02 GMC 2500hd diff bracket Bushings

Brandon18 · January 28, 2023

I’m hoping someone on here can help me out. I have a 2002 2500hd 4x4, I did a 2wd to 4wd conversion and the last piece of the puzzle I need is the bushing in the frame for the front diff bracket. My local dealer gave me two gm bushings number 15962664, but after going to install them I realize the two different holes in the frame are different sizes. That bushings they gave me, one fit the rear mounting hole but is too big for the front hole. The dealer and any parts stores are no help to finding a source to get this bushing. So

im looking for a part number of the bushing that I need. I’ve attached pictures to

help explain.
thanks

Niners 365 · January 28, 2023

Your post is a bit confusing, but I understand you now basically have a 4x4. I looked up on rock auto.com, they list several type of bushings. Your asking about one in the frame, I am assuming it the control arm mount bushing. I attached pick of rock auto's listing for those, I recommend ac Delco.

This listing is for 2002 2500 dueamax deisel, but those are usuallyan an HD frame. So they would fit any HD frame.

Brandon18 · February 18, 2023

What you have posted is control arm

Bushings. I’m looking for the front diff bracket bushings. The two bushings in the picture. I got this from energy suspension but i cannot find a bushing kit to fit a 2002 2500HD, only 2007 and newer.

mjm-1957 · February 19, 2023

The parts catalog lists two different part numbers for those bushings-15962663 and 15962664. I assume one is for the front hole in the chassis and the other is the rear. No dimensions are given but the pictures look like what your looking for.

Niners 365 · March 9, 2023

We're you able to get the bushings you were looking for? It very well could mean you might have to fabricate, or find same make n model in junk yard to get em..

davester · March 10, 2023

From doing this conversion myself with my '04 Sierra 3500, from talking with multiple dealers, those 2 bushings are not considered servicable by GM, as they are bonded to the frame. GM's idea is that you buy a new frame if those bushings need replacement.

When I did the job, I got the bushings out of my parts truck by using a 1/4" bit in an electric drill, and drilling right at the edge between the bushing and the metal tube it's in. Go all the way through to the other side, then keep the drill spinning, and allow it to walk all the way around the bushing. Once all the way around, pull the drill out and push the bushing through. Note, the tube and bushing is slightly tapered.

I did this about 8 years ago, and they've stayed in place and work fine in their new home.

Since then, I recall coming across some company which made urethane or poly bushings for these things, but IDR the company name.

GMC4ever · July 1

Have same issue but its an already 4x4 2500 2002HD. Called gm to see about part numbers for the bushings and he cant even see the bushings in his catalog, bracket he is seeing has the bushings as a part of the bracket and of course its discontinued. carparts.com is showing 2 different size bushings for that part. Gonna ask local mechanics on best way to get the old ones out of the frame. Then we'll see what happens my old sierra has 300k miles so alot of the bushings are going (if not already gone---looking at you rear shackle)

davester · July 4

To remove the bushings from the frame is easy, use a smaller drill, maybe 3/16" or so, drill right at the edge of the bushing, right next to the metal, until you go all the way through, then let the drill bit grab the rubber and walk itself around the hole. Once it goes all the way around, pull it out, then punch the bushing out. Note, the holes are slightly tapered, so punch them out the right direction (I forget which way they are tapered).