After reading other threads and doing some diagnosing I'm pretty sure my fuel pump is on its way out on my 99 GMC Sierra Classic 5.7L. Mine is a SWB with about a 25gal tank. Unfortunately the tank is almost full right now! I may be able to drive it out before the pump totally gives up but either way I'm wondering for those who have already done this job - would it be easier or less time consuming to drop an almost empty tank and replace the fuel pump, or to unbolt and raise the bed to get to it? Thanks.