How to identify what brake master cylinder I have? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

richards72chevy · 03-11-2019, 01:55 PM

Looking at the autozone web site and noticed they sell five different master cylinders.My truck is an 02 Silverado Canadian model.I know I don't have hydroboost.What is the difference with the others?

rpmerf · 03-11-2019, 02:33 PM

Not sure for 02, but for previous years there were standard and heavy duty braking systems designated JB6 and JB7. I usually go on the auto zone website beforehand and look for any special fitment / application notes. The codes should be on a sticker in your glove box.

Keith Seymore · 03-11-2019, 03:05 PM

Quote:

Originally Posted by richards72chevy

Looking at the autozone web site and noticed they sell five different master cylinders.My truck is an 02 Silverado Canadian model.I know I don't have hydroboost.What is the difference with the others?

Well - within the Silverado family there are 3 different series (1/2, 3/4 and one ton), 2wd and 4wd, three different cab types, two different box lengths, seven different power trains and dual rear wheel vs single. Some of those models can share a master cylinder but it takes several different part numbers to cover that breadth.

Need more detail. I have the engineering release brake charts - Please tell us the model, brake system or GVW of your truck and I can tell you what you need.

K

PS - Is there a part number or sticker on your existing master cylinder?

richards72chevy · 03-11-2019, 07:10 PM

There is bar code with zu on it.The master cylinder has a 18025075 stamped in the plastic.The truck is a 2002 Silverado 1500 4x4 4.8 extended cab.

richards72chevy · 03-11-2019, 07:12 PM

IMG_20190311_180225.jpg

richards72chevy · 03-11-2019, 07:14 PM

Gvw is 6400 lb.

95 S_Trucker · 03-12-2019, 06:01 AM

That is the part number for the reservoir only. Look on the aluminum part for a part number.

More details on your truck? 1500/2500/3500? How many wheel drive? What engine. JXX codes in the glovebox?

**hatzie** · 03-12-2019, 01:32 PM

The Jxx RPO codes from your SPID are important. JB5 JD7 etc...
That's one of the pieces of information Kieth was asking for along with GVW and 4wd or 2wd and cab/bed size

Keith Seymore · 03-12-2019, 09:07 PM

Quote:

Originally Posted by richards72chevy

There is bar code with zu on it.The master cylinder has a 18025075 stamped in the plastic.The truck is a 2002 Silverado 1500 4x4 4.8 extended cab.

Well done; unfortunately I have to apologize as I pulled the book down and it only goes to model year 2000.

I can say that in 2000 a 6400 lb GVW equated to a JC5 brake system, so I would take an educated guess and say you are a JB5 system.

K

richards72chevy · 03-16-2019, 10:02 AM

IMG_20190315_183135.jpg

95 S_Trucker · 03-16-2019, 03:13 PM

If you are shopping at autozone:

https://m.autozone.com/brakes-and-tr...1640_2558?aqs=

richards72chevy · 03-16-2019, 08:01 PM

Thank you guys for the help.

03-11-2019, 01:55 PM	#1
richards72chevy Registered User Join Date: Dec 2010 Location: konawa ok/oakdale Ca. Posts: 1,652	How to identify what brake master cylinder I have? Looking at the autozone web site and noticed they sell five different master cylinders.My truck is an 02 Silverado Canadian model.I know I don't have hydroboost.What is the difference with the others?

03-11-2019, 02:33 PM	#2
rpmerf Registered User Join Date: Feb 2011 Location: Parkville, MD Posts: 1,024	Re: How to identify what brake master cylinder I have? Not sure for 02, but for previous years there were standard and heavy duty braking systems designated JB6 and JB7. I usually go on the auto zone website beforehand and look for any special fitment / application notes. The codes should be on a sticker in your glove box. __________________ 1970 C20 Custom Camper - 350, TH350 1997 GMC Suburban 1994 Acura Integra GSR 1987 Dodge Daytona Shelby Z

03-11-2019, 07:10 PM	#4
richards72chevy Registered User Join Date: Dec 2010 Location: konawa ok/oakdale Ca. Posts: 1,652	Re: How to identify what brake master cylinder I have? There is bar code with zu on it.The master cylinder has a 18025075 stamped in the plastic.The truck is a 2002 Silverado 1500 4x4 4.8 extended cab.

03-11-2019, 07:12 PM	#5
richards72chevy Registered User Join Date: Dec 2010 Location: konawa ok/oakdale Ca. Posts: 1,652	Re: How to identify what brake master cylinder I have? IMG_20190311_180225.jpg Attached Images

03-11-2019, 07:14 PM	#6
richards72chevy Registered User Join Date: Dec 2010 Location: konawa ok/oakdale Ca. Posts: 1,652	Re: How to identify what brake master cylinder I have? Gvw is 6400 lb.

03-12-2019, 06:01 AM	#7
95 S_Trucker Registered User Join Date: Oct 2009 Location: . Posts: 2,187	Re: How to identify what brake master cylinder I have? That is the part number for the reservoir only. Look on the aluminum part for a part number. More details on your truck? 1500/2500/3500? How many wheel drive? What engine. JXX codes in the glovebox?

03-12-2019, 01:32 PM	#8
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,977	Re: How to identify what brake master cylinder I have? The Jxx RPO codes from your SPID are important. JB5 JD7 etc... That's one of the pieces of information Kieth was asking for along with GVW and 4wd or 2wd and cab/bed size __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful.

03-16-2019, 10:02 AM	#10
richards72chevy Registered User Join Date: Dec 2010 Location: konawa ok/oakdale Ca. Posts: 1,652	Re: How to identify what brake master cylinder I have? IMG_20190315_183135.jpg Attached Images

03-16-2019, 03:13 PM	#11
95 S_Trucker Registered User Join Date: Oct 2009 Location: . Posts: 2,187	Re: How to identify what brake master cylinder I have? If you are shopping at autozone: https://m.autozone.com/brakes-and-tr...1640_2558?aqs=

03-16-2019, 08:01 PM	#12
richards72chevy Registered User Join Date: Dec 2010 Location: konawa ok/oakdale Ca. Posts: 1,652	Re: How to identify what brake master cylinder I have? Thank you guys for the help.



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