98~05 Blazer brake upgrade! DONE!



Aug 28, 2009
South Buffalo / West seneca NY
This upgrade made a HUGE difference for me. My old hardware was only 2 years old on the calipers, rotators, and pads.
i am going to have my alignment looked at in a few weeks. But for now it is parked till it gets nicer out.

I just wanted to post an easy to do, bolt-on upgrade for our g-bodies braking system. This can be done with all GM parts, in just a few hours, and is a worthwhile upgrade for anyone looking to upgrade to a dual caliper braking system.
The thickness of the blazer rotator was 1.20" and the G-body was 1.0” the diameter is 10.5 in for the G-body and 10.78 for the blazer

To upgrade stock G-body brakes, you will be using 1998 ~ 2005 blazer / Jimmy Knuckles (2WD ONLY!)

Blazers allso came stock with 14" rims so stock seel rims will work

The 4wd might work but you would have to install the lower ball joint upside down. but that would not work any how because the 4wd ball joints are not pressed in there bolted in. and the 2wd and G-body ball joints are not made to install like that and would fall out, when you hit a bump... here is 2 pics comparing the two




In my case I used spacers on my GTA rims to move them out so that is the only added setep here that you can ignore.

Here is where you start! Ugly rusty brakes wave bye bye :wavey:

Make sure to put a jack 1" under the lower arm to catch it, during removal. I just use a hamer to hit the lower control arm if it pops out good! If not, time to use the pickle fork.

Here is the knuckle installed. I recommend using a paper thin coat of RTV on the setting surface of the dust cover and the bearing/knuckle and filling the gap in the dust cover. If you don't do this it can let water in and trap it behind the hub bearing. That can lead to premature failure. Most after-market Hub bearings will give you a O-Ring for this purpose.

Hub bearing installed. The gap I mentioned is behind the ABS Sensor.

An important thing to note, is you will be using the stock G-body brake hose here. However, you will have to cut off the rubber boot on it so it can flex right. It’s not a big deal I just put some wire loom over. Just dont nick the F*ing brake hose!!!!

Here it is installed

You're all done just put your tire in and drive!

Thats it!!!

here are some shots comparing the 2 calapers

Torque Specs

Wheel Hub and Bearing Assembly to Steering Knuckle Bolts 77 ft.lb
Ball Joint (Lower) 79 ft.lb
Ball Joint (Upper) 61 ft.lb
Ball Joint (Upper Replacement Joint Bolts) 17 ft.lb

Here's some part number help.

Brake Caliper “Passanger side C599 & driver side C598” $45.00 new core $25 each
Brake Pad Caliper Bracket PN# 14-1105 and 14-1106 $11 each on Rockauto
Brake Rotor PN# (55047) $20~$40 each
Brake Pads PN# (726) $20.00~$60.00
Bearing Hub assembly PN# (513200) $50.00~$200.00 each
The knuckles I used came from the junkyard and cost me $50 each for the yard to pull for me, and also came with the Hub bearings. You can get Hub bearings cheep on line for $50~$60 new

and my 1 man bleeder system :D click for the video



Comic Book Super Hero
Sep 2, 2010
California So Cal
Re: 89~05 Blazer brake upgrade! DONE!

Wow. Great info, i will be doing this upgrade shortly...this will come in handy!! Thanks


Rocket Powered Basset Hound
Oct 14, 2008
Gainesville, Fl
Re: 89~05 Blazer brake upgrade! DONE!

Nice!! Thanks for sharing the pics and information. It's on my list of to-do upgrades. I guess you didn't have to unbolt the shocks or swaybar links. That makes it easy. I wondered about the brake hoses...cool. You pretty much covered it. :D
I think I saw a set at the boneyard...I hope they're still there... :?
BTW, I like your power bleeder.. 8)


Aug 28, 2009
South Buffalo / West seneca NY
Re: 89~05 Blazer brake upgrade! DONE!

i added some more info and some pics


Royal Smart Person
May 26, 2007
Hillsdale, MI
Re: 89~05 Blazer brake upgrade! DONE!

First of all, let me say good detailed information and pictures :mrgreen:

I just find it very hard to believe that that swap is worth the money spent. Gaining a 1/4" in overall diameter of the rotor and going from the single piston caliper to a dual piston caliper. It would be cool to see a before and after braking pad test done, just to show the difference in stopping power/distance :idea:
  • Like
Reactions: Randy majewski


Aug 28, 2009
South Buffalo / West seneca NY
Re: 89~05 Blazer brake upgrade! DONE!

All I can say is it helped me i can feel the difference. The pads are bigger The duel pistons combined have more service area to push then the single.


Jun 29, 2008
Re: 89~05 Blazer brake upgrade! DONE!

I have got to ask for some good ride height pics, and see how the suspension travel is affected. It looks great, hope to see more folks try this see how they like it.
I am planning to install an A-body/IROC big brake install, but this dual piston set up might be a better route.
  • Agree
Reactions: ELKMEANO


Rocket Powered Basset Hound
Oct 14, 2008
Gainesville, Fl
Re: 89~05 Blazer brake upgrade! DONE!

mkube396 said:
All i can say is it helped me i can feal the difrince. the pads are bigger to and the duel postons combined have more serfice to push then the single.
besides the larger two piston calipers...the brake pads are significantly larger. I've heard that the braking power is quite noticeable. I could imagine, between doing the front Blazer swap and adding the later F-body rear disc set up what the braking capability would be like.
Thread starter Similar threads Forum Replies Date
gnvair WANTED 98-05 Blazer 2 wheel drive rear disc brake brackets Wanted 0
Tuffregal83 Wifes 05 yukon xl Non-G Projects 0
565bbchevy 1982 GP with 98' 3800 and turbo on E85 General Discussion 35
Mr.1980 OLDS 1991 Oldsmobile 98 Running Rich Non-G Projects 4
39F ARB kit vs blazer sway bar swap Frame / Chassis / Suspension / Steering 2
JAMCAR223 2WD Blazer Spindles $130 shipped to the lower 48 ( Canada extra ) G-Body Parts For Sale / Trade 2
Clutch WANTED ISO Blazer spindles Wanted 1
08Malibu Blazer spindles price Frame / Chassis / Suspension / Steering 21
fleming442 "New" K5 Blazer/Tahoe OFF TOPIC 12
Clarkwb100 Blazer brake upgrade help Wheels / Tires / Brakes 16
C Need quick help with brake line Blazer upgrade Wheels / Tires / Brakes 5
D Blazer brake? Wheels / Tires / Brakes 6
8 Blazer Rear Sway Bar Frame / Chassis / Suspension / Steering 57
joesregalproject Chevy Blazer commercial General Discussion 5
ElCaminoEd Parking Brake headaches Wheels / Tires / Brakes 7
houston_t Rear to front brake line. Wheels / Tires / Brakes 1
CutlassKage CUTLASS Inner parking brake clip Wheels / Tires / Brakes 1
Bullett801 Rear Disc Brake Conversion Question Wheels / Tires / Brakes 19
CDUNIGAN1981 Brake booster dust sleeve deteriorated Wheels / Tires / Brakes 1
@BurnoutsandRotorblades Easy E-Brake solution "LS Disc Brake" upgrade Wheels / Tires / Brakes 3
O 78 Malibu brake parts G-Body Parts For Sale / Trade 5
B CUTLASS Brake line mount bolt size Wheels / Tires / Brakes 0
olds307 and 403 Brake tubing on G bodies? Wheels / Tires / Brakes 14
olds307 and 403 Standard or Metric thread on brake line connections on my 88 Cutlass Classic? Wheels / Tires / Brakes 2
Mr.1980 Emergency Brake Cutting Power Electrical / Ignition / Starting 4
Bobbystill PerformanceOnline.com Brake kits? Wheels / Tires / Brakes 11
69hurstolds OPINIONS WANTED: Best G-body Pre-bent Brake Line Vendor. Wheels / Tires / Brakes 26
D E-brake problem Wheels / Tires / Brakes 2
G WANTED Brake Metering block for 1980 GP Wanted 1
Bonnewagon Settle a brake argument Wheels / Tires / Brakes 43
white85 Rear disc brake kits Wheels / Tires / Brakes 39
79 GP 4 speed Brake line protection? General Discussion 6
R MALIBU Turn signals work but no brake lights Electrical / Ignition / Starting 3
D rear brake bleeder Wheels / Tires / Brakes 7
Ribbedroof Brake bleeding General Discussion 18
D 2000 Camaro e brake hook up? Wheels / Tires / Brakes 16
S upgrade to bigger rear brake drums General Discussion 22
D Pre filling brake lines??? Wheels / Tires / Brakes 34
D Off brand company brake problem Wheels / Tires / Brakes 12
G Rear Disc Brake Conversion - Issues Chevrolet Monte Carlo / SS / Malibu 18
G Brake Boosters what's the difference? How-To's / Knowledge Base 18
D Parking Brake Assembly General Discussion 2
D Used RUST FREE suspension and brake parts MOST R FREE Frame / Chassis / Suspension / Steering 4
pontiacgp Master Brake Cylinder Bad? Wheels / Tires / Brakes 13
M No Brake Lights! Electrical / Ignition / Starting 7
D brake line fittings Wheels / Tires / Brakes 5
pontiacgp Vacuum Pump Brake Bleeding General Discussion 19
TURNA doing a C5 brake upgrade...Or use AC Delco parts......? General Discussion 5
Similar threads

Please support GBodyForum Sponsors

Classic Truck ConsolesDixie Restoration DepotMike's MontesP-S-TSouthside Machine PerformanceUMI Performance

contact[email protected]for info on becoming a sponsor