Sounds like batteries. But until you buy new try ....
Turn the key ON ....
Wait till glow plugs light goes out then turn key OFF
Turn key on again. But this time continue to start.
I found this worked well in 10deg temps. Glow plug will be just that little bit hotter with a little extra fuel.
Can anyone tell me if the new 2008 Tailgate with the built-in step will fit on my 2006 Truck ? Looks to me that the only change is the driver side hinge, more for the "assist" lift than fit. Anyone ??
Thank You ... Question answered !!