1999 GMC Sierra 1500 Pickup Owner's Manual - Page 289

2. Unplug the Shut-Offsolenoidwirefromthefuelpump enginefromstarting. to preventthe 3. Withtheairbleedvalveopen, turn yourignitionkey to Start for 10 to 15 seconds to crank(butnotstart)yourengine.Keepdoingthisuntil youcanjustseesomeclearfuelattheair bleed valve. IA b Diesel fuel is flammable. It could starta fire if it getsonhotengine parts. You could be burned. Don't let too muchfuelflowfromtheair bleed valve or screw, andwipeupanyspilled fuel withacloth. 4. Closetheairbleedvalve,orreplacethescrewandreconnectthe Shut-Offsolenoidwire. 5. Turntheignitionkey to Start for 10 to 15 secondsat a timeuntilyour enginestarts. Fuel Filter Replacement (6.5L Diesel Engines) Ifyouwanttochangethefuelfilteryourself,here'show to do it: 1 L I CAUTION A Diesel fuel isflammable. It could start a fire if somethingignites it, and you could beburned.Don't let it get on hot .engine parts, and keep matches ignition or other sources away. in thetank. 1. Turnoffyourengineandsetyourparkingbrake. 2. Takeoff thefueltankcap.Thisreleasespressure 6-1 1