Well with gasoline prices approaching $5.00/gal.(US) I am starting to play around with the DOD settings in my '07 Tahoe 5.3L/4L60 in an attempt to keep it activated a bit longer. Currently I have B0960 at 12 and am going to adjust B0950/B0951 in the 1300-2300rpm range for 4th gear by roughly a value of 5. I probably will have to play with the vacuum settings but am using 5 as a base starting point. Anybody have any experience playing around with these settings also looking at adjusting the AFM min/max rpms in 4th gear. the reason I say 4th gear is I have yet to see 4cyl. mode activate in 3rd, is this normal? Any help would be appreciated, I'm just looking for a bit better mpg's without sacrificing too much driveability or power.