Review on 🔧 Dorman 600-903 Transfer Case Shift Motor for Compatible Car Models by Alex Tinker

I purchased this part to replace a failed OEM transfer case encoder motor on my 2005 Trailblazer. The OEM transfer case motor successfully shifted to 2HI and A4WD but would not engage when 4HI or 4LO was selected. The swap only took about 20-30 minutes with a 13mm head and an extension. I used a jack and a couple of jacks to raise the TB for easy access to the transfer case motor location, but a couple of ramps would work just as well. This is probably one of the easiest DIY projects I've made. on my Trailblazer as it is a direct bolt on replacement and easily accessible under the car. The Dorman transfer case motor feels very solid and well built and I have no doubt that it will at least match if not exceed the OEM part it replaced. A NOTICE. Be sure to check the number of contacts on the transfer case motor. Connect before ordering. GM used 5 pin and 7 pin versions on these cars and the easiest way to check is to just crawl under the car and look. In my case I used a 7 pin connector which is more of a rectangular shape and a 5 pin connector which is oval. You can easily disconnect and check the connection by counting the pins. 5 Pole Version - Dorman 600-904 Transfer Case Motor.