Buddy of mine has an 03 2500 6sp. Has a 100hp Dr.Performance chip on it. Last week he tried to take the chip off, truck was running. Said it started acting funny so he plugged it back in. Engine light and parking brake and ABS lights came on. Thursday the check engine light went off, but the others are still on. He's tried disconnecting the batteries to let the computer reset but the warning lights are still on. Any clue? Im clueless on anything with a computer.

 

Did the chip have ability to correct speedo for tire size. Lost that link if has a code. Should have some code in ABS to expain.

 

No its just an inline one setting chip.

 

My 04 had this trouble, I had washed truck and ABS light and park brake light come on. IN the end after trying everything else, it was the driver's side wheel bearing on the front axle and the ABS sensor was actually melted on the end and wouldnt pick up the signal.

 

Bump, any help?