complaint on the Chevy 4x4's. I have verified this through the Dealerships here in Oklahoma and they all say the Same thing But, I am with you, They should go into 4x4 without that Clunk for as much as we pay for them.
Posted on Jan 26, 2009
I have a 2002 chevy trailblazer 4x4 control light not working. when trying to switch from 2wd to 4wd nothing happens. no ligth no engaging of the drive
Posted on Jan 28, 2009
your problem sounds like either the transfer case control module located where you hear the clicking sound, or the actuator on the transfer case itself.
try unplugging the transfer case control module and then plug it back in, try engaging 4wd again (make sure your in neutral, coasting at 1-2 mph might help as well) if it still doesn't work check the actuator itself to see if the actuator is trying to engage. if the actuator is trying to engage but doesn't, take the actuator out and check it for wear or damage. if the actuator seems fine and it responds to the buttons when pressed i'd go after the transfer case control module as the culprit. ran into that a few times on those s-10's. 3 out of 4 that i've seen were fixed with a new tccm. 1 of the 4 needed an actuator, check your local junk yard for a working tccm or actuator.
hope this helps!
Posted on Feb 17, 2009
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