5.7 CHEVY GAS MILEAGE

[troy/co]

I was thinking on upgrading to a 1998,CHEVY,4x4,AT,1500,extended cab pick up with the 5.7 VORTEC. The truck has 24,000 miles on it. Has anyone had any experience with this type of vehicle? What kind of mileage can I expect while driving empty? Or, while pulling a boat?

Thanks in advance.

[Wambo]

My son has '95 Yukon 5.7 4x4 he gets around 15mpg (all around) when he pulls my boat it drops to around 10mpg.

I have '99 Yukon 5.7 Vortec 2x4 I average around 18 until I hook up the boat and then it drops to around 12.

[agt]

i pull with a 2000 ext cab with this motor-pulling a lund 1775 pro v ,i get 14 mpg on the highway,which is the same as in town mileage pulling no load ,havent checked highway no load but should be around 18

[Denied]

I have a 99 GMC Yukon 4x4 with 5.7 Vortex. On open road trips I get up to 18 mpg. In town it drops to 16. Don't pull my boat very far, 5 miles in spring and another 5 miles in the fall from storage to marina and back but the Yukon handles my 27 foot, 7000 pounds with no problems.

Fishing Western Lake Erie aboard "DENIED"
web page; http://www.cliftond.com

[WAeyes]

Anything 99' or newer should have the new 5.3 engine instead of the 5.7 350 engine. The 5.3 will give you more hp, torque, better mileage and all-around better truck. Worth it in my opinion.

[K Crowley]

I agree that the new 5.3 is probably a better all around motor, but I believe the torque specs on the 5.7 are better. I'm no gearhead, but this is what I found when I was deciding which motor to get last year.

The new 5.3 Vortec develops 285 HP with 325 ft/lbs of torque at 4000RPM,

The old 5.7 develops 255 HP with 330 ft/lbs of torque at 2800RPM.

[Jim]

I have a '95 silverado extended cab 4x4, all the options with 63000 miles and get around 14 mpg on the freeway with no load and around 11 pulling a 16' boat. A lot depends on the rear end gearing. Hope this helps.