Dorman 600-901 Transfer Case Motor Compatible with Select Cadillac / Chevrolet / GMC Models

The OEM transfer case motors on S-10 blazers have a design flaw that allows grime and water to enter and eventually cause them to malfunction. This prevents you from switching from Auto 4wd, 2wd, 4wd hi and 4wd low. This part replaces the oem motor and also has sealant that prevents the same thing from happening again. This installed easily and is working perfectly. Note, if you haven't replaced one of these before, read the included instructions before beginning. The motor is set to the neutral position so you need to put your selector in neutral before removing the old motor and installing this one. If you can't, there's an alternate procedure to follow.

So long term reliability (which seems to be peoples gripe) is yet to be determined. But this exact same Dorman unit would have cost me $330-350 at any local auto parts retailer here in AK. Got to me in 2 days with Amazon Prime for much less than 1/2 the cost. Dealer unit (which admittedly has bearing support on the gear vs bronze bushing, and a bit better build appearance) would have cost 3.5 times as much.The unit took 1 hour to install (don't pull the driveshaft, at least don't on a K2500 truck) though you do have to drop the tranny support crossbar a few inches just on one end to work it into position. A 15mm wratcheting wrench for one bolt will really come in handy. Doesn't come with a new seal, so you got to get one from the dealer, or re-use yours. After installing this I realized that although mine had finally totally failed, likely it had not been correctly applying the auto 4wd correctly for even longer. I'm incredibly satisfied with the result for the money and time invested at the moment, and even if it lasts only a couple years, I'll still be happy.

I bought one of these in January 2016 for my 2000 Yukon 5.3L and it worked fine until January 2022 - so I bought another one - which is working fine. The devil you know is better than the devil you don’t, no way this vehicle will go six more years.

I thought my encoder motor was the issue, so I replaced it. The gear select switch after replacing this part proceeded to only blink in the gear selected, sometimes saying the TC was in 4wd (while it was in neutral), sometimes it would shut off the switch, and overall act erratically. I eventually found the broken/damaged wires which was the actual problem, and even after they were fixed it proceeded to show the same symptoms but in slightly different patterns. I was about ready to lose my mind until I mounted my old crusty encoder motor back on. The old motor worked perfectly, and had this encoder motor done the same I would've saved a huge amount of time. This is on an NVG246 transfer case for a 2002 2500HD (really in a '97 k1500 behind an LQ4 6.0L). I hope I never have this sort of issue with Dorman products again and will go with a different brand encoder motor in the future. P.S. It took replacing the prop shaft speed sensors, TCCM and new Dorman select switch to figure this out too, front axle actuator and switch were new last year and were not the issue. If you value your time and money I do not recommend this product and hope this is helpful to others.

Direct replacement. Transfer case would it shift properly or go into 4 low. Replaced assembly and unit works as designed.

It works

I had issues shifting into 2-high after going into 4-low or 4-high. Sometimes it would take a few minutes toggling between them until my old transfer case motor finally got it into 2-high. This was a direct replacement for my 1999 silverado LS with a 5.3. Took about an hour to install and fixed my issue! Ive only had it for a day but im very happy with it and the price.

Although I am not a fan of Dorman, I did buy this for my 2002 Chevy Avalanche 5.3 4x4 as the factory one was very slow and sometimes not working. It was a simple install by pulling the front driveshaft out and removing 3 15mm bolts. Now my truck goes into 4x4 VERY FAST! I should of bought this years ago! Just a note though, it does not come with a new gasket but that is reusable.

Fit perfect, have to drop drives haft to put it in. Works good!

Worked great fixed the problem very happy

This did not fix my problem. My original transfer case would engage into all gears properly but wouldn’t fully engage as the gears inside were worn out. Installed this one, it will not go into 4hi, only 4lo or auto4wd. When using this weekend on a forest road it completely stopped working and gave me service 4Wd error. Want to return but can’t leave the transfer case with nothing attached while waiting for a replacement.

piece posée

not sure what type of warranty but 4x4 quit and keeps blowing fuse