My 2000 GMC Savanna van, 3500 extended, 5.7 gas, has 250K miles. I replaced fuel pump at 140K, tires at 216K, brakes, rotors, exhaust at 250K. Any input on time for another fuel pump? If 1st failed at 140K, will replacement last as long, longer, or is there no rule of thumb? Transmission life? Engine life? Other things? I guess I can't complain so far. I imagine the Chevy Express has the same history as the GMC Savanna? Your input is appreciated.