6.2 to 5.3

[Cbark2305]

has anyone ever swapped from a 6.2 to a 5.3?

 

[thompsoj22]

has anyone ever swapped from a 6.2 to a 5.3?

if i had the choice between a brand new "FREE" crate motor in the 5.3 displacement or having to pay the $3500 for a quality 6.2 reman id absolutely choose the reman in 6.2. I am not bashing on the 5.3 just questioning why you would want to go backwards in displacement?

 

[Cbark2305]

if i had the choice between a brand new "FREE" crate motor in the 5.3 displacement or having to pay the $3500 for a quality 6.2 reman id absolutely choose the reman in 6.2. I am not bashing on the 5.3 just questioning why you would want to go backwards in displacement?

She’s a pig! We only drive it short trips around town when I have my other kids and with premium fuel I get 10.3 my old 03 suburban got 14-15 ish on low grade

 

[mikeyss]

She’s a pig! We only drive it short trips around town when I have my other kids and with premium fuel I get 10.3 my old 03 suburban got 14-15 ish on low grade

My 05 Tahoe 5.3 gets worse mileage than my 09 Tahoe 6.2
I do alot of city driving, the 05 struggles with 11mpg, while the 09 is almost 13mpg. However, as of lately I run E85 in my 6.2 and I get 10mpg at best in the city, but I only spend $2.33 a gallon for E85 and it still lasts 2 weeks just like running premium did.

 

[Mrsteef]

I’m around 13.9-14.2 with my 09’ 5.3

 

[mikeyss]

Honestly I don't think the mileage between a 5.3 and a 6.2 are that different, definitely not enough to justify an entire engine swap.

 

[thompsoj22]

She’s a pig! We only drive it short trips around town when I have my other kids and with premium fuel I get 10.3 my old 03 suburban got 14-15 ish on low grade

I get it, but consider the cargo your carrying safely, comfortably, entertained and the cost to transport your world in comfort isnt that bad. Lease a steer and go "stripped" econobox like a corolla/kia for <$199 per month and use it for the short trips, you wont exceed your miles if you dont take road trips with it. Every family should have a 30+ mpg car in their driveway.

 

[kbuskill]

She’s a pig! We only drive it short trips around town when I have my other kids and with premium fuel I get 10.3 my old 03 suburban got 14-15 ish on low grade

Your right foot dictates a lot of your mileage however there are other factors to consider.

Mileage/condition of engine.
Tune up. (Plugs, wires, air filter, fluids)
Inflation of tires.
And perhaps most importantly what gear ratio resides in the rear end of the vehicle.

My 08 Suburban with 220k miles has the 5.3L/4 speed and a 3:73 rear end gets about 13-14 MPG around town on 89 oct which is what it is tuned for. This is with AFM tuned out.

On the interstate it gets about 17-19 cruising 70-75. If the truck had a 3:42 or 3:08 rear end it would probably exceed 20 MPG on the highway.

On E85 I only get 9.5-10 MPG in town and about 13-14 interstate.

 

[Doubeleive]

lol, sounds like you drive like me, my DIC is pretty much dead set on 10.4 (2012 6.2l Denali xl), I can make it go up by adjusting the lead in my foot

 

[Cbark2305]

This is strictly my wife’s vehicle I have never driven it (for certain reason) I drive my duramax and that’s it. She does have a heavy foot but dang 10 it’s crazy to me. She has her work car that gets 28 but it a turd and I refuse to ride in it. Broke flex pipe makes it sound great....I guess it’s time to buy a car for the weeks we don’t have all the boys

 

[iamdub]

This is strictly my wife’s vehicle I have never driven it (for certain reason) I drive my duramax and that’s it. She does have a heavy foot but dang 10 it’s crazy to me. She has her work car that gets 28 but it a turd and I refuse to ride in it. Broke flex pipe makes it sound great....I guess it’s time to buy a car for the weeks we don’t have all the boys

Where are you located and how many miles on the 6.2?

 

[Cbark2305]

Where are you located and how many miles on the 6.2?

South of Chicago 60 miles....I think 115-120k

 

[iamdub]

South of Chicago 60 miles....I think 115-120k

Well, shit. Too far.

 

[kbuskill]

Put a block of wood under the pedal on the right and watch the mileage go up... lol

5.3 won't get any better mileage driving like that... truck weighs the same but would have less engine to get the same amount of work done so it would be working harder.

 

[PG01]

Yes, it can be done easily. Every thing bolts right up, you may need to adust the tune tho. They are

lol, sounds like you drive like me, my DIC is pretty much dead set on 10.4 (2012 6.2l Denali xl), I can make it go up by adjusting the lead in my foot

sorry about your dic.....

 

[Cbark2305]

Would a black bear tune help out?

 

[Cbark2305]

Having a hard time justifying spending $600 for autocal

 

[Tonyrodz]

Having a hard time justifying spending $600 for autocal

I'd say yes. Guys report better mpg, as long as you keep your foot out of it. Def better spg!

 

[adventurenali92]

Small city trips are going to be hard for the 6.2. Constantly stopping and starting, slow moving traffic is never going to get you good gas mileage. If you’re really concerned about fuel economy get your wife a submarine outback wagon. Room for the kids and still decent fuel mileage. The Denali 6.2 is made for long hauls. That being said a black bear tune will definitely help! Worth the expense!

 

[Tonyrodz]

Small city trips are going to be hard for the 6.2. Constantly stopping and starting, slow moving traffic is never going to get you good gas mileage. If you’re really concerned about fuel economy get your wife a submarine outback wagon. Room for the kids and still decent fuel mileage. The Denali 6.2 is made for long hauls. That being said a black bear tune will definitely help! Worth the expense!

Submarine Outback?