Oh man, that's a mess!
I'm not sure how you're managing to post photos after only 2 posts, seems like it varies. The signature option is in "settings" top right on the menu and when the page opens, it's third box down on the left hand side "my settings". If a signature option is not visible, then I'm guessing it's locked for the moment, till the post count is up.
The forum tries to encourage participation, so 'one-time posters' are discouraged somewhat. It's a friendly place with useful info and advice but it also thrives on your contributions, when you have something to say.
Is the truck repaired now, or are you still in process? That's a fair bit of damage, albeit mostly cosmetic.
Im a bit confused by "a leaking tensioner when he changed the drive belt". Assuming you're referring to the cam belt, the tensioner should be changed when the belt is renewed anyway as part of the process, but leaking? There's nothing to leak, it's just a tensioner. Some folks change the water pump at the same time while they're in there, maybe you had a leak from the water pump... Confused
As for pulling to the left under drive, that's usually one one of two reasons. You've ruled out tyres it seems, sometimes odd tyre son the same front "axle" can give you imbalanced steering, but you say you've changed the tyres. Are they the same brand/size/pressure on both sides, worth checking. Otherwise, it sounds like geometry. That can be out as a consequence of an impact, or worn suspension joints, allowing movement where it shouldn't be, or misalignment.
I would suggest you you getting a digital geometry check and print-out. These days, they can give you all geometry characteristics of each wheel individually, front and rear. That would be a good starting point to track down where the problem may be. What concerns me is you saying it has always pulled to the left even from new. If I'd paid new price for a new vehicle, I'm sure I wouldn't be happy if it was pulling to the left!
Maybe they dropped it off a transporter or something, still it's too late for us to be concerning ourselves with something that may or may not have happened in 2006
Try to find a good vehicle centre that has the geometry equipment to run a measurement.
