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Hey guys, I'm new to the forum and looking any suggestions on a problem that has me stumped with my avalanche. It has a hard start condition. It seems to be related to the outside temperature. I didn't do it all winter and started back as the weather warmed up. It starts fine if the engine is completely cold and it starts fine if you crank it within about 15-20 minutes after cutting it off. If I cut the truck off and let it sit for two hours and try to start it it cranks for several seconds before starting. it's a 2004 with the 5.3. It doesn't have an inline fuel filter or a fuel pressure regulator on the fuel rail. Everything is in the tank module, which I have replace with a new AC Delco unit. I have also replaced the evap vent and purge solenoid. I'm going to try a crank sensor just for the heck of it tomorrow. It doesn't set any codes. Does this sound familiar to anyone. Any suggestions would be much appreciated!!