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Marty, European Car Expert
Category: UK Car
Satisfied Customers: 401
Experience:  ASE & Bosch Certified Master Tech. Over 30 years experience.
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I write from italy, trailblazer ltz old 2002 engine 4.2,

Customer Question

JA: Hello. What do you want help with?
Customer: i write from italy
JA: What is the make/model/year of your car?
Customer: trailblazer ltz old 2002 engine 4.2
JA: How many miles are on the car? Is it an automatic or a manual transmission?
Customer: 186.000 automatic
JA: Are you fixing your Trailblazer yourself? What have you tried so far?
Customer: on moment please
JA: Anything else you want the mechanic to know before I connect you?
Customer: change the transfer case shift
Submitted: 11 days ago.
Category: UK Car
Expert:  david craig replied 11 days ago.

Hi Im David, thanks for visiting the site. you want to replace the transfer case shift actuator?

Customer: replied 11 days ago.
i have ha change transfer case
Expert:  david craig replied 11 days ago.

ok, standby please

Customer: replied 11 days ago.
trailblazer It shifts into 4High and when I slow down it goes into 4Low by itself
Customer: replied 11 days ago.
The 4wd indicator lights up
Expert:  david craig replied 11 days ago.

ok. you may only need to replace the encode motor or shift motor

Customer: replied 11 days ago.
but i don't touch nothing.
Trailblazer seems to be braked.
Normally stopped trailblazer I put the change in neutral
Under the car I feel the transmission moves.
When he finished step drive and it's ok.
Expert:  david craig replied 11 days ago.

thats why is not the entire transfer case. attached are the instructions for the shift encoder motor removel

Expert:  david craig replied 11 days ago.

I have to get to my shop and will be back on in a while.

Customer: replied 11 days ago.
I had powered the engine but did not place it in 2 hi.
Should i put it in 2hi and disassemble it and reassemble it?I when I use the 2 hi 2 switch I have car etc i feel the motor moves properly.The problem is that even if I do not move the car switch does it all by myself some times.As if plugging in from 4wd alone and the car seems to be braking.Do what I wrote to you beforeDid I think about TCCM?
Customer: replied 11 days ago.
I've CHANGED the Transfer Case Shift MOTOR
Customer: replied 11 days ago.
encode motor or shift motor ARE DIFFERENT ITEMS?
Expert:  john -aka eauto replied 11 days ago.

New expert here what are we trying to get done here?

Customer: replied 11 days ago.
Dear *****MY CAR:
I have trailblazer ltz old 2002 4wd automatic 4.2 liter line.MY PROBLEM:
Not touching any command lights up 4wd inspection light
Sometimes even though I do not move the auto 4wd switch, 4wd inspection lights up.
The feeling I have is as if you were using the 4wd and the car seems to hold back fatigue.
When this car is stopped I use the gearbox and position it in neutral.
I hear under the car the transmission moves as if it disengages 4wd.
After this procedure the car does not labor is free.
Sometimes it lights up 4wd inspection light but car does not seem to workI've already changed the
Transfer Case Shift Motor
When I use the switch to insert 4wd hi and so on
I feel that the transfer case shift engine moves properly.I've read that many trailblazer have had problems with
Transfer Case Control Module?I await your instructions