One problem related to service brakes has been reported for the 2003 Chevrolet K1500. The most recently reported issues are listed below.
Traveling 25 miles home on interstate van had been cutting out if I pull over stop wait, can re-start and go a while. Cant predict it seemed to stay running if I went faster big mistake moved to pass it quit, at interstate speeds almost had to go into medium after yelling and waving arms and praying I got back into the right lane pulled off onto shoulder and went to pieces. It then stopped more and more finally got home and have not touched it since. I have been reading about similar events and it seems it is the crankcase positioning sensor. I am just happy to be alive. Need to fix it and sell it. Thanks for listening I am senior citizen.