2012 1500 Silverado 5.3L Gas Mileageafm mileage
Posted 11 April 2012 - 04:11 PM
Is there anyone out there that has seen this, and is there a fix? I could be way off, but it almost seems like a programming error in the AFM. I can't understand why the fuel mileage would be better in 4WD, and the AFM was switching into 4Cyl mode at a noticeably longer period of time. (I checked it on the same stretch of road i drive every day...)
Thanks for any help, this is a great site.
Posted 11 April 2012 - 05:03 PM
Posted 11 April 2012 - 05:18 PM
Posted 11 April 2012 - 07:23 PM
Posted 11 April 2012 - 08:39 PM
You need 5000+ miles before worrying about gas mileage. Also if your looking at the DIC for current mileage, you should watch it over a couple of tanks.
When my truck was new, it wasn't until I hit 10k miles before my mileage stopped going up.
Posted 11 April 2012 - 09:33 PM
I'm here all week ,try the Veal !!
Posted 13 April 2012 - 08:25 AM
Posted 16 April 2012 - 06:52 AM
- dd2bo likes this
Posted 16 April 2012 - 05:43 PM
2009 Dodge Challenger SRT8
2010 Jeep GC SRT8
69 Pontiac GP Model J 428
Posted 17 April 2012 - 08:43 AM
My FIL has a 2009 2WD Silverado with the 5.3 AFM, he gets right around 20MPG highway.
I wonder if on the Honda Civic forums they ask how they can get more payload in their Civics.
Posted 22 April 2012 - 10:58 AM
Posted 01 August 2012 - 07:53 AM
I have a 2012 Silverado 5.3L with 850 miles on it. I have gone through 3 tanks of gas and found that I am getting 11.7 MPG. I dropped it off at the dealership yesterday and the lead technician told me that the MPG that I was getting is "average" and it is in fact correct. He said that all of the trucks that come in are getting between 11.5-12.5 and that is what they are supposed to be getting. I basically told him that he was nuts since the window sticker states (as well as fueleconomy.gov) that City 15 MPG and Highway 21 MPG and everyone that I talk to with the same truck is getting 15.8 MPG. I also said that a friend of mine which has a 2010 (without the fuel saving 8cyl to 4cyl shifting thing) and he is getting better MPG than mine. The tech told me that he doesn't believe me....
What do you think about the 11.7 MPG?
Just FYI, I tried to return the truck the second day that I owned it because the transmission or engine is acting funny (shifting hard, downshifting even harder, etc..). I have also had some electrical issues; the remote starter didn't work but would recognize that I was pressing the start button but nothing happened (I have it on video), the door sensor was acting up showing that the driver door was ajar when it was closed (I also have these 2 separate instances on video). I called GM and told them everything as well and they stated that I would have to take it to the dealership.
Oh yeah, 8 days after I bought it GM started the "love it or return it" special!!
Posted 01 August 2012 - 09:53 AM
Posted 01 August 2012 - 10:12 AM
You need to finish a good break in of your engine before getting wound up about mileage. markw8 IS RIGHT ON about needing at least 5000 plus miles to loosen her up a bit.
Do you think that it will change by that much and go up to 15.xx MPG?
Posted 01 August 2012 - 10:27 AM
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