Replacing Brakes
Thread Starter
Advanced
Joined: Mar 2019
Posts: 61
Likes: 12
From: Northeastern PA
Replacing Brakes
Looking on line to purchase Brake Pads, Rock Auto AC Delco ask for a Brake Code JL9, J55 and /or asking Heavy Duty Brakes. Where can I locate the information they ask for?
Race Director
Joined: Dec 2002
Posts: 10,461
Likes: 1,148
From: Wayne Township WI
Codes are for a specific brake options.
F55's mag suspension (shocks), JL9 brakes also tho' not exactly sure what it constitutes. Larger disc?
Look on rear of glove box door for RPOs listing all options car was born with.
Carefully read codes, it'll tell you what you're driving brake-wise IF they were an option.
Assume stock if no brake RPO code.
My best guess, mind you.
G/L
F55's mag suspension (shocks), JL9 brakes also tho' not exactly sure what it constitutes. Larger disc?
Look on rear of glove box door for RPOs listing all options car was born with.
Carefully read codes, it'll tell you what you're driving brake-wise IF they were an option.
Assume stock if no brake RPO code.
My best guess, mind you.
G/L
Thread Starter
Advanced
Joined: Mar 2019
Posts: 61
Likes: 12
From: Northeastern PA
Codes are for a specific brake options.
F55's mag suspension (shocks), JL9 brakes also tho' not exactly sure what it constitutes. Larger disc?
Look on rear of glove box door for RPOs listing all options car was born with.
Carefully read codes, it'll tell you what you're driving brake-wise IF they were an option.
Assume stock if no brake RPO code.
My best guess, mind you.
G/L
F55's mag suspension (shocks), JL9 brakes also tho' not exactly sure what it constitutes. Larger disc?
Look on rear of glove box door for RPOs listing all options car was born with.
Carefully read codes, it'll tell you what you're driving brake-wise IF they were an option.
Assume stock if no brake RPO code.
My best guess, mind you.
G/L
JL9
Brake System, Power, Front and Rear Disc, Antilock, 4-Wheel
Thread Starter
Advanced
Joined: Mar 2019
Posts: 61
Likes: 12
From: Northeastern PA
Codes are for a specific brake options.
F55's mag suspension (shocks), JL9 brakes also tho' not exactly sure what it constitutes. Larger disc?
Look on rear of glove box door for RPOs listing all options car was born with.
Carefully read codes, it'll tell you what you're driving brake-wise IF they were an option.
Assume stock if no brake RPO code.
My best guess, mind you.
G/L
F55's mag suspension (shocks), JL9 brakes also tho' not exactly sure what it constitutes. Larger disc?
Look on rear of glove box door for RPOs listing all options car was born with.
Carefully read codes, it'll tell you what you're driving brake-wise IF they were an option.
Assume stock if no brake RPO code.
My best guess, mind you.
G/L
JL9
Brake System, Power, Front and Rear Disc, Antilock, 4-Wheel
Pro
Joined: Jul 2012
Posts: 625
Likes: 57
From: San Jose CA
The base and the HD brakes (Z51/ F55 options) use the same pads. The rotors are a bit larger diameter and use brackets for caliper mounting to accommodate the larger rotors.
Note "padlets" are available for GS/Z06 brakes.
Note "padlets" are available for GS/Z06 brakes.
Le Mans Master
Joined: Jan 2008
Posts: 6,457
Likes: 297
From: corpus christi Texas
Those pads suck from what I've heard,stopping power over 170 mph might get you in trouble...I would never use pads from a parts store name.....You get what you pay for...I do high speed runs sometimes and i prefer pads that will perform as needed....
Last edited by Cherokee Nation; Apr 23, 2019 at 12:36 AM. Reason: correct
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Le Mans Master
Joined: Sep 2014
Posts: 7,001
Likes: 988
From: lake havasu city arizona
Well maybe, but IMHO they do just fine with little brake dust also, so you'll forgive me if I don't run out and change mine out to one of the superior brands, have a great dayNSF
Le Mans Master
Joined: Jan 2008
Posts: 6,457
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From: corpus christi Texas
Le Mans Master
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From: Las Vegas Nevada
Heel & Toe
Joined: Apr 2019
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Le Mans Master
Joined: Sep 2014
Posts: 7,001
Likes: 988
From: lake havasu city arizona
I can attest personally that my car came to a very quick stop from 70mph with these said pads, no ****, in fact a couple of times 
NSF
Race Director
Joined: Aug 2008
Posts: 14,077
Likes: 1,591
From: Edmond Oklahoma
Correct! what you are looking for is a large white sticker with a lot of numbers on it located on the inside of the glove compartment door. The numbers are the RPO (Regular Production Number) for al the major components, packages and such that your car has. the sticker is hard to read because the print is small and sometimes very lightly printed. for your 2006 you are looking for Z-51 which is a handling package with heavy duty brakes providing you do not have a Z-06 which is another issue.
Drifting
Joined: Jul 2011
Posts: 1,519
Likes: 235
From: Pa
I am thinking of replacing my OEM J55 brake pads due the squealing. The OEM J55 (Z51) pads wont stop squealing, tried various options, still squeal.
Last edited by steig; Apr 22, 2019 at 09:09 PM.
Le Mans Master
Joined: May 2015
Posts: 5,187
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From: Las Vegas Nevada
Pro
Joined: Jul 2012
Posts: 625
Likes: 57
From: San Jose CA
C6 has enough brakes that a panic stop at street speeds is gonna work with most any pad. Get into some aggressive twisties or modest track and they may have shortcomings.
Just my opinion, but a car which is so capable should have more than the "minimum" capable of an occasional panic stop. My choice was Hawk HPS 5.0 for a balance of street and performance. Much less dust than factory (I think my stockers were the early version) and no noise as yet.
Just my opinion, but a car which is so capable should have more than the "minimum" capable of an occasional panic stop. My choice was Hawk HPS 5.0 for a balance of street and performance. Much less dust than factory (I think my stockers were the early version) and no noise as yet.
Last edited by BackInBlack05; Apr 23, 2019 at 11:54 AM.
Le Mans Master
Joined: Jan 2008
Posts: 6,457
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From: corpus christi Texas
