Question about 2004 Chevrolet Silverado

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Service Brake system after gear change

I bought a 2004 Chevrolet Silverado Z71 Crew Cab with 70,000 miles about three weeks ago. Within the last two days the ABS, Parking light, and Service brake system light have flashed three times, at the same time, and several hours apart. I have checked the brake fluid level and the pads, and both are good. I recently had some new tires put on, and got new center caps for my after market rims at a rim and tire store. I noticed the Mechanic having trouble putting on the front right hand tire, because of lack of space. Could he have bumped some kind of sensor, or damaged somthing? I would appreciate some advice. i have a similar problem on my 04 silverado. I recently swapped gears to 4:56's with my 35" tires. I had the 35's on for a few years before the gear swap. But ever since the gear swap i now have the "service brake system" come on after driving a few miles. I have reprogrammed the computer for tire size and gear ratio with a diablo predator. but i still get the warning on my DIC. if i scan it with the tech 2 we have here at work it says wheel speed mismatch... anyone have any ideas how i get it to go away? thanks for the help

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6ya6ya
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Posted on Jan 02, 2017

fyrebyrd1
  • 121 Answers

SOURCE: Service Brake system flashed three seperate times over 24 hours

2 suggestions:

(1) I would suggest someone scan the ABS system for codes. I Have an '03 silverado 2500HD Crew cab, and it needs an EBCM (Electronic Brake Control Module) "ABS module". "Service Brake System" message on dash, ABS and Brake warning lamps lit as well. May be the R/F ABS wheel speed sensor, but what you described happen, shouldn't have caused damage to it.
(2) If the aftermarket rim and tire combo are larger than stock (larger overall diameter), then this may affect the way your PCM functions. You can reprogram the PCM to recognize larger diameter running gear so trans shift points and the speedometer and such can function properly.
I hope this helps.

Posted on Nov 19, 2008

messstat
  • 365 Answers

SOURCE: Rims and Tires for 1991 Ford Festiva

Check Ford's Mustang, same year (4cyl model)
Awesome little car, by the way!

Posted on Jun 15, 2009

  • 60 Answers

SOURCE: difference between 4wd and 2wd concering rims

It is because of the hub assembly on the front axle will be much different on a 4wd. It will require a different offset and backspacing than on a 2wd.

Posted on Aug 18, 2009

Testimonial: "very helpfull info"

  • 468 Answers

SOURCE: hi i have an 1985 s10 blazer v6 2.8l and i have

Different size tires and rims will make a difference on how your speedometer works. In order to correct this, you will either have to change your tire size, have the gears in the rear axel changed, or put a different speedometer gear or adapter on the transmission.

Posted on Nov 07, 2009

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2 suggestions:

(1) I would suggest someone scan the ABS system for codes. I Have an '03 silverado 2500HD Crew cab, and it needs an EBCM (Electronic Brake Control Module) "ABS module". "Service Brake System" message on dash, ABS and Brake warning lamps lit as well. May be the R/F ABS wheel speed sensor, but what you described happen, shouldn't have caused damage to it.
(2) If the aftermarket rim and tire combo are larger than stock (larger overall diameter), then this may affect the way your PCM functions. You can reprogram the PCM to recognize larger diameter running gear so trans shift points and the speedometer and such can function properly.
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