2003 2500 HD ratio vs. mileage

drewis · September 26, 2003

Would a rear end ratio change from 4:10 to 3:73 make a noticeable improvement in fuel mileage? I am currently getting 10 mpg with my 6.0. My father has an 03 1500 HD four door and is getting 15.

Exactly what rear end is in the 2500HD?

c5hd · September 26, 2003

3.73s shouldget better mileage. But I don't know how much

I think all motors exempt the Duramax can have either ratio. Duramax is only 3.73

SxViper · September 26, 2003

With the 6.0 you can only get the 4.10.... Your only getting 10 MPG... You hamer on that thing or do a lot of city driving? I get 14 with a CC long box 2500HD...

1BADHD · September 26, 2003

What you will save in milage, isnt worth the $$$$$ spent on a gear swap. if anything, talk to Lyndon at Westers Garage and get a 87 Octane Maximun Economy tune. You will pick up 4-5 mpg for $500.

bigj · September 26, 2003

My 02 2500HD crew 4.10 geared beast got 11.5 ave.

Now my 03 1500HD crew 3.73 gets a whooping 12.0 ave.

Love the truck,Guess I did'nt buy it for milage.

BlackSilver · September 26, 2003

My 02 2500HD crew 4.10 geared beast got 11.5 ave.Now my 03 1500HD crew 3.73 gets a whooping 12.0 ave.

You don't mention if that's loaded or empty. My 03 2500HD ext-cab gets 20MPG empty and 12.5MPG pulling a 4-ton 5th wheel. If you're getting that mileage empty, then something is farkled up.

Threejaws · September 27, 2003

Sure is fun to hammer it though.

Threejaws · September 27, 2003

I get around 10 in town and 12 on the highway with 4.10's.

SxViper · September 27, 2003

What you will save in milage, isnt worth the $$$$$ spent on a gear swap. if anything, talk to Lyndon at Westers Garage and get a 87 Octane Maximun Economy tune. You will pick up 4-5 mpg for $500.

4-5 MPG?? With the webster... That seems a little high to me.. I thought it was more like maybe 1-2 mpg... Has anyone put one of these in their 6.0 yet? I am thinking of doing it this coming spring with the tax return...

Bob G. · September 28, 2003

My 1500HD w/3.73s gets 13mpg to 16mpg when not towing. I don't check it towing since I usually tow 20 - 30 miles one way with a boat. The 6.0L sure is fun when you gotta pass someone!

Bob G.

SxViper · September 28, 2003

Hey Bob did you make that anttena mount your self? Or is that one you bought?

1BADHD · September 29, 2003

What you will save in milage, isnt worth the $$$$$ spent on a gear swap. if anything, talk to Lyndon at Westers Garage and get a 87 Octane Maximun Economy tune. You will pick up 4-5 mpg for $500.

4-5 MPG?? With the webster... That seems a little high to me.. I thought it was more like maybe 1-2 mpg... Has anyone put one of these in their 6.0 yet? I am thinking of doing it this coming spring with the tax return...

Yeah. I did. That is why I am posting those numbers. Got questions...ask away. I was getting 10-11 at best before the tune. I ordered the MAX hp tune. NOT the economy tune. I am getting a average of 14-14.5 now.

The average MPG for a 6,0 is 10-12. If anyone is getting 18-20 is a odd ball. Not saying it cant happen, just not normal. I didnt buy a truck for mileage. I bought it to drive. And drive I do.

04Chevy2500HD · September 29, 2003

I get about 11.5-13.0 on mine... Just depends on how nice I am to it.

-David

SxViper · September 29, 2003

What you will save in milage, isnt worth the $$$$$ spent on a gear swap. if anything, talk to Lyndon at Westers Garage and get a 87 Octane Maximun Economy tune. You will pick up 4-5 mpg for $500.

4-5 MPG?? With the webster... That seems a little high to me.. I thought it was more like maybe 1-2 mpg... Has anyone put one of these in their 6.0 yet? I am thinking of doing it this coming spring with the tax return...

Yeah. I did. That is why I am posting those numbers. Got questions...ask away. I was getting 10-11 at best before the tune. I ordered the MAX hp tune. NOT the economy tune. I am getting a average of 14-14.5 now.

The average MPG for a 6,0 is 10-12. If anyone is getting 18-20 is a odd ball. Not saying it cant happen, just not normal. I didnt buy a truck for mileage. I bought it to drive. And drive I do.

I can get over 14 with out the webster... I normaly get about 13 with mixed driving.. This is a 2500HD 6.0L 4.10 CC LB... So the webster should get me?????

1BADHD · September 29, 2003

What you will save in milage, isnt worth the $$$$$ spent on a gear swap. if anything, talk to Lyndon at Westers Garage and get a 87 Octane Maximun Economy tune. You will pick up 4-5 mpg for $500.

4-5 MPG?? With the webster... That seems a little high to me.. I thought it was more like maybe 1-2 mpg... Has anyone put one of these in their 6.0 yet? I am thinking of doing it this coming spring with the tax return...

Yeah. I did. That is why I am posting those numbers. Got questions...ask away. I was getting 10-11 at best before the tune. I ordered the MAX hp tune. NOT the economy tune. I am getting a average of 14-14.5 now.

The average MPG for a 6,0 is 10-12. If anyone is getting 18-20 is a odd ball. Not saying it cant happen, just not normal. I didnt buy a truck for mileage. I bought it to drive. And drive I do.

I can get over 14 with out the webster... I normaly get about 13 with mixed driving.. This is a 2500HD 6.0L 4.10 CC LB... So the webster should get me?????

If you get the economy 87 Octane tune, I would not be surprised if you get 17-18 mpg. I really cant say for sure. I just know that with MAX hp tune and 93 Octane, I got antoher 3-4 mpg. Remeber, no matter which one you get, your still going to get a huge performance gain!