Reflash available for 2Gen Taco?

No, haven't done a search, too tired and lazy.

Just curious if there is a chip or reflash available for the 2Gen ECU. Not necessarily for better performance, but to improve the abysmal gas mileage. If I get better performance, too, it's a plus, but the truck runs great, really hauls ass when you put your foot in it, but gets 16-17 mpg at best when you try to tip-toe on the long skinny pedal. My nephew's Montana gets 20 without trying.

When I tow, my mileage is worse than the 454 I had in my old 1-ton Chevy, and I didn't think it could be worse than that.