4L60E Automatic Transmission from 2009 Trailblazer 4.2L 4WD [97,394 mi] 4902015
TRAILBLAZER 09 AT; 4.2L, 4×4. All automatic transmissions will require a new transmission cooler to be installed to keep the warranty. On all automatic transmissions, the transmission cooler must be replaced and cooler lines must be flushed to validate your warranty.