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How Do You Like Your 4.8l

sledneck_03

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jbannick18 Enthusiast

jbannick18

Posted
Posted

I get 10 mpg towing a 6x12 trailer totally about 3k lbs around the city, and thats with 3.23 ratios. I want to switch to 3.73's soon. Fuel mileage is a laughable selling point for a v8 engine imo.

 

Truck is a 08 Sierra CC, I wish mpg was the only thing I could complain about this truck :M16:

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VMaxtastic Enthusiast

VMaxtastic

Posted
Posted

I had a 2000 Sierra with a 4.8... Tranny and rear dif both went, motor lasted to 415,000 km when I sold it.. Not that great on gas, kicked down constantly in overdrive, especially in a high wind or uphill

Battou62 Enthusiast

Battou62

Posted
Posted

The 4.8 is a very capable engine as long as your not doing frequent heavy towing. I wanted to get a Sierra crew cab for as cheap as possible when I was looking for a new truck. Not to mention I am getting close to 19-20 MPG cruising the interstate at 65 mph. Mine is a 2009 so it has the 4 speed transmission, which will downshift a lot when climbing hills. It would be perfect with a 6 speed transmission.

Jim L Enthusiast

Jim L

Posted
Posted

Our new command vehicle at the fire dept is a 2012 4.L and my personal truck is a 2012 LTZ with the 6.2L and what a diff. That 4.8l is a dog for me and way underpowered. Makes me love my 6.2L even more. I have that motor becasue I pull a boat every weekend.

ujtruck Enthusiast

ujtruck

Posted
Posted

4.8 is good, but take it easy its not a dump truck

sshoureas Enthusiast

sshoureas

Posted
Posted

From everything I've heard from those with the 4.8L, it's a good engine and lasts as well as the 5.3L. On the flip side, it doesn't get any better gas mileage and hte re-sale tends to be lower on 4.8L trucks than 5.3s. So, the benefit is the $800 savings up front but more than lost on the back end plus less towing/hauling capabilty. An equation that doesn't add up for me but still a fine engine.

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