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V8 4.8l Or 5.3l

varsis

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varsis Enthusiast

varsis

Posted
Posted

I plan on getting a chevy or GMC soon here depending on which i find. Is there that much difference between these engines? I plan on doing the lift . I am also getting 4x4 and etxd cab or crew. I know there is a bit of HP difference, I like my power though.

VMax2007 Senior Enthusiast

VMax2007

Posted
Posted
I plan on getting a chevy or GMC soon here depending on which i find. Is there that much difference between these engines? I plan on doing the lift . I am also getting 4x4 and etxd cab or crew. I know there is a bit of HP difference, I like my power though.

 

 

Neither!!! 6.0 Baby!!! 367 HP, 375 lb-ft and ONLY 1 MPG less than the 5.3. PLUS, for the roughly $1k price increase over the 5.3, you get a bigger/better engine with AFM and VVT (no AFM or VVT on 4.8 and no VVT on 5.3), HD tranny, HD 9.5" rear end, ext oil cooler, ext tranny cooler and (with Crewcab or Ext cab with Stabilitrak) you get 4 wheel disc brakes. No brainer!!!

varsis Enthusiast

varsis

Posted
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Posted

I won't be buying brand new. I will be buying used. I was looking at 03 chevy or 04 depending on what I find. I will be looking, but I am not sure I looked on there but with the aluminum block it added a fair bit. I don't have money to buy a brand new sierra though I would love to.

2000DV4.8 Senior Enthusiast

2000DV4.8

Posted
Posted

I have the 4.8L, and I wish I had gotten the 5.3. There's not really any mpg gain with the 4.8L, and sometimes it feels underpowered. Go for the 5.3.

plainvanilla Enthusiast

plainvanilla

Posted
Posted
I plan on getting a chevy or GMC soon here depending on which i find. Is there that much difference between these engines? I plan on doing the lift . I am also getting 4x4 and etxd cab or crew. I know there is a bit of HP difference, I like my power though.

 

 

Neither!!! 6.0 Baby!!! 367 HP, 375 lb-ft and ONLY 1 MPG less than the 5.3.

 

 

where did you get that from???? Unless you are figuring the fuel saving DOD tech.

My 5.3 gets 16 in town and 20.5 on the hiway. Your 6.0 gets 19 on the highway???

 

I'm not knocking the 6.0, great motor, but everyone I know with a 6.0 gets at best 16 on highway without DOD.

My 8.1 Burb with 3:73 is getting a little over 14 on highway.

 

My last truck an 05 Silverado had the 4.8 it got 20 MPG on highway and went I started thinking about towing my Jeep on a trailer to Colorado, It was going to be close to being too much for it with the 3:73 gear and then I was going to have to add everything for a tow package, hitch, tranny cooler...ect.

 

Do like these guys are saying get the 5.3 or the 6.0 with a tow package... you will not regret have a tow package if you need one or having the extra horses for only a modest loss of MPG

VMax2007 Senior Enthusiast

VMax2007

Posted
Posted
I plan on getting a chevy or GMC soon here depending on which i find. Is there that much difference between these engines? I plan on doing the lift . I am also getting 4x4 and etxd cab or crew. I know there is a bit of HP difference, I like my power though.

 

 

Neither!!! 6.0 Baby!!! 367 HP, 375 lb-ft and ONLY 1 MPG less than the 5.3.

 

 

where did you get that from???? Unless you are figuring the fuel saving DOD tech.

My 5.3 gets 16 in town and 20.5 on the hiway. Your 6.0 gets 19 on the highway???

 

I'm not knocking the 6.0, great motor, but everyone I know with a 6.0 gets at best 16 on highway without DOD.

My 8.1 Burb with 3:73 is getting a little over 14 on highway.

 

My last truck an 05 Silverado had the 4.8 it got 20 MPG on highway and went I started thinking about towing my Jeep on a trailer to Colorado, It was going to be close to being too much for it with the 3:73 gear and then I was going to have to add everything for a tow package, hitch, tranny cooler...ect.

 

Do like these guys are saying get the 5.3 or the 6.0 with a tow package... you will not regret have a tow package if you need one or having the extra horses for only a modest loss of MPG

 

 

I am basing it the EPA estimates, which I know are off, but they should be proportionate. 16/20 for the 5.3 and 15/19 for the 6.0.

 

Also, my 2000 Ext cab with the 5.3 only got 14 city and I am getting exactly 14 city with my new truck. I haven't logged any highway miles yet, so I do not know what my hwy mileage will be.

TEE Enthusiast

TEE

Posted
Posted

Those figures are off...

I get 20+MPG on an 04 GMC Sierra SCSB with 3.42 gear and my buddies 06' 6.0 ECSB barely gets 14 MPG.

Also that 5.3 will do anything you want it to do.

jhm Senior Enthusiast

jhm

Posted
Posted

I am basing it the EPA estimates, which I know are off, but they should be proportionate. 16/20 for the 5.3 and 15/19 for the 6.0.

 

Also, my 2000 Ext cab with the 5.3 only got 14 city and I am getting exactly 14 city with my new truck. I haven't logged any highway miles yet, so I do not know what my hwy mileage will be.

 

real world, 6.0l = 14 mpg highway

http://www.edmunds.com/apps/vdpcontainers/...82/pageNumber=1

plainvanilla Enthusiast

plainvanilla

Posted
Posted
Those figures are off...

I get 20+MPG on an 04 GMC Sierra SCSB with 3.42 gear and my buddies 06' 6.0 ECSB barely gets 14 MPG.

Also that 5.3 will do anything you want it to do.

 

 

If you hook up a 5000 lb trailer to a 5.3 with a 3.23 or similar gear and you will be wishing for a bigger motor about 1/2 way through your trip

plainvanilla Enthusiast

plainvanilla

Posted
Posted
I plan on getting a chevy or GMC soon here depending on which i find. Is there that much difference between these engines? I plan on doing the lift . I am also getting 4x4 and etxd cab or crew. I know there is a bit of HP difference, I like my power though.

 

 

Neither!!! 6.0 Baby!!! 367 HP, 375 lb-ft and ONLY 1 MPG less than the 5.3.

 

 

where did you get that from???? Unless you are figuring the fuel saving DOD tech.

My 5.3 gets 16 in town and 20.5 on the hiway. Your 6.0 gets 19 on the highway???

 

I'm not knocking the 6.0, great motor, but everyone I know with a 6.0 gets at best 16 on highway without DOD.

My 8.1 Burb with 3:73 is getting a little over 14 on highway.

 

My last truck an 05 Silverado had the 4.8 it got 20 MPG on highway and went I started thinking about towing my Jeep on a trailer to Colorado, It was going to be close to being too much for it with the 3:73 gear and then I was going to have to add everything for a tow package, hitch, tranny cooler...ect.

 

Do like these guys are saying get the 5.3 or the 6.0 with a tow package... you will not regret have a tow package if you need one or having the extra horses for only a modest loss of MPG

 

 

I am basing it the EPA estimates, which I know are off, but they should be proportionate. 16/20 for the 5.3 and 15/19 for the 6.0.

 

Also, my 2000 Ext cab with the 5.3 only got 14 city and I am getting exactly 14 city with my new truck. I haven't logged any highway miles yet, so I do not know what my hwy mileage will be.

 

 

Yeah, the newer EPA figures are supposed to me way more accurate, but I don't know yet.

 

My sticker on my 07 Classic said 16/21 and I am getting withing 1 MPG of that consistently

I know another guy with a 6.0 Vortec Max Crew 4X4, I'll ask him what he's getting highway.

That Max is one baaad engine :)

wages999 Enthusiast

wages999

Posted
Posted

In '04, the first year for the 1500 Crew Cab, they came standard with a 5.3 and 3.73 rear-end. This is a nice combination for daily driving and some towing. Look for a truck with a locking differential (the only other option I wish I had).

 

When I was looking for a truck in '04, one dealer did not have any trucks with the 4.8 in them. A salesman told me that the 5.3 only cost you 1mpg and $600 on the window sticker, but was a much more powerful motor.

VMax2007 Senior Enthusiast

VMax2007

Posted
Posted

 

Not on the 2007 NBS's. I should know, I have one and I get 14 mpg ALL city driving. 6.0 Vmax with 3.73's. Haven't driven any significant hwy miles yet, so I do not know what my hwy mpg will be yet, but I am guessing around 17-18mpg based on my experience with my old 5.3. I got about 17 hwy with the 5.3 without AFM or VVT.

jhm Senior Enthusiast

jhm

Posted
Posted

 

Not on the 2007 NBS's. I should know, I have one and I get 14 mpg ALL city driving. 6.0 Vmax with 3.73's. Haven't driven any significant hwy miles yet, so I do not know what my hwy mpg will be yet, but I am guessing around 17-18mpg based on my experience with my old 5.3. I got about 17 hwy with the 5.3 without AFM or VVT.

 

With official EPA mileage ratings of 15 city and 19 highway, the 6.0-liter V8 boasts better numbers than any of its competitors. Much of it has to do with GM's Active Fuel Management system which shuts down half the cylinders under light load. Apparently going 75 mph on the highway doesn't make much use of that feature as we only managed 14.1 mpg on our round-trip to Vegas.

 

This is the NBS they tested. Maybe staying under 75 mph will help.

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