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**LEEVON** · 02-01-2011, 04:31 PM

15.8mpg 2008 ccsb 5.3L w/ AFM, 3.42 gears, 2wd. That's a 2 month average, mixed driving.

Honestly thought it would be a little better with the AFM. My brother in law gets just above 16 in his identical truck that's 4x4 (I've seen his driver center).

Don't believe the "other people". Guys always tell me they get 18,19,20 mpg in their trucks but you never know what/when they're talking about. I can jump on the highway, drive for 2 hours and get 19mpg but it's not realistic because you have to get off the highway, you know? I've had a bunch of the GenIII and GenIV 5.3L's in SUV's and trucks and never gotten better than 15mpg average. In fact my 4.8L 2wd 2008 got about 14mpg w/ 3.08 gears.

02-01-2011, 04:31 PM	#3
LEEVON Registered User Join Date: Jul 2006 Location: Ozark, MO Posts: 4,887	Re: what are you guys getting for mpg? 15.8mpg 2008 ccsb 5.3L w/ AFM, 3.42 gears, 2wd. That's a 2 month average, mixed driving. Honestly thought it would be a little better with the AFM. My brother in law gets just above 16 in his identical truck that's 4x4 (I've seen his driver center). Don't believe the "other people". Guys always tell me they get 18,19,20 mpg in their trucks but you never know what/when they're talking about. I can jump on the highway, drive for 2 hours and get 19mpg but it's not realistic because you have to get off the highway, you know? I've had a bunch of the GenIII and GenIV 5.3L's in SUV's and trucks and never gotten better than 15mpg average. In fact my 4.8L 2wd 2008 got about 14mpg w/ 3.08 gears. __________________ '20 Silverado Trail Boss ~ '17 Tahoe ~ '79 K15 Sierra Grande ~ '76 Blazer 2wd ~ '71 Cheyenne swb ~ '55 Pontiac Safari ~'50 3100 bagged ~ '80 Wife ~ Late model kids Last edited by LEEVON; 02-01-2011 at 04:37 PM.