rear disks for '99 Tahoe

[bwp]

Would anybody owning a 1999&up 1/2ton Silverado, 2wheel steering or 2000 & up Tahoe with a jc5 < 7200lb gvwr please measure your axle housing flange bolt pattern for me? My 1999 bolt pattern is 4 bolts in a 2.75" x 3.625" rectangle with an outline which has about a 5/16"convex bump on the long demensions of the axle housing flange outline.

 

I've looked around for decent rear brakes from Wilwood, Brembo, Baer, and others but there's only a good selection if you have a newer vehicle. I just saw a picture of a 1999 Silverado where the flange outline was a simple rectangle and it seem that if the bolt patterns were the same I could easily modify my axle housing and bolt on the GM rear disk/parking brake assembly from the newer vehicles.

 

The axle shafts have the same GM part # for 1999 & 2000 Tahoes, which suggests that the offset distance from the housing flange face to the wheel mounting face of the axle is the same. If some has their rear end torn apart, please send me this measurement too.

 

a thousand thanks to everyone who takes the time to do this.

[99-2door]

That GM part number is the same for 99 and 2000 because of the 2000 Z-71 old body style 4 door Tahoes. The NBS and OBS axles are not the same.

[bwp]

looks like the jc5 4 wheel disk rpo code & vin T 5.3l engine code I gave my local parts dealer got me the wrong number for the 2000.

 

please decipher "NBS" & "OBS" for me.

[Wingnut]

NBS = New Body Style = 99 and up.

 

OBS = Old Body Style = 88-99 model years.

[robsawatsky]

NBS = New Body Style = 99 and up.

 

OBS = Old Body Style = 88-99 model years.

Except for the SUVs, which the previous body style went from 92 - 99.

 

Oh, and the "HD" pickup models which came out in 2001.

 

Oh, and some extended cab 1500 variants which stayed in production until 99.

 

Oh, and some "heavy duty" 2500 and 3500 models which stayed in production until 00.

 

Be very careful with parts catalogues for the 99-01 model years for GM/Chev pickups because of this - many mistakes.

[Wingnut]

Oh...I know all about confusion with the body styles, unfortunately, the confusion USUALLY isn't mine.

 

My 92 is OBS, but it was the first year for the SUVs, the pickups changed in 88.

 

Not to mention the fact that the S-10 was called a Blazer too...Mine is a full size.

 

Gives me all kinds of trouble getting parts...I have actually had a few parts places tell me that it's an S-10, and I'm mistaken about what it is I just drove up in.

 

I have to take them outside, and they say "Oh...It's a Tahoe"...And I say: "Yeah, if you spell 'Tahoe'... B-L-A-Z-E-R".

 

Tards.

[bwp]

thanks for all the clarification but can we get back to my original post?

 

I'll trade a Whipple autorotor 3"dia drive pulley for the housing flange dimensions & offset from a rpo code jc5 & newer half-ton rear axle housing. it came from my 95 Suburban which now runs at 8lb boost.