Gotta see if general at2 come in that. Maybe load range d. Little tougher for off road.
I doubt your truck would notice the difference between load range D and E 33" tires. The weight is not that great between the two. Most of the weight gain is from the 33" and even a C or D tire is still a light duty truck (read heavy) tire.
I think you would tell most if you switch to 31.5" D tires but if you aren't willing to go that much smaller than just accept the weight and the risks.
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