DTRLs Don't work..

both Cdn and US model trucks are made at the same plant. I have a 2005 with DTRL, and no lens melt/discolor problem. I have since 2013 switched to LEDs though.

One of the other differences I believe is CDN trucks came with 3+1 rear leaf springs, no Toyota Service Bulletin required to replace weaker 2+1 rear springs. Odd,perhaps they expected Canadians would use their trucks as trucks to haul stuff.

 

The Canadian trucks came with daytime running lights as per the Canadian regulations. The US regulations at that time didn't have the requirement,but you could still get them if you wanted.And Some people got the part number for them and ordered the relay and installed it themselves. The people who have the trouble melting things in the light are generally in the hotter southern climates.