Why does the ABS and E-brake light come on at same time? on 2001 Chevrolet Silverado 2500 HD

This happens durning normal weather never when it rains. All the gages are good to go no brake smell or any thing wrong.

i think some fault codes in ABS and e-brake,
a code reader or code scanner will help you,
Autosnap CR800 can read the fault and clear the codes.