ABS and Brake light come on

[quote:88bcb2b365="Copatlarge"]2001 Silverado
4X4
8.1 liter
120,000 miles

My truck has an intermitent problem. Sometimes i'll be driving and the ABS and Brake light come on at the same time. even when not using the brakes. Ran codes, both shops telling me nothing shows up on the computer. Everything still works fine, however i need to figure it out so as not to unexpectedly have an accident.
Thanks[/quote:88bcb2b365]does the abs pump start running on its own when the lights come on?

[quote="dennyp"][quote="Copatlarge"]2001 Silverado
4X4
8.1 liter
120,000 miles

That I don't know. I don't know how to check that or where to even find the abs sensors to check them.

[quote="Copatlarge"][quote="dennyp"][quote:7cc5e3cfe9="Copatlarge"]2001 Silverado
4X4
8.1 liter
120,000 miles

That I don't know. I don't know how to check that or where to even find the abs sensors to check them.[/quote:7cc5e3cfe9]if the pump runs,you will be able to hear it. It makes a grinding type noise and makes it difficult to stop when braking.

It never does that, and the brakes aren't affected. They seem the same whether the lights are on or off. I read somewhere that it might be a ECBM but it's not having any stopping problems or difference at all..

[quote:9dad168ea1="Copatlarge"]It never does that, and the brakes aren't affected. They seem the same whether the lights are on or off. I read somewhere that it might be a ECBM but it's not having any stopping problems or difference at all..[/quote:9dad168ea1]you will probably need a good scan tool to isolate this problem. If the truck is lifted, look for stretched/damaged wires that could be intermittently losing connection. Check front wheel bearings as well

When driving the parking brake light comes on above speeds of 34 mph and stays on until ignition is turned off. I have replaced the speed sensor, brakes work fine. I do not believe I have ABS, as I can find no sensors. Is there something in the VIN that will tell me if there is ABS? Also, the cruise control does not come on. Checked fuse, it's good.

If you have ABS, there will be a yellow warning light that turns on for a bulb check when you start the engine. There will also be a hydraulic control unit or a computer module near the brake master cylinder.

Pull up on the parking brake pedal. If the light, (red light) goes off, the main cable is stretchad and must be adjusted, or more commonly, one of the rear cables is sticking and not fully retracting to pull the pedal up.

Low brake fluid can turn the red light on. If it is low, don't fill it to the top. It is low for a reason. Either there is a leak that must be found and fixed, or the front brake pads are worn and should be inspected. New pads require the caliper pistons to be pushed back into their housings. That will force a lot of fluid back up into the reservoir and will spill over if you previously filled it.

caradiodoc

Brakes problem
2005 Chevy Silverado Four Wheel Drive Automatic

I park the truck in the driveway and it is on a slant,
and after the truck sets for a while the brake lights will come.

So what do you mean brake lights come on. Do you mean the lights on the dash or the rear brake lights? Get back to me so I can try to help ok.

If it's the rear brake lights coming on, you might have a mis-adjusted or faulty brake switch for the pedal.

Number 2 is the switch for the brake lights. When it happens again, pull up on the brake pedal to see if the lights go out.

I replaced left rear scalloped and bled the brakes, now the brake service light will not go off. How do you reset the warning?

I reckon you mean the "caliper"

Was the light on before you started fixin'?

Explain how you bled the brakes (detailed would be nice)

The medic

it will probably need a pro to bleed the brake because there is air in abs unit. he'll have to hook up scanner to open abs up with that and then shut the light off. only a scanner will turn it off.