Just had G30 recall. You will love it.
Cranked up the truck, overhead reading 11.2mpg.
Drove out of parking lot, overhead went immediately to 9.5mpg, stayed there for 1 mile, pulled onto Interstate, set cruise at 65mph. Drove for 6 miles on fairly level road. Overhead steadily increased all the way to 18.9mpg. As I climbed very slight hill the overhead fell slowly to 18.1mpg.
It seems overhead is much more sensitive. My truck has never ran in 18's that long.
Great going DC.

 

let us know what you get when you check it by hand. It would make a big difference to meif I buy a new pickup, if they were getting 18 mpg

 

I don't know...sounds like they reset the overhead just before you drove it off. I notice the overhead mileage varies widely after a reset. It requires several hundred miles to level off at which time it seems pretty accurate (at least for me). I don't believe we will see great mileage improvements for G30 recall. It uses the same flash that I got in Sept (AU version). I'm still getting 14 city 17 hwy after 2000 miles.

Hopefully I am wrong though!

 

I don't see this recall improving much. It replaces the RRT/TSBthats already been out for several months. Is it possible the O2 module could improve something? The recall only says that the old module maynot report error conditions.

 

I think it is a little more in-depth than that.

Exact wording:
The OBD system on about 74,000 of the above vehicles may not detect a failed oxygen sensor or illuminate the malfunction indicator light as required. In addition, the OBD system may cause these trucks to fail an inspection maintenance (readiness) test and may not store mileage as required for certain tranny faults. (note) new software will also improve vehicle driveability and reduce potential for soot accumulation in DPF. (paraphrased).