Please post your gas mileage with 5.3 and 6.0 liters.
08-26-2004 | 12:32 AM
#31
Teching In
Joined: Apr 2002
Posts: 26
Likes: 0
From: Fort Worth, Texas
2004 Crew Cab Z-71 5.3l 3.73
2004 Crew Cab Z-71 5.3l 3.73 Stock 2350 miles 18.6mpg me driving on hwy-16.6 city. I drive it hard!! 
Wife driving on a trip got 19.9 hwy(she drives like my Grandmother) 
...JohnB
Wife driving on a trip got 19.9 hwy(she drives like my Grandmother) ...JohnB
08-26-2004 | 12:35 AM
#32
12 Second Truck Club
Joined: Feb 2002
Posts: 5,575
Likes: 0
From: Sacramento, CA
With my old mods N/A:
226/.535/112 cam
Volant Intake
TT3000
gutted cats
AS&M long tubes
300lbs or so weight reduction
electric fans
83k miles on the motor
I got 15.5mpg on average with mostly freeway driving but at 80-90mph and fairly agressive driving
Bone stock I think the best I got was close to 17mpg but that dropped with high miles.
226/.535/112 cam
Volant Intake
TT3000
gutted cats
AS&M long tubes
300lbs or so weight reduction
electric fans
83k miles on the motor
I got 15.5mpg on average with mostly freeway driving but at 80-90mph and fairly agressive driving
Bone stock I think the best I got was close to 17mpg but that dropped with high miles.
08-27-2004 | 09:51 PM
#35
On The Tree
Joined: Aug 2004
Posts: 155
Likes: 0
From: Tempe, AZ
'00 RCSB 4x4 with 5.3L stock motor running through 3.73's ... 285/16 Michilens... 33" 
I get around 14 city/mixed and 17-17.5ish on the highway.
I used to get 14.5-15 city/mixed and 18.5 on the highway with the stock 245's. I'm ok with the worse mileage..
Matt
I get around 14 city/mixed and 17-17.5ish on the highway.
I used to get 14.5-15 city/mixed and 18.5 on the highway with the stock 245's. I'm ok with the worse mileage..
Matt
08-27-2004 | 10:48 PM
#36
TECH Fanatic
Joined: May 2004
Posts: 1,125
Likes: 0
From: Lincoln, NE
03 1500 with the 5.3. Bone Stock except for 285/75. 14-15 in town. 18-20 hywy. when i pull my 27ft camper, pushin it a little harder than i probably should 8-10mpg. Has anyone else heard the with the new 4dr 1500 you cannot pull a fifth wheel or gooseneck? i was told this so i thought it may be helpful for someone else.
08-28-2004 | 03:32 PM
#37
TECH Apprentice
Joined: Mar 2004
Posts: 361
Likes: 0
From: Ontario, Canada
stock RCSB Z71 5.3L = 14.5-14.9mpg
stock 5.3L predator tuned, UPD intake, 40 series muffler = 16mpg
5.3L with the above plus comp cam 212/218 = 14.7-15.5mpg
Current setup, 6.0L and stall = 14.3-15mpg
Current setup on 330KM trip at 130k/hr or 80mph = 18mpg
stock 5.3L predator tuned, UPD intake, 40 series muffler = 16mpg
5.3L with the above plus comp cam 212/218 = 14.7-15.5mpg
Current setup, 6.0L and stall = 14.3-15mpg
Current setup on 330KM trip at 130k/hr or 80mph = 18mpg
08-28-2004 | 09:48 PM
#38
The only mods I have are a throttle body, K&N intake, and headers. I have not noticed any change in my gas mileage.
I get 17 around town and 22 on the highway. My daily commute on I-95 to northern Virginia (usually around 80mph) is 57 miles one way and I get a consistent 19.8 mpg (because of the mixture and highway/city driving).
I get 17 around town and 22 on the highway. My daily commute on I-95 to northern Virginia (usually around 80mph) is 57 miles one way and I get a consistent 19.8 mpg (because of the mixture and highway/city driving).
08-30-2004 | 09:30 AM
#39
14 Second Truck Club
Joined: Dec 2003
Posts: 1,188
Likes: 1
From: Houma, Louisiana
Originally Posted by diehardchevy
03 1500 with the 5.3. Bone Stock except for 285/75. 14-15 in town. 18-20 hywy. when i pull my 27ft camper, pushin it a little harder than i probably should 8-10mpg. Has anyone else heard the with the new 4dr 1500 you cannot pull a fifth wheel or gooseneck? i was told this so i thought it may be helpful for someone else.
08-30-2004 | 10:59 AM
#40
On The Tree
iTrader: (9)
Joined: Jun 2004
Posts: 143
Likes: 0
From: Upstate SC
Well, most of you guys are doing way better than me. Stone stock '03 1500HD CCSB 4x4, 6.0L/4L80E w/3.73's barely makes 11.5 around town and a all time best of 14.5mpg at 60mph on the highway. With a 24 gallon tank I'm normally looking for a gas station by 275 miles. 