CS:Source/Left 4 Dead box truck cab reference photo found!!

[Bruner]

Hello everyone!  I've found something interesting (and bizarre) that I think you'll get a kick out of.

Just now, I found the original photo used for the side of the de_nuke truck's cab. I lined up the door handle, window frame, and what's left of the mirror on the texture with the photo, and they line up almost perfectly! Obviously the photo has been slightly edited, to look more natural on the model and to also avoid legal issue, but overall I think it's a very good match!
The final detail that seals the deal of this being the original photo is what I've circled in red in the third photo I've provided. 

[Bruner]

Here's where it gets REALLY interesting! This is not the only photo of this specific truck used for the side cab texture. There's actually multiple different photos and a Youtube video of this same truck on this website here: https://www.vanderhaags.com/detailview.php?manufacturer=chevrolet&model=w4500&inventorytype=cab-assembly&wcf=parentmodel

This is definitely one of the weirdest discoveries I've ever made, but it's a really cool one.

[Jar of Flies]

Great work! Where did you find this?

[Bruner]

Great work! Where did you find this?

I found it by doing an extensive search on Google. I was bored yesterday, so I thought I'd challenge myself.

My method of trying to find texture sources is usually specifying a year during or before a particular game was in development. I've also tried specifying a location like Seattle/Bellevue Washington (Valve's locations), or Orange County California (Turtlerock's location). Not much luck with that unfortunately.

For this, I tried searching the W4500 under multiple years and between the three manufacturers which produce this truck (GMC, Chevrolet, and Isuzu). I eventually landed on the search "2001 Chevrolet W4500", which I took and compared a lot of similar photos to the raw texture sheet it's self.
By sheer dumb flippin' luck, I found the original photo!