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Discussion Starter #1
Checked door and glove compartment and found a bunch of other codes.

The guy at the store told me to measure the cylinder diameter. Which I will do as last resort. Just wondering where else it could be before I do that. Yes, yes, it's coming off anyway...

BTW I like our car quest store - when I got the wrong part online they had the right moog foe only $5 more. They also have Warner manual hubs for the same as amazon.
 

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Its one of the codes on the Glove box door.

Yes its important, my 3/4 ton 4X4 GMC for example had 4 possible brake systems, and there were others for 1/2 tone, one ton and 2WD versions of each..
 

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Ex- 6BT Square Body Man
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Anything with a "J" at the beginning on the RPO code list is for brake system type.

J1F : BRAKE PROVISION SPECIAL TO SUIT FOREIGN REGULATION
J41 : BRAKE SYSTEM, PWR, FRT DISC, RR DRUM, CAST IRON
J42 : BRAKE SYSTEM, PWR, FRT DISC, RR DRUM, ALUMINUM
J50 : BRAKE SYSTEM, POWER
J52 : FRONT DISC BRAKES
J55 : BRAKE SYSTEM, HEAVY DUTY
J56 : SPECIAL HEAVY DUTY BRAKE PACKAGE
J61 : DRUM BRAKES
J65 : BRAKE SYSTEM, PWR, FRT & RR DISC
J70 : BRAKE BOOSTER EQUIP
J81 : INDICATOR SWITCH, EXPORT
J85 : BRAKE SYSTEM, PWR, FRT & RR DISC
JA1 : BRAKE, LIGHT WEIGHT DISC DRUM
JA2 : BRAKE, HEAVY WEIGHT DISC DRUM
JA3 : BRAKE, SYSTEM, WAGON DISC DRUM
JA4 : BRAKE, SYSTEM, PWR FRT DISC, RR DRUM, CAST IRON
JA5 : BRAKE, SYSTEM, SPORT COUPE DISC DRUM
JA6 : BRAKE, EXTRA LIGHT WEIGHT DISC DRUM
JA7 : HANDLE, PARK BRAKE RELEASE, LEATHER
JA8 : BRAKE, MEDIUM WEIGHT DISC DRUM
JAF : BRAKE, PROVISIONS EUROPE
JB1 : BRAKE, MANUAL, DISC/DRUM, 4300 LBS
JB3 : BRAKE, POWER, DISC/DRUM, 4600 LBS
JB5 : BRAKE, POWER, DISC/DRUM, 6400 LBS
JB6 : BRAKE, POWER, DISC, DRUM 7200 LBS
JB7 : BRAKE, POWER, DISC, DRUM 8400 L85
JB8 : 8RAKE, POWER, DISC, DRUM 10000 LBS
JC4 : BRAKE, POWER, DISC, DRUM 5600 LBS
JC5 : BRAKE, VAC POWER, 4-WHEEL DISC, 7200 LBS
JC7 : BRAKE, POWER, DISC/DRUM, 12000 LBS
JCB : BRAKE, POWER, DISC/DISC, 20000 LBS
JD3 : BRAKE, HYD POWER, DISC/DRUM
JD5 : BRAKE, DUAL POWER, DISC/DRUM, 6400 LBS
JD6 : BRAKE, HYD POWER, DISC/DRUM, 7200 LBS
JD7 : BRAKE, HYD POWER, DISC/DRUM, 8400 LBS
JE1 : BRAKE, SYSTEM, EUROPE
JE5 : BRAKE, SYSTEM, PWR, ANTILOCK, FRT & RR WHL
JF9 : BRAKE, HYD POWER, 4 WHEEL DISC
JG1 : SHAFT, PROP, ALUMINUM
JH5 : BRAKE, HYD POWER, 4-WHEEL DISC, 7200 LBS
JH6 : BRAKE, HYD POWER, 4-WHEEL DISC, 9900 LBS
JL2 : BRAKE, FRT DISC, SINGLE PISTON
JL4 : ACTICE HANDLING
JL6 : BRAKE, SYSTEM, MAN, FRT DISC, RR DRUM, CAST IRON
JL8 : FRONT & REAR DISC BRAKES
JL9 : BRAKE, SYSTEM, PWR, FRT a RR OISC, ANTILOCK, FRT W
JM3 : BOOSTER, BRAKE, 240MM TANDEM, HIGH FLOW
JM4 : BRAKE, SYSTEM, PWR, FRT DISC, RR DRUM, CAST IRON,
JM5 : BOOSTER, BRAKE, 200MM TANDEM, HIGH FLOW
JM7 : BOOSTER, BRAKE HYD HI PERF, DELCO-MORAINE
JM8 : BRAKE SYSTEM PWR, FRT DISC RR DRUM, ALUMINUM,
 

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JH7 HYD POWER, 4 WHL DISC, 12,300 LBS
...for my 3500 Cab&Chassis
 

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Anything with a "J" at the beginning on the RPO code list is for brake system type.



JD5 : BRAKE, DUAL POWER, DISC/DRUM, 6400 LBS

Thanks Legend. :thumb:

I was always told the diesel Suburbans had the 3/4 ton series brakes on them. Guess not.:confuzeld
 

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Ex- 6BT Square Body Man
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This is my glove compartment sticker. Everything starts with an I. And no mentioning of brakes....

:think: Interesting, no brake code.
 

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This is my glove compartment sticker. Everything starts with an I. And no mentioning of brakes....
Very rare model, the Fred Flintstone special....no brakes but your own feet?
 

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Discussion Starter #9
Ya - I can sooth my sore feet on the soft tan doe skin afterwards.
 

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Maybe brakes are considered part of "Operating Conveniences"
 

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R.I.P. Sam
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More than likely, it has standard brakes for that model.

This is a list of options, if they arn't upgraded, there is no option to list.
 

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This is my glove compartment sticker. Everything starts with an I. And no mentioning of brakes....
I wish i had that option. Would save me explaing to my wife over & over again about why i don't use my brakes......
 
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