Difference between 2011 GMC Seirra 2500 frame and a 2008 GMC Seirra 2500 (Diesel)

[Chris Sampson]

Hopefully someone can help.   

I am in the process in doing my 2008 GMC Sierra Crew Cab 2500 HD over.  I was wanting to change the frame over and I found a frame from a 2011 GMC Sierra 2500 HD.  I am curious if they will interchange.  I know the body panels look to be the same, but I was told the rad support is different between 2008-2011.  I know the front bumper is different too but I wonder if they still mount the same.  I am assuming my LMM motor and transmission will just bolt in will it not?  I would like to have the 2011 front bumper and the hood but still on the look for it but if I need to, will my 2008 Rad Support bolt to the 2011 Frame?  I did do research and it looks like if I was to use the 2011 Rad Support the 2008 rad, Intercooler, Condenser are different.

 

I do know there is a difference in the frames between 2008 and 2011. The 2011 frame is a boxed frame and the 2008 frame is C- Channel.  I am told the 2011 frame is a better frame thou.

 

Thank you ahead of time for the help

Chris

 

Edited August 18, 2023 by Chris Sampson

[dna9656]

Check the part numbers, if they are the same the frames are the same.

[Chris Sampson]

I assume they are different frames as one is a fully boxed frame (2011) and the other is a c channeled frame (2008) 

[newdude]

4 hours ago, Chris Sampson said:

Hopefully someone can help.   

I am in the process in doing my 2008 GMC Sierra Crew Cab 2500 HD over.  I was wanting to change the frame over and I found a frame from a 2011 GMC Sierra 2500 HD.  I am curious if they will interchange.  I know the body panels look to be the same, but I was told the rad support is different between 2008-2011.  I know the front bumper is different too but I wonder if they still mount the same.  I am assuming my LMM motor and transmission will just bolt in will it not?  I would like to have the 2011 front bumper and the hood but still on the look for it but if I need to, will my 2008 Rad Support bolt to the 2011 Frame?  I did do research and it looks like if I was to use the 2011 Rad Support the 2008 rad, Intercooler, Condenser are different.

 

I do know there is a difference in the frames between 2008 and 2011. The 2011 frame is a boxed frame and the 2008 frame is C- Channel.  I am told the 2011 frame is a better frame thou.

 

Thank you ahead of time for the help

Chris

 

 

 

Frame is entirely different.  

 

2008 frame was GMT-800 with GMT-900 body.  From 1999-2010.  

 

2011 frame is GMT-900 frame which had the GMT-900 body 2011-2014, but the frame technically goes to 2019.

 

I don't think swapping to it would be as easy as you are describing.  You'd be better off with an entire 2011-2014 truck.  

[Chris Sampson]

But the body panels (cab, fenders, box) are all the same from 2008 to 2012 are the same are they not?

 

What does the GMT-800 and GMT-900 mean? 

[Chris Sampson]

Actually figured out the difference between GMT -800 &-900

 

I am wondering if I can take everything from my 08 and bolt it to the 11 frame.  The rad support, bumper, cab and box