Finally Got One

[heavyduty guy]

just got a 02 lt ec sb 4x4 looks like new with 50000 miles on it,been looking for this truck for over 8 months has never had a brake box installed in it,kinda bummed out on the gas mileage it has 410 gears and i drove right at 400 miles between 60 and 80 and it averaged 9.5 mph,is this normal?it seemed to kinda have a miss in it when going up hills could just notice it slightly but it did seem to be missing under a load but it idels unbeleivable smooth,could this be plugs,wires coil are all?forgot to mention it has 265 goodyear trackers thanks oh it has a 6.0

[Shaners]

9.5 MPG is low for that truck on the highway when empty. I would expect 14-16 MPG's under those conditions.

 

The 265's are not the stock size tires for that truck, so if you didn't add in the calculations for the larger tires, then you milage was a little better than what you figured, but not as good as it should have been.

[Zembonez]

9.5 MPG is low for that truck on the highway when empty.

 

I agree. From everything I have read in here 12 MPG is about the lowest anybody is getting (highway) with your setup.

[Silverado4x4]

When I had my 6.0 2500 it would get 13 on the highway and about 9-10 around town unloaded.

[heavyduty guy]

When I had my 6.0 2500 it would get 13 on the highway and about 9-10 around town unloaded.

i would settle for 13,gonna change plugs and wires this week to see if that helps

[ws6_guy]

congrats on the new truck.

 

I get 13.9 with daily driving I dont floor it and stuff so thats probably why haha

[fourwheelinfool]

Congrats! '02 is the last great model year IMHO.

 

Sorry to all you NBS guys.

 

Anyways, the first thing I would do is run some sea-foam in the oil to de-carbonize the engine, sea-foam in the fuel, sea-foam in the throttle body (I'm doing this now... wish I didn't wait!) and change the plugs.

 

FYI, I get 14mpg average, almost 18 on the highway and somewheres between 8-10 in the city. I bought my '02 with only 34k on it so I'm just now getting around to doing engine maitenence, should have started sooner...

 

 

PS: Change all your fluids too. Diffs, coolant, t-case, tranny, etc... 5 years is old when you don't know how it was maintained.

 

The 6.0L is a monster!