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Re: [Shop-talk] Silverado HD2500 Service Brake System

To: David Scheidt <>
Subject: Re: [Shop-talk] Silverado HD2500 Service Brake System
From: Ben Zwissler <>
Date: Sat, 26 Dec 2009 21:27:49 -0500
You've got a fault in the ABS electronics.  Is there a separate brake 
idiot light?  Is it on?  Is the message "red" or "yellow"?  If there's a 
red tell-tale (light or message) then its trying to tell you to do 
something immediately (like add fluid).  If its yellow or white its 
suggesting its not urgent but you should have it serviced "soon".

Agree that you'll need to read the code to tell what to do.  The generic 
OBD scan tools typically only read "emissions related" faults and you'll 
have to either use an OEM tool or purchase an "upgrade" to a generic 
tool to read OEM-specific codes (this includes ABS, air bags and other 
body electronic systems).  Some OEMs are extra nice and include the 
non-emissions-related fault codes on their "public" list, but I don't 
know if GM is in that camp or not.

Good luck,


Ben Zwissler
Columbus, IN
1966 Triumph TR4A
1973 MG Midget
1980 Triumph TR8
2007 Mazda RX8
2002 Yamaha FZ1
2003 Honda ST1300

On 12/26/2009 4:09 PM, David Scheidt wrote:
> On Sat, Dec 26, 2009 at 3:32 PM, Frank Vantacich
> <>wrote:
>> I own a 2003 Chevy Silverado HD2500 with 60,000 miles, the following DIC
>> message came on today "Service Brake System". The brakes work great.  Does
>> anyone have any suggestions as to where I should start looking for the cause
>> of the problem.
>> Thanks for the help.
> Check the fluid level, and then attach a scan tool.  There will be a code
> stored.  (I dunno if the code readers that auto parts stores will let you
> borrow will tell you this or not.)  The code will tell you where to start
> looking.  Chevy trucks of this vintage have a reputation for having weird
> random electrical problems with the brake system computers and sensors.
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