I have a 2003 cadillac escalade ext and the check brake system light came on. The ABS and traction light are also on. What could be the problem?

The light being on means the system has detected a problem in one or more sensors. The vibration is the ABS modulating the brakes to prevent skidding because it has detected a wheel that is locked up. That wheel is most likely the one sensor that is giving you the error.

Low brake fluid level could cause that. Bad ABS wheel sensor. Brake switch. Go to Autozone and ask them to put the scanner on and see what codes you're getting.

take out the part you have fitted and have the OBD codes cleared ,then refit the part and see if the same happens

C0110 is abs pump circut problem. The pump is located on the frame rail under drivers seat area. The abs pump comes on to apply brakes as needed for the stability and abs systems. There is a fuse as well as a relay in the relay-fuse center under the hood on the drivers side. please check the fuse and switch the relay with another one that looks the same.

Cluster warning lights

Whenever this warning light or any other stays on in the dash it is indicating that the systems control module (or the system sensor in the case of lights like low oil pressure, door open indicators etc.) has detected a fault, it then disables the system (this applies to ABS,TCS, TCM, SRS, TPMS, MIL, CEL and BCM faults and others) as long as the light is on. You must now have the dealer hook up a special electronic diagnostic tool and "scan" the system for the fault code that is stored for the problem(s)

Legend of Abbreviations. ABS Anti-lock brake system. TCS Traction control system, TCM Transmission control module, SRS Supplemental restraint system, BCM Body control module. TPMS Tire Pressure Monitor System, MIL Malfunction Indicator Lamp, CEL Check Engine Light.

Check the ABS hub reluctor ring to make sure it was not damaged in any way when you put everything back together. Also check all the wires to make sure none are crimped or disconnected. Lastly check the brake master cylunder for fluid level. Sometimes after retracting the pistons forcing more fluid into the master cylinder will cause this meesage. If the fluid level is to high simply remove some.

it will cause your abs and traction control not to work properly or at all

THIS PROBLEM MAY BE A DEFECTIVE TURN SIGNAL SWITCH OR A DEFECTIVE BRAKE LIGHT GROUND, THE BRAKE LIGHTS ARE GROUNDED NEAR THE SOCKETS, YOU WILL NEED TO PULL THE TAIL LIGHT ASSMEBLIES OUT TO CHECK THESE GROUNDS TO THE SHEET METAL.

check belt and check p/s fluid if ok pump is probably bad with truck running you should be abel to see the fluid flowing threw th reservior when running