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Service Brake system?

Discussion in 'Chevy Trucks' started by DareDog, Jan 22, 2013.

  1. DareDog

    DareDog PlowSite.com Addict
    Messages: 1,438

    Just had this pop up on the dash and it dose it every time i start the truck, 2005 1500, what could it be? i was wondering what was next fixed service 4wd , and airbag on it.
  2. kimber750

    kimber750 PlowSite Veteran
    Messages: 4,674

    Start by checking break fluid level.
  3. Cosmic Charlie

    Cosmic Charlie Senior Member
    Messages: 237

    When I needed front brake pads the brake peddle would go to low toward the floor & trigger it, sometimes just adding brake fluid to the reservoir can temporarily fix it

    many other things can do it also ....
  4. Snowzilla

    Snowzilla Senior Member
    from Iowa
    Messages: 397

    I had an '03 2500hd that did that occasionally. But mine would go away by turning off ignition & restarting. It was quirky.
  5. plowking15

    plowking15 Member
    Messages: 91

    Sometimes it can apply to the trailer braking system. If it has one built in. My 07 NBS had a light,it was something to do with trailer system. My light went out so I didn't take it back to dealer.
  6. Cosmic Charlie

    Cosmic Charlie Senior Member
    Messages: 237

    also during very COLD temps mine would show once & a while - then be OK later
  7. brad96z28

    brad96z28 PlowSite.com Addict
    Messages: 1,525

    Usually a problem with the ebcm. Not hard to figure out once you ck the codes.
  8. skostur79

    skostur79 Member
    from ne ohio
    Messages: 67

    x2 brake fluid

    you don't have the little black vac pump on the side of booster do u?

    some 03-04 had them that would come on at low vac conditions
    Last edited: Jan 23, 2013
  9. 99LsSilverado

    99LsSilverado Junior Member
    Messages: 18

    After searching I found that the ground under the drivers door should be cleaned and install a new bolt to get a better frame ground to the ecbm
  10. brad96z28

    brad96z28 PlowSite.com Addict
    Messages: 1,525

    Ive tried that a 100 its never fixed anything for me. And the fluid will only put on the red brake light not the service brake message!. Ck the codes and be done with it. Most common is co 265.
    Last edited: Jan 23, 2013
  11. RMHSR

    RMHSR Member
    Messages: 49

    Anyone have the transmission act up at the same time the service brake system message comes on. My 04 2500 started today while doing salt. The trans is slipping and I not sure it is coming out of second gear. Once the message and lights go out, trans works fine. All the post I have read regarding this problem, nothing mentions transmission. Help please, more snow coming this week.
  12. RMHSR

    RMHSR Member
    Messages: 49

    An update. About 40 mph the speedometer bounces which cause the trans to constantly shift to maintain speed. The more load on the truck the more it shifts, sometimes acting like it is not going into gear and slipping. In town don't really notice a problem due to slower speeds.
  13. Plow Nuts

    Plow Nuts Senior Member
    Messages: 214

    you may want to check your codes. It could be a number of things causing your brake light and trans issue such as rear wheel speed sensor, trans speed sensor,:mechanic:
  14. Mr.Markus

    Mr.Markus PlowSite Fanatic
    Messages: 5,778

    I had a corroded air bag sensor module (under the drivers seat) that did crazy wonderful things electrically to my 07 3500.
    Took me a month to track cause no 2 days were the same...
    Service 4wd,service brake,starting issues,pwr door lock issues etc. It's funny how a little short can play with so many systems. Ok... it wasn't a small short but plug and play new module and the truck was 100%.

  15. RMHSR

    RMHSR Member
    Messages: 49

    Thanks, code reader showed rear wheel speed sensor. Driving the truck was going about 30 but sensor was spiking to 80 on the reader. Going to try that and I will respond with results.
  16. RMHSR

    RMHSR Member
    Messages: 49

    Replaced sensor. So far no problems. Very easy repair.