Transmission question

Asked by Jun 16, 2017 at 01:41 PM about the 2003 Chevrolet TrailBlazer LT

Question type: Maintenance & Repair

When driving trans comes out of gear, I have to
turn truck off then it will go back in gear......what
could be the problem

2 Answers


The encoder motor on the transfer case has failed. This is not uncommon with GM's push button or rotary dial transfer case selectors. The gears in the encoder are worn out allowing the transfer case to slip into neutral. When you shut off the vehicle and restart. the encoder motor is cycled by the computer then put back into the range selected. eventually it will fall back into neutral though. This is more common on vehicles that are driven mostly in AWD mode. I tend to leave mine in 2HI most of the time to extend the life of the encoder.

I was also told that the transmission computer could be bad, is this the same thing that y o u are talking about.

Your Answer

Chevrolet TrailBlazer Experts

  • #1
  • #2
    Tom Demyan
  • #3
View All

Related Models For Sale

Used Chevrolet Tahoe
801 Great Deals out of 40,246 listings starting at $1,799
Used Jeep Grand Cherokee
886 Great Deals out of 72,237 listings starting at $900
Used Chevrolet Silverado 1500
2,664 Great Deals out of 158,108 listings starting at $1,850
Used GMC Envoy
46 Great Deals out of 1,802 listings starting at $1,100
Used Chevrolet TrailBlazer EXT
6 Great Deals out of 921 listings starting at $1,988
Used Ford Explorer
1,071 Great Deals out of 67,954 listings starting at $1,200
Used Chevrolet Impala
483 Great Deals out of 31,772 listings starting at $1,000
Used Dodge Durango
262 Great Deals out of 24,897 listings starting at $1,500
Used Chevrolet Camaro
371 Great Deals out of 31,504 listings starting at $3,000
Used Ford F-150
2,998 Great Deals out of 231,248 listings starting at $1,300
Used Chevrolet Blazer
4 Great Deals out of 822 listings starting at $950

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.