is the tank size different on a short bed excab vs a shortbed regcab? i'm pretty sure mine is a 23 gallon tank and i usually avg. 345mi on a tank.

 

Take your MAF out and clean it with some contact cleaner and run a tank or two of premium through it with some fuel injector cleaner. If that don't help call the freakin police man!!! My truck withan STS @5psi is getting 18mpg with mixed driving!

 

Remember a half tank on a Chevy Truck as far as the gas gauge goes is anybodies bet and open to discussion!!!LOL

 

I know the 04-05 RCSB & ECSB are both 26 gallon.

 

**** i got the 4.8 5spd, i get 17.2-17.6mpg...almost 100% city driving...and i drive ROUGH...i think if i didnt get on it at almost every light i could hit 20mpg lol...im a lead foot driver...wonder what my mpg will be once i get 33's adn 4.56 gears..

 

my gas mileage got a LOT better with the flowmaster. the intake helped gas mileage a little too.

 

All the short beds have a 26 gallon tank.

 

Ive got an 01 ECSB with 5.3 and mods listed below and I get 15 to 15.5mpg in the city and I plan on putting long tube headers on, will that help my mpg.

 

I have an 04 ecsb Z71 with the 4.8 and 3.73 gears. Just got it 3 weeks ago and have seen numbers of 16.6, 17.5, and 17.6, all being mixed driving. I am fairly happy thus far, but am hoping that a tune and exhaust will better my mpg.

The 3.42 guys will definately see better gas mileage than the 3.73 guys.

I try to stay out of mine, but Im sure that will change for a little while once I get my tune.

 

Well my LQ9 6.0 VHO truck has 3.73 gears. I seem to be getting just as good as everyone else, if not better. The 16-18 city & 19-21 hwy that I'm getting seem very impressive for this truck. I would have never of thought it would get these kind of MPG numbers.

Jim