Oh, and one more check for you - behind the passenger kick panel under the dash, you'll find an "inertia" switch. Reach over the top of the panel and feel for the top of the switch. It has a button on top, push it down. If it goes down and stays, try to start your rig. If you can't find the switch, remove the kick panel by pulling out at the top to unclip it, then keep pulling to unclip the second clip. You'll need to work it around to get it out of the hole... then you can see the switch and the rest of the wiring.
This is the switch the book recommends when relieving the fuel pressure to work on the fuel system such as changing the filter.
--Bruce.