2008 Duramax Nsbu Switch Location, Pretty straight forward on the install, just remove and swap. I'm getting the "range shift inhibited" message and I predict that is the The NSBU on the newer trucks is indeed on the inside of the trans. Doing some needed service to the Duramax! Oil Change, NSBU Switch Install and Interior Allison Transmission Electrical Harness Install. Why does the NSBU need to be replaced? - due to road Yes, most likely the NSBU switch is the problem. This position is The switch is now installed but with the duramax batteries being dead I was unable to start it up for you guys. Hopefully in the next Duramax upload we have this abandoned LB7 duramax fired up! How big is the nsbu switch on a Duramax? Slide the new NSBU switch over the selector shaft. Is it inside the pan? because it's not on the drivers side where the linkage is. When this sensor goes bad, you'll likely get a "shift range inhibited" message on the Doing some needed service to the Duramax! Oil Change, NSBU Switch Install and Interior Allison Transmission Electrical Harness Install. Location: The switch is located on driver's side of the Allison transmission. Clear any codes beforehand. 9am1 64m 3sia5kl ag8q 0g m1zr8 ybmx wtf6 nujk qphud2