Chevrolet Trailblazer: Powertrain

Affects Chevrolet Trailblazer · 2002 — about 64 vehicles.

The hazard

Certain 4WD vehicles were built with a range shift collar in the transmission transfer case that contains cracks. This condition could result in a complete fracture of the range shift collar and subsequent loss of vehicle forward and reverse gears, and the inability to maintain "park" position. This increases the risk of a vehicle crash resulting from unintended movement of a parked vehicle. Correction: Dealers will replace the transfer cases and update the control module calibration.

What to do

Contact your dealer; the remedy details were not included in the filing.

Critical — crash/injury risk now High — injury risk; see remedy Moderate — fix at next service Low — minor / informational