I have a 01 GMC Sonoma with the 4.3 engine. Auto trans, 2 wheel drive. I have recently had problems with what appears to be the fuel pressure regulator. When the truck has been sitting for awhile, it cranks for several seconds before starting. When it's warmed up (hasn't sat for long), it lights right off. I also have noticed that my gas mileage is worse than normal and I smell gas on occasion with no sign of leaks. Sounds like the fuel pressure regulator. Now, where is this silly thing? I have looked in the Chilton GMC manual and the Motor Light truck manual. No luck in either. Thanks for any info.