hey i have an 07 new body style silverado just lowered it 4/6 inches and ever since my abs and stabilitrac light come on and stay on until i turn the truck off and reatsart of course it returns at the first brakingapplied

 

are all ofr the abs sensors in place?

 

did the kit include new drop spindles? im guessing its 4x4? if so either the sensors are acting up or the spindles have something to do with the lights. double check everything that has to do with the drivetrain that you changed when installing the drop. thats what i would do