My 2003 cadillac cts was stuck in park and abs brake and traction lights are on replaced shifter wire car is not in park anymore but abs brake and traction light is still on. Also, resurfaced rotars and put hardware clips on front brakes. How do I fix this

NO !!!

Have to have the car checked for codes & diagnosed,
like every problem you ever had, with any vehicle

Same procedure every time-- all problems

Check battery
Check for codes
Check factory trouble charts,bulletins,google,you tube,gather the
required info to learn the system your having issues with
Do the required testing to find a problem

You know how long it has been & should know in detail
what was done,what you paid for & should have been shown
up close that work in the past & have a log book on your brake
work

So NO --doubt unless you neglect to do anything but drive a vehicle, that brake work is needed

The problems is in the ABS Braking System,the Trac Control
tells you that

If the brakes do not come apart once a year,then you need to do
some cleaning & lube there also

well while putting the car on the lift, traction control does not need to be disabled, and will not cause the abs/traction light to illuminate, these cars are known to have terrible wheel speed sensors that are brittle and tend to brake or malfunction for no apperent reason, and the wheel speed sensors are what control your abs and traction conrol units and they are normally what make the light come on on your dash, the warranty on the sensors was prolonged for that reason, so depending on the mileage of your car they might be covered, hope this helps

sounds like you have a bad brkae light switch, which is located on the brake pedal assembly. a bad switch will not let you shift out of park and you will not have any brake lights as the car does not recognize that the pedal is being pushed and brakes engaged. easy to replace switch if you are handy, if not this is a inexpensive repair at any mechanic. hope this was helpful is so please rate 4 thumbs.

ur blake light switch needs replaced I had same problem.

doubt if tire size will be the problem
more like bad wheel sensors and wiring
the traction control use the same sensors as the ABS

check to see if your brake lights work if not then check fuses first and if fuses are good then change brake switch. if the light do work you will need to change the solenoid in the shifter housing.

lights usaly come on when there is a system fault. check for a broken or chiped wheel speed sensor ring, or a damaged wheel speed sensor. try disconecting the negative battery terminal for a few seconds to reset lights

need to get abs codes read. it will tell you what wheel to look at.
1.bad wheel bearing, sensor is part of bearing.
2.broken wires to sensor.
3.traction control part of abs

HOW MANY CRANK SHAFT SENSOR ARE THERE