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#1
02-23-2009, 05:25 PM
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2003 Silverado 2500HD 6.0 L fuel mileage
Can anyone give me an average fule mileage for the 2003 2500HD with the 6.0 L gasoline engine, interested in the ext. cab long bed 4WD version.
Bert 
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#2
02-23-2009, 06:07 PM
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Re: 2003 Silverado 2500HD 6.0 L fuel mileage
There was a thread posted on here somewhere. ( sorry, I can't remember what it's titled) But there was several people saying they were averaging between 12 - 14 mpg. If you can get by with a little less truck I would suggest a 1500HD. I just picked up an '02 crew cab the other week with the 6.0 in it and I'm getting just over 17mpg on the highway after installing new plugs. City and highway combined I'm at about 14.5 average. Not quite built as heavy as a 2500 but It'll work almost as hard.
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#3
02-23-2009, 07:00 PM
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Re: 2003 Silverado 2500HD 6.0 L fuel mileage
On my '03 2500HD Crew Cab, I'm getting 14 - 15 m.p.g. with about 50/50 highway/city daily driving, but I drive like a grandma.
__________________
2003 Chevrolet Silverado 2500HD 6.0 CC SB 4X4
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#4
02-25-2009, 02:32 PM
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Re: 2003 Silverado 2500HD 6.0 L fuel mileage
I have a 2004 2500 crew cab with 6.0, averaging 13.1MPG over the 110k miles driven so far.
My brother in law has an '05 extened cab longbed 6.0 and gets 14.5MPG. He is easier on the go pedal than I am. Last edited by sassydog; 02-25-2009 at 02:34 PM. Reason: Edited to add bil info
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#5
04-09-2009, 12:43 PM
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Re: 2003 Silverado 2500HD 6.0 L fuel mileage
I have a 1500 hd, short box crew. great truck. does every thing i need just like a 2500. gas mileage is 10 in city drivelike a grandma, used to get 13 in city . highway i am lucky to get 13 , used to get 16 on highway. 90k miles .HELP. bought this brand new and is an excellent truck. can i improve the mileage?
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#7
04-10-2009, 07:59 AM
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Re: 2003 Silverado 2500HD 6.0 L fuel mileage
Quote:
Bert
__________________
My Truck: 2000 Silverado,, Z71 5.3 Ext. Cab, Long Bed Original motor + transmission! As of 3/21/14, I'm at 266,300+ miles! My wife's Truck: 2005 F150 Lariat CrewCab (Way nicer them my truck!)
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#8
04-10-2009, 01:45 PM
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Re: 2003 Silverado 2500HD 6.0 L fuel mileage
the main difference is from the front bumper to directly above the rear axle, completely 3/4 ton frame,drivetrain,susp,brakes and all. from the rear bumper to directly above the rear axle the frame is notched and sized down to a 1/2 ton frame. the reason being is to have the whole 1/2 ton crew sit lower and also to qualify for 1/2 ton insurance not 3/4. like i said the complete drive train and all is identical to 3/4 ton, and all parts at the parts retailer need to be looked up as if were a 3/4 ton truck. all towing and payload is within just a couple hundred pounds of the 2500hd, but thousands greater than a standard 1500. great truck for towing, i have a 10k lb 5th wheel i tow everywhere and a 8500gvw car hauler too. standard 1500 cannot tow these.
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