Diesel truck dies, chevy, not mine

I had a 94 gmc with the same problem and lots of friends and coworkers with it too. either the injection pump needs to be replaced or it's just the fuel driver which is a little box on the intake that is over heating and causing it to quit. it needs to be replaced and moved somewhere away from the direct heat of the engine. gm had major problems with the 6.5 turbo diesels and there was a recall on the injection pumps. maybe there is a chance it hasn't been replaced yet. good luck.