E load tires on a half ton? Probably overkill.
That being said, I went to an E load tire on my half ton Burb. Wasn't available in the OE size (265/70/16), so I got a slightly smaller tire (245/75/16). Wanted the extra sidewall strength for towing and offroad driving.
You can have your PCM retuned to make the speedo accurate once again. I never did. It was off by roughly 3% on the high side.
Added side benefit - a sligtly smaller tire is like slightly increasing your axle ratio - should help a little bit when towing a big trailer.
