Brent R

How long is the truck and have you checked the rear driveshaft/ u joints or if you have a 2 piece shaft with a carrier bearing could be that too.

Yeah if you can spin it by hand it should be disengaged I'd say

If I'm not mistaken that has a drive by cable throttle body correct? If so I believe the TPS should be at 0 because of the IAC solenoid, I could be wrong but I had a 2005 4.3 with a 5 speed for a while and messed around with it quite often.

I wanted to put this information out there because I couldn't really find much out there for it. I'm currently swapping the cabs on my truck and had many questions that I had to figure out on my own and I'm hoping this can help anyone later on. The first question I had was the cut outs on the cab themselves and the floor of the cab is stamped with all of the pieces that need to be cut out for the transmission and the manual transfer case. The firewall has a indent for the center hole for the clutch master cylinder and that comes out to about 2 and a half inch hole saw you'll need. On my old cab there's also a 3rd bolt hole bracket that isn't on the "new" cab that has to be cut off and welded onto the new cab. Also in my case there is a clutch safety switch that needs to be pressed for the truck to start, come to find out the brake light switch, clutch safety switch, and parking brake switch are one harness that's plugged in on top of the gauge cluster. I'm about to be setting the cab back onto the frame of the truck in the next day or two, I'm also going to post a few pictures of these soon. If anyone has any questions about this swap I'd gladly answer because not many people have talked much about it

I want to get the one piece driveshaft mainly because i cant keep a support bearing in the truck it seems like they fail prematurely as well as i just started having a thud in the driveline after replacing my u joints and support bearing. I believe its coming from the support bearing rubber moving around and hitting on the cage of the bearing. With fabrication im not sure i know a guy that did this with his crew cab long box truck thats where i got the idea from.

Well here's my dilemma, I've got a 2007 Silverado 2500hd 4x4 with a 5 speed and a 6.0. It's a ext. cab long box and it's a got a 2 piece steel shaft. I know the 2015 2500hd trucks that are a double cab long box truck are 158" wheelbase, my truck is a 157.5" wheelbase. I'm just about positive that that shaft will work because I've heard of people doing it. My main concern is will I twist this driveshaft up because I like doing burnouts (dumping the clutch). Just not sure if it will hold up or not.