poor gas mileage

#1

I have a 2005 gmc crew cab z71. I have a 26 gallon tank and I am only
getting 290 miles off of a tank of gas is this right? I know other
guys who are getting 350 to 400 miles off of their tanks. I checked
air filter and most common things. I have 60k miles on the truck and I
drive with a light foot. Thanks

#2

<wmiller2502 (AT) yahoo (DOT) com> wrote

Quote:

I have a 2005 gmc crew cab z71. I have a 26 gallon tank and I am only
getting 290 miles off of a tank of gas is this right? I know other
guys who are getting 350 to 400 miles off of their tanks. I checked
air filter and most common things. I have 60k miles on the truck and I
drive with a light foot. Thanks

You don't say what your actual MPG is, nor what engine you have, but
assuming you run to a near empty tank, you're getting around 11 MPG, which
does sound low (heck even my Dodge gets better than that, but not by much).
What are your actual MPG numbers, and how heavy is your left foot?

#3

"Ed H." <edo.hart (AT) verizon (DOT) net> wrote

Quote:

wmiller2502 (AT) yahoo (DOT) com> wrote in message
news:201c3624-61a6-44b7-bda1-2c7938779541 (AT) a35g2000prf (DOT) googlegroups.com...
I have a 2005 gmc crew cab z71. I have a 26 gallon tank and I am only
getting 290 miles off of a tank of gas is this right? I know other
guys who are getting 350 to 400 miles off of their tanks. I checked
air filter and most common things. I have 60k miles on the truck and I
drive with a light foot. Thanks

You don't say what your actual MPG is, nor what engine you have, but
assuming you run to a near empty tank, you're getting around 11 MPG, which
does sound low (heck even my Dodge gets better than that, but not by
much). What are your actual MPG numbers, and how heavy is your left foot?

Er, that's "how heavy is your right foot?" I'm a little dyslexic.

#4

On Dec 12, 9:20 pm, "Ed H." <edo.h... (AT) verizon (DOT) net> wrote:

Quote:

"Ed H." <edo.h... (AT) verizon (DOT) net> wrote in message

news:Er18j.20856$OR.4651 (AT) trnddc01 (DOT) ..

wmiller2... (AT) yahoo (DOT) com> wrote in message
news:201c3624-61a6-44b7-bda1-2c7938779541 (AT) a35g2000prf (DOT) googlegroups.com...
I have a 2005 gmc crew cab z71. I have a 26 gallon tank and I am only
getting 290 miles off of a tank of gas is this right? I know other
guys who are getting 350 to 400 miles off of their tanks. I checked
air filter and most common things. I have 60k miles on the truck and I
drive with a light foot. Thanks

You don't say what your actual MPG is, nor what engine you have, but
assuming you run to a near empty tank, you're getting around 11 MPG, which
does sound low (heck even my Dodge gets better than that, but not by
much). What are your actual MPG numbers, and how heavy is your left foot?

Er, that's "how heavy is your right foot?" I'm a little dyslexic.

I have the 5.3 v8 and I am not much on driving fast. I drive pretty
normal. Also at 70 mph I am turning 2200 rpms, Is this right?

#5

I'd bet the 4wd gears are what is hurting you.
I had a 5.3l with 3.43 gears, and 70mph was 1750 to 1800 rpm.
2000 rpm was closer to 80.
I was getting closer to 20 to 21 mpg.

Quote:

I have a 2005 gmc crew cab z71. I have a 26 gallon tank and I am only
getting 290 miles off of a tank of gas is this right? I know other
guys who are getting 350 to 400 miles off of their tanks. I checked
air filter and most common things. I have 60k miles on the truck and I
drive with a light foot. Thanks

#6

On Dec 12, 8:56 pm, wmiller2... (AT) yahoo (DOT) com wrote:

Quote:

On Dec 12, 9:20 pm, "Ed H." <edo.h... (AT) verizon (DOT) net> wrote:

"Ed H." <edo.h... (AT) verizon (DOT) net> wrote in message

news:Er18j.20856$OR.4651 (AT) trnddc01 (DOT) ..

wmiller2... (AT) yahoo (DOT) com> wrote in message
news:201c3624-61a6-44b7-bda1-2c7938779541 (AT) a35g2000prf (DOT) googlegroups.com...
I have a 2005 gmc crew cab z71. I have a 26 gallon tank and I am only
getting 290 miles off of a tank of gas is this right? I know other
guys who are getting 350 to 400 miles off of their tanks. I checked
air filter and most common things. I have 60k miles on the truck and I
drive with a light foot. Thanks

You don't say what your actual MPG is, nor what engine you have, but
assuming you run to a near empty tank, you're getting around 11 MPG, which
does sound low (heck even my Dodge gets better than that, but not by
much). What are your actual MPG numbers, and how heavy is your left foot?

Er, that's "how heavy is your right foot?" I'm a little dyslexic.

I have the 5.3 v8 and I am not much on driving fast. I drive pretty
normal. Also at 70 mph I am turning 2200 rpms, Is this right?- Hide quoted text -

- Show quoted text -

I have a 99 Silvy 4wd with the 5.3l and I get better milage then that,
around 15 in town, BUT you have a crew cab and it wieghts more then
the ext cab, plus I don't think the 05 is areodynamic. Isn't this the
timeframe when they started changing the body style to the squared off
front end again? When is the last time you had a service performed?
That is going to hurt you some, dirty filter, etc..

#7

My Chevy is a diesel so I can't compare it to your GMC, but comparing it to
my Dodge, which runs just below 2000 RPM at 70 MPH, it may be that the
overdrive isn't engaging, which could account for the difference. Please
note however, the overdrive on my Dodge is pretty tall (IIRC .67:1 gear
ratio).

<wmiller2502 (AT) yahoo (DOT) com> wrote

Quote:

On Dec 12, 9:20 pm, "Ed H." <edo.h... (AT) verizon (DOT) net> wrote:
"Ed H." <edo.h... (AT) verizon (DOT) net> wrote in message

news:Er18j.20856$OR.4651 (AT) trnddc01 (DOT) ..

wmiller2... (AT) yahoo (DOT) com> wrote in message
news:201c3624-61a6-44b7-bda1-2c7938779541 (AT) a35g2000prf (DOT) googlegroups.com...
I have a 2005 gmc crew cab z71. I have a 26 gallon tank and I am only
getting 290 miles off of a tank of gas is this right? I know other
guys who are getting 350 to 400 miles off of their tanks. I checked
air filter and most common things. I have 60k miles on the truck and I
drive with a light foot. Thanks

You don't say what your actual MPG is, nor what engine you have, but
assuming you run to a near empty tank, you're getting around 11 MPG,
which
does sound low (heck even my Dodge gets better than that, but not by
much). What are your actual MPG numbers, and how heavy is your left
foot?

Er, that's "how heavy is your right foot?" I'm a little dyslexic.

I have the 5.3 v8 and I am not much on driving fast. I drive pretty
normal. Also at 70 mph I am turning 2200 rpms, Is this right?

#8

wmiller2502 (AT) yahoo (DOT) com wrote:

Quote:

I have a 2005 gmc crew cab z71. I have a 26 gallon tank and I am only
getting 290 miles off of a tank of gas is this right? I know other
guys who are getting 350 to 400 miles off of their tanks. I checked
air filter and most common things. I have 60k miles on the truck and I
drive with a light foot. Thanks

christ, a little info on motor would be nice

#9

Quote:

I have a 99 Silvy 4wd with the 5.3l and I get better milage then that,
around 15 in town, BUT you have a crew cab and it wieghts more then
the ext cab, plus I don't think the 05 is areodynamic. Isn't this the
timeframe when they started changing the body style to the squared off
front end again? When is the last time you had a service performed?
That is going to hurt you some, dirty filter, etc..

what hte heck do you mean "Service"....
You can service whatever you want and not gain 10mpg

#10

On Dec 13, 6:16 pm, Picasso <Pica... (AT) gmail (DOT) com> wrote:

Quote:

I have a 99 Silvy 4wd with the 5.3l and I get better milage then that,
around 15 in town, BUT you have a crew cab and it wieghts more then
the ext cab, plus I don't think the 05 is areodynamic. Isn't this the
timeframe when they started changing the body style to the squared off
front end again? When is the last time you had a service performed?
That is going to hurt you some, dirty filter, etc..

what hte heck do you mean "Service"....
You can service whatever you want and not gain 10mpg

Whatever, thanks for your input.