1996 Sierra k2500 Rotor question. help

Djpgmc5.74x4 · 07-25-2008, 08:02 AM

I have a 1996 GMC K2500 SLE 5.7L long bed,extended cab 4x4 that needs new rotors. The wheels are 8 lug. Are the rotors and hub assembly all one piece. I can not find a puller that fits the 8 lug pattern to separate the rotor from the hub. I know that if I remove the 4 bolts on the back of the assembly I can take the rotor and hub off. I've gone to AutoZone and purchased the rotors and they are separate from the hub. Any help or suggestions. I'd like to be able to do this myself if possible. First time trying to replace rotors on this truck it has 108K miles and it is due.

bradrhale · 07-25-2008, 08:18 AM

i replaced rotors on a 96 1/2 4wd without removing the hubs. shouldnt be any different. all it requires is the the 2 bolts on the caliper assembly and should come off. should use an allen wrench. 00 models went to a hex head bolt but dont know when they changed to that.

75K30 · 07-25-2008, 08:37 AM

Welcome to the site;
I see you are having slight difficulty with the removal of the rotor, and I believe your difficulty might have me a little confused.
Have you removed the entire hub / rotor assembly from the vehicle?
Either way, you will notice, and remove the factory rotor retaining push nuts from the wheel studs. Might only be two or three, and they can be a little tricky to remove. I typically destroy them when removed.
With a small wire brush clean all threaded holes free from debris and rust. There might be so much from brake dust etc, that you may not even notice that there are threaded holes. Small picks are great for this too. It is important to locate these because the next step requires that you do.
Once you have located, and cleaned these threaded holes, you must locate a couple bolts (M10 x 1.5") and insert these into the threaded holes. (Only two)
Apply torque to the bolts evenly to press the rotor from the hub.
Might require a few taps under tension to break all of the rust and such free, but it should come right off, and repacement should be pretty straight foward after this.
Good luck.

bradrhale · 07-25-2008, 08:41 AM

75,
where are these things at you are talking about?? i dont guess i remember them or have not had a problem pulling the rotors off. or are these on 8 lugs only??

75K30 · 07-25-2008, 09:04 AM

bradrhale

Are you talking about the threaded holes?
For stubborn rotors, the manuacturer has placed a couple of threaded holes in the rotor itself, for just this type of seperation. The bolt will thread through the rotor, and the end of this bolt will bottom out against the hub assembly, and should seperate the rotor from the hub.
Is it specific to 3/4 ton rotors? I am not sure, but I had a 96 single wheel 3500 at the shop the other day with a similar problem. (this one turned out to have a bad hub and bearing assembly) but rotor removal was performed this way.
I do believe that the 1/2 tons should be the same. I have seen pass cars utilizes this method of removal. I actually believe the majority of slip on, or hat style rotors can be removed this way.
Those little clips are important, and a few good whacks usually free things up, and often the bolts are not a necessary method, but for super stubborn rotors can be an efficient method of removal. Many times the holes will fill with brake dust and junk, and may never be seen.
I will see if I can post up some pics. Gotta find a 1/2 ton now to see if this is specific to one style, or if most have this style. Hmmmmm.

Djpgmc5.74x4 · 07-25-2008, 09:04 AM

75k30. i knew that you would have an answer for me. I only removed the whole assembly(hub and rotor) on the right side. I'll go take another stab at it. Thanks for the speedy reply. Great site! Thanks

Djpgmc5.74x4 · 07-25-2008, 09:07 AM

Most of the vehicles that I have worked on had the slip on type rotor so when I started this repair job, it kinda threw me for a loop. I tried using a puller and all that did was separate the front axle shaft spindle from the hub.

bradrhale · 07-25-2008, 09:09 AM

glad to hear you got some good info.
i know what you are talking about 75. never used them so i never noticed them. makes me want to go home and look at the set i have that fits absolutely nothing i own. they probably have them from what you say.

75K30 · 07-25-2008, 09:11 AM

Lets just keep our fingers crossed, and hope that it works out for you.
I am full of hot air once in a while, lol.
Again, good luck.

Djpgmc5.74x4 · 07-25-2008, 09:13 AM

Lol, I've been reading the forums for awhile, just joined and Thanks again. Off to the driveway.

07-25-2008, 08:02 AM	#1
Djpgmc5.74x4 Junior Member Join Date: Jul 2008 Location: Austin Texas Posts: 10	1996 Sierra k2500 Rotor question. help I have a 1996 GMC K2500 SLE 5.7L long bed,extended cab 4x4 that needs new rotors. The wheels are 8 lug. Are the rotors and hub assembly all one piece. I can not find a puller that fits the 8 lug pattern to separate the rotor from the hub. I know that if I remove the 4 bolts on the back of the assembly I can take the rotor and hub off. I've gone to AutoZone and purchased the rotors and they are separate from the hub. Any help or suggestions. I'd like to be able to do this myself if possible. First time trying to replace rotors on this truck it has 108K miles and it is due.

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07-25-2008, 08:18 AM	#2
bradrhale Senior Moderator Join Date: Apr 2006 Location: Texas Posts: 8,030	i replaced rotors on a 96 1/2 4wd without removing the hubs. shouldnt be any different. all it requires is the the 2 bolts on the caliper assembly and should come off. should use an allen wrench. 00 models went to a hex head bolt but dont know when they changed to that.

07-25-2008, 08:37 AM	#3
75K30 Senior Member Join Date: Jul 2006 Posts: 2,992	Welcome to the site; I see you are having slight difficulty with the removal of the rotor, and I believe your difficulty might have me a little confused. Have you removed the entire hub / rotor assembly from the vehicle? Either way, you will notice, and remove the factory rotor retaining push nuts from the wheel studs. Might only be two or three, and they can be a little tricky to remove. I typically destroy them when removed. With a small wire brush clean all threaded holes free from debris and rust. There might be so much from brake dust etc, that you may not even notice that there are threaded holes. Small picks are great for this too. It is important to locate these because the next step requires that you do. Once you have located, and cleaned these threaded holes, you must locate a couple bolts (M10 x 1.5") and insert these into the threaded holes. (Only two) Apply torque to the bolts evenly to press the rotor from the hub. Might require a few taps under tension to break all of the rust and such free, but it should come right off, and repacement should be pretty straight foward after this. Good luck.

07-25-2008, 08:41 AM	#4
bradrhale Senior Moderator Join Date: Apr 2006 Location: Texas Posts: 8,030	75, where are these things at you are talking about?? i dont guess i remember them or have not had a problem pulling the rotors off. or are these on 8 lugs only??

07-25-2008, 09:04 AM	#5
75K30 Senior Member Join Date: Jul 2006 Posts: 2,992	bradrhale Are you talking about the threaded holes? For stubborn rotors, the manuacturer has placed a couple of threaded holes in the rotor itself, for just this type of seperation. The bolt will thread through the rotor, and the end of this bolt will bottom out against the hub assembly, and should seperate the rotor from the hub. Is it specific to 3/4 ton rotors? I am not sure, but I had a 96 single wheel 3500 at the shop the other day with a similar problem. (this one turned out to have a bad hub and bearing assembly) but rotor removal was performed this way. I do believe that the 1/2 tons should be the same. I have seen pass cars utilizes this method of removal. I actually believe the majority of slip on, or hat style rotors can be removed this way. Those little clips are important, and a few good whacks usually free things up, and often the bolts are not a necessary method, but for super stubborn rotors can be an efficient method of removal. Many times the holes will fill with brake dust and junk, and may never be seen. I will see if I can post up some pics. Gotta find a 1/2 ton now to see if this is specific to one style, or if most have this style. Hmmmmm.

07-25-2008, 09:07 AM	#7
Djpgmc5.74x4 Junior Member Join Date: Jul 2008 Location: Austin Texas Posts: 10	Most of the vehicles that I have worked on had the slip on type rotor so when I started this repair job, it kinda threw me for a loop. I tried using a puller and all that did was separate the front axle shaft spindle from the hub.

07-25-2008, 09:09 AM	#8
bradrhale Senior Moderator Join Date: Apr 2006 Location: Texas Posts: 8,030	glad to hear you got some good info. i know what you are talking about 75. never used them so i never noticed them. makes me want to go home and look at the set i have that fits absolutely nothing i own. they probably have them from what you say.

07-25-2008, 09:11 AM	#9
75K30 Senior Member Join Date: Jul 2006 Posts: 2,992	Lets just keep our fingers crossed, and hope that it works out for you. I am full of hot air once in a while, lol. Again, good luck.

07-25-2008, 09:13 AM	#10
Djpgmc5.74x4 Junior Member Join Date: Jul 2008 Location: Austin Texas Posts: 10	Lol, I've been reading the forums for awhile, just joined and Thanks again. Off to the driveway.