stalls when ideling on 2003 Ford F-250 Super Duty

it has onlt 73000 miles never off road, truck stalls when ideling at a stop or red light only. run good on the highway took to truck to a shop had the speed sencer replaced but still stalls

If has no cel then I would suspect the tune parts if have never been replaced. Start with basics first. Your post does not say if tune work has been done on time. Dirty throttle body, worn tune parts, vacuum leak, etc.