Please post your gas mileage with 5.3 and 6.0 liters.
 

Want a new GMC or Chevy pick-up,need a 4 door want a 2500hd with 6.0 and 3.73 gears or 1500 4 door with a 5.3 and 3.73 gears also want 4 wheel drive but my just get 2 wheel drive.I have heard different mpg figures on either, varying from good to not too good please post your gas mileage and describe the type of driving you do most.You know stop and go ,highway , towing a load(as I will be towing about 4000 lb load.Please post even if very brief. :hail: THANKS!!!!!!!

03 2500HD xtra cab. With 4.11's and 33" tires. It gets about low 11's around town and about mid 13's on the freeway. I do drive it hard though so I am sure there are people out there getting better than that.

Same here but with 35" tires. Even when stock the 6.0 only got about 11 around town and 13-14 on the highway empty. Towing 5000+ lbs it drops to about 8-10 mpg. IMHO From my experience if I were to buy another 2500HD I'd just go for the big block or diesel. If you not towing often, or more than 5,000 lbs stick with a 1/2 ton, they are almost 1000lbs lighter you will get much better milage empty if that is your main concern, not to mention the cushy ride.

trucksred
 

i had an 03 1500hd lt. i traded it for an 04 ecsb, std.2500. 03 got 11 -12 mixed and 15 on highway.i did have a few goodies on it though.the 04 gets 13.5 mixed and over 17 on hw. both trucks are 8600 gvwr,3.73 gears.didn't take a pic. of the new one yet but here is the 03,good luck.

i got an SS Silverado. 6.0 liter LQ9, with 4.10's. after some tuning i am getting about 14 in the city and 16-17 on the highway.

i do have a seperate tune i use for long drives (200+miles) that allows me to get 19mpg.

04 Sierra Extended cab short bed, 5.3, 4x4, 3.73 Auto with blower 19.2 crusing about 75-80

I get about 10 towing a 5000 lb trailer 75 - 80 mph. I can get 15.8 on the hwy empty if I keep the speed to 70 mph. I get 12-13 mpg in general driving in the summer and about 11-12 mpg in the winter.

HTH

Stock 03 Sierra z71 ext cab, 3.73/Tonneau- 15.6 city 18 hway.
Step side- 15-16 doesn't matter

I get 13.5 mixed city and highway with my stock 03 ss :)

'03 Chvey Avalanche 5.3 w/3:73's. I drive this around 35k per year. Mainly highway/expressway (60-65, 75-80 respectively). I get around 19 avg. highway expressway and around 12 city. Overall avg. according to GM computer 16.5.

Good luck in your decision.