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2011 Silverado, POOR mileage, surging, no check engine light

77 messages,  Last post on Nov 01, 2012 at 5:57 PM

You are in the Chevrolet Silverado & GMC Sierra Forum.

What is this discussion about? Chevrolet Silverado 1500, GMC Sierra 1500, Chevrolet Silverado 2500, Fuel Efficiency (MPG), Truck

Messages Page 4 of 8

#28 of 77 Re: 2011 GMC Sierra ABS Brake Failure [spaztikhi] by shack4tom

Dec 27, 2011 (4:30 pm)

Replying to: spaztikhi (Dec 18, 2011 6:19 am)
Hi, I was considering a Silverado for my next purchase, what size motor and do you think the crew cab cuts the miles per gallon a lot?

#29 of 77 Re: 2011 GMC Sierra ABS Brake Failure [shack4tom] by chuck1919

Dec 27, 2011 (7:29 pm)

Replying to: shack4tom (Dec 27, 2011 4:30 pm)
I have the 5.3-2011 crew cab and get between 13 and 14 stop and go city. I have also achieved between 18 and 20 mpg highway depending on speed. It gets best mpg at no greater than 70mph.
 
Remember these things weigh 5,000 pounds and are shaped like a refrigerator, not the best for mpg.

#30 of 77 Re: 2011 GMC Sierra ABS Brake Failure [chuck1919] by string2

Dec 27, 2011 (9:27 pm)

Replying to: chuck1919 (Dec 27, 2011 7:29 pm)
I'd be satisfied with that! That sure is a lot better than 16 MPG at 70 MPH.

#31 of 77 Re: 2011 GMC Sierra ABS Brake Failure [string2] by chuck1919

Dec 28, 2011 (9:30 pm)

Replying to: string2 (Dec 27, 2011 9:27 pm)
String,
We are all aware that your truck is an exception and having issues. Thank you for once again reminding us of the terrible mpg you are getting with your truck. Your truck is an exception of not hitting the "high teens" on the highway.
 
Shack - these trucks are great values right now and there are deals to be had.
Good luck!

#32 of 77 Re: 2011 GMC Sierra ABS Brake Failure [chuck1919] by string2

Dec 28, 2011 (11:01 pm)

Replying to: chuck1919 (Dec 28, 2011 9:30 pm)
String,
We are all aware that your truck is an exception and having issues. Thank you for once again reminding us of the terrible mpg you are getting with your truck. Your truck is an exception of not hitting the "high teens" on the highway.
Chuck
====================================================
I'm glad to see that you and the other regulars here have been throughly saturated with my complaints about my poor gas mileage and "Active Fuel Management" problems that can't be corrected. I guess most people do feel like, problems are not really problems, as long as they are not their problems.
 
  But i'm really wanting to let the new readers know how GM takes care of their customers when there is a problem they can't identify.
According to GM, my gas & AFM troubles are not issues. They say it's operating normal if there is no trouble code (no matter what). You bought it! get use to it! sell it, if you can...leave us alone!
String

#33 of 77 Re: 2011 GMC Sierra ABS Brake Failure [string2] by shack4tom

Dec 29, 2011 (4:45 am)

Replying to: string2 (Dec 28, 2011 11:01 pm)
But i'm really wanting to let the new readers know how GM takes care of their customers when there is a problem they can't identify.-quote.
 
Ok, it is a help to be reminded. My cousin and his brother both big wheels in GM but gave me no help with my 04 Saturn issue neither can they help me find a job. They have no time for the little people. I still am going to buy American. They don't help me with any discounts either. I know of a certain person with a Yukon Suburban 374,000 miles and still running strong so that says a lot. I am seriously considering the Silverado with the 5.3 or 5.8 and I know that I will never return to the dealer except to trade it in after 20 years. I lke to read of all these issues and put it all together, I don't care for big advertisements but would rather sit in the complaint dept and take notes. Thanks for your venting and give me more.

#34 of 77 Big Picture by shack4tom

Dec 30, 2011 (3:46 am)

In your own opinion what would be in store for me, if to purchase a brand new Silverado 5.3L with reg cab? MPG, odometer reading when I drop off at the junkyard and how many years of service? I change oil (Mobil 1) every 3000 miles, good maint and I don't tow any thing, driving on good roads (not Michigan). Spaztikhi, Chuck1919, and String2, Servicetech and anybody else-all of your comments I value.

#35 of 77 Re: Big Picture [shack4tom] by string2

Dec 30, 2011 (7:58 am)

Replying to: shack4tom (Dec 30, 2011 3:46 am)
In your own opinion what would be in store for me, if to purchase a brand new Silverado 5.3L with reg cab? MPG, odometer reading when I drop off at the junkyard and how many years of service? I change oil (Mobil 1) every 3000 miles, good maint and I don't tow any thing, driving on good roads (not Michigan).
====================================================
Shack4tom,
     Sorry, I can't give you any first hand advice on the 5.3 engines, other than what I've read. My opinion (guess) is that you should get 250 - 300,000 miles out of it. If the one you buy has a properly operating " Active Fuel Management " system, you probably wil get good service out of the truck. If you won't be pulling anything with it though, you might want to check on one with the 3.08 rear end. It might get you a little better gas mileage. These trucks pull strong and seem to be built solid. I would be very satisified with mine if the Active Fuel Management system would work properly. Because of that, I only get about 16 MPH on the road, and they tell me it can't be fixed. Others posting on this site say they get close to 20 MPG. Good luck!
String

#36 of 77 Re: poor fuel mileage [string2] by fp2tall

Jan 05, 2012 (12:32 pm)

Replying to: string2 (Nov 28, 2011 5:56 pm)
The truck only has 3000 miles on it. I was told that if I wanted to bypass the AFM system to shift into manual mode and select the 5th gear and see the mileage that way. I tried this and found that 5th was too low and the RPM's stayed too high. I tried 6th in manual mode and the mileage was just as bad (13.4 hwy). I guess with the way it shifts so badly, terrible mileage and fluctuating idle, I need to paint it like a lemon and put sunkist stickers all over it. In the back window warn other potential buyers of the problems that GM will not correct.

#37 of 77 Re: poor fuel mileage [fp2tall] by chuck1

Jan 05, 2012 (2:12 pm)

Replying to: fp2tall (Jan 05, 2012 12:32 pm)
Here is another post that yet needs clarification. First off, 3,000 miles is way too early to start measuring mpg. When I got my truck the first 5,000 miles the city mpg was really bad, and then got better.
 
The truck DOES NOT REV much higher in 5th than 6th. I keep mine in 5th in city driving. NO reason to have the truck shift to V4 for a very short distance. In addition, the trucks transmission needs to "learn" your driving style.
 
The truck does not have the smoothest transmission on the market, but you have a 100,000 mile power train warranty should the transmission go out.
 
The Toyota has bed bounce, the Dodge Hemi sucks gas, and there has been a few blown turbos on the Ford Eco boost. Take your pick which one you should have bought.

Messages Page 4 of 8

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