Tires/mileage advice

[Murf]

I'd like to change out the 245's on my GMC Duramax to 265's - how is that going to affect my fuel milage and towing capability?

Do I need to reset the computer and if so how do I do that -

Thanks
M.

[DmaxMaverick]

Murf

You already have this post in the Accessories forum, which is appropriate. You should get good replies there.

I'm Closing this topic.