ABS and Break lights come on

[2001yukonxl]

I have a 2001 Yukon XL. Recently my ABS abd Brake Lights came on after I start the engine and while driving. Note : they go out after the start up, but they come on sometimes after. This behavior is not consistant. I have cleaned my ground contact under the driver door, no change. any ideas what may be the root cause ?

Thanks
Frank

 

[SunlitComet]

you are in the wrong forum but for a 2001 i would say your connectors are dirty on the abs electronic brake control module on your left frame rail causing solenoid errors to be reported. disconnect the wire plugs and inspect.