Transmission

Asked by May 21, 2017 at 06:10 PM about the 2004 Chevrolet TrailBlazer LS 4WD

Question type: Maintenance & Repair

2004 trailblazer  4x4 wont shift from 3rd to 4th was told
could be senor is that true

1 Answer

109,845

A sensor should set a check engine light, if no light doubtful it is a sensor, however these do have problems with shift solenoids just sticking and they normally won't set a code but will cause the symptom you have. A tranny shop can plug in and run separate tests on the solenoids and the TCM also internal pressures then they can tell you what it will take to fix it.

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