Gonna admit some ignorance here, what's an Atlas engine? I need to know...

 

I was surprised with the 60 ft.'s myself. Not going to lie.

Atlas would be the I4/I5/I6 GM engines, that started in the early 00's. VVT on the exhaust side, no egr. LK5/L52's were available in the '05 Colorado.

 

Ahh, I should've known that, seeing how I worked for GM when those came out.....

We hated/loved those first gen 5 cylinders. Hated all the cylinder head/valve guide problems they had. But loved the commissions on them.

When I read the word Atlas, I immediately thought of the badass Atlas transfer cases. lol

 

They are a bitch to work on, IMO. Parts were too expensive, I had to replace the head on mine, and I had to pull the whole damn left side of the truck off (it seemed like) just to get to the thermostat. Maybe I just frustrated too quickly, but I couldn't stand working on it. On nitrous, the little truck was quite a trip, though. Held up to a 125 shot. And no, no Atlas transfer case.

 

I am on my second set of Hankook ST 275/55/20's. The first set lasted 50k miles, I still had some life left but I punctured a sidewall and just replaced all 4 tires.