I did a search and read an old post pertaining to 'in tank' pumps failing,,, and inline pumps being 'added', which just caused the new inline to fail unless the In tank pump was used as well.
I do remember my brother wanting to kick butt, when operators didn't fill the tanks and let them run down to empty. He had come to the conclusion that the fuel level should be kept Above 1/4 so the 'in tank' pump wouldn't pull air and cavitate when the fuel sloshed in the tank. His instruction to the operators was to operate on the Top Half of the tank, Not the bottom half.
Less condensation, and no cavitation.
I'd say if you call the Chevy Store and give them the year and model. They'll have an answer, that includes the Part # as well.