Yes, but apparently GM wasn't going to make the panel and hole required to make that possible, with the structural rigidity to make it safe for a passenger vehicle in case of a bad wreck or rollover crash, for something that wasn't a regular repair item. Remember, GM never figured that 20+ years after they were built, these trucks would still be around and so many people would still be using them on a regular basis. They probably figured everyone would trade them in, when the newer ones came out, and the fuel pump life or serviceability never entered into the discussion.