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Comments
The battery in the transmitter could be going out. 43k mi on a vehicle you should still be covered under warranty, unless you're the second owner.
Go old school, get a tire gauge and check it. Do the tires look low? Do you hear a leak?
IMO I'd have those sensors torn the hell out, and get nitrogen in at the next rotation.
As far as the transmission, have you flushed when recommended, or did you pass it up?
And you bought a 2011 hoping it would be better? That's what's called brand loyalty?
We're sorry to hear that you are having troubles with your Silverado. It looks as though you may already have started a Service Request with us, but if you haven't and if you wanted for us to get one going for you please contact us at socialmedia@gm.com with more information (including your name and contact information, a summary of the situation, the last 8 of your VIN and mileage, and the name of your dealership).
Sarah, GM Customer Service
-Place the display on Active Fuel Management (AFM) mode (display shows movement from 4 to 8 cylinders) and determine if the truck growls, lags and may even occasionally bang when switching from 4 to 8.
-Check for slop/slash in the rear end as you slow to turn a corner. Especially to the right for some reason! As you step on the gas, see if the truck lags, then "catches" and lurches.
-Ask the salesman if there are any internal GM service bulletins regarding the 6 speed transmission with AFM.
I you're going to do alot of driving like I do (in town and out of town) between 40 and 50 mph, make sure you test drive these trucks at that speed.
My 2011, like other 2010's and 2011's, is incredibly annoying to drive. Worst part, GM knows it.
DON'T LET THE SALES MANAGER TELL YOU IT HAS TO ADJUST TO YOUR DRIVING HABITS.
TEST DRIVE IT!
The torque converter spends as much time as possible "locked" when it's in gear. That's what you are feeling. The brakes work when applied.
I never would have guessed that brakes work when applied. And yes, I understand that the converter is programmed to lock up as much as possible. HOWEVER, the converter should NOT be locked at low speeds, like below 25MPH, and it should NEVER be locked when I am trying to stop and am at a slow speed. Even with the brakes applied, I can feel the transmission still trying to push the vehicle forward, and it fights the brakes. If the stupid thing would just uncouple and coast, problem solved. The tranny waits until the last possible second to downshift, forcing the RPM's up to keep the truck from stalling, and as the slush box finally drops to first, the ECM can leave the throttle alone. I have seen the tach drop to 300 or 400 RPM's when coasting to a stop, and due to the fly by wire throttle, the computer determines that it needs a bit of throttle to keep from stalling. This is what I am talking about. Solenoids are sticking in this transmission, or are very poorly designed.
Don't get distracted while driving, however, switch your driver display to "Instant Economy". Watch and feel it in the mid 40's! The annoying lag and growl will coincide with the 5.3 liter 6 speed awkardly trying to figure out "should I be in 6th at 45 mph, or 5th or maybe 4th. 4 cylinders? Maybe 8? Wait a minute, I'll just pick up the slop and BANG"!
The Feds upped the CAFE standards right after the $54 Billion "bailout" (TARP).
Hmmm? General Motors tweaked these things to squeeze out mileage. They appeased the Feds and still haven't paid back the "loan"(to tax payers).
GM kissed.... and politely went along with the CAFE increase (which the car manufuacturers rarely if ever do) and we got stuck with a very confused computer-controlled powertrain/drivetrain combo.
Be prepared. They're pushing for higher CAFE standards in 2017 (I believe in the 40 MPG range!). That means more hoaky tricks to appease. I've had many GMs. This may be it.
Hopefully nobody else gets stuck with one of these things like I and others have.
Thanks GM. You should be proud. You've made the Federal Government happy.
Yes, please unload it and move on.
Ensure it doesn't clunk lag growl and sometimes bang .
If it does, don't let any GM employee insult you by saying it has to adjust to your driving habits!
Really?! I'd call the dealerships GM and let him know what kind of people he's hiring...idiots.
There must be alot of "idiots" working as sales managers for GM! I'm exagerating. I really don't think so. They're just doing what the corporate people tell them to do. Contrary to the sales numbers, they're under a huge amount of pressure do to GM's financial situation.
However; many, many new 2010, 2011 and (apparently) 2012 GM Sierra and Silverado buyers have been told exactly that when they complain of the wierd/ackward transmission; "it has to adjust to your driving habits"!
Insulting to anyone with even a minimal mechanical background. I walked out when I was told that.
If they're using lines like that and there is an internal bulletin addressing the tranny/AFM issues, it's definitely widespread and they're keeping it under wraps. I know that from talking to techs and GM employees. My family worked in the industry.
After GM took the TARP money, they seem to have gone back to their old (1970s/1960s) approach to the customer; "just get the car sold, and use whatever line you have to to get them out of here if they have a problem."
However, with the number of SOLD units with the six speed transmission on the road-a software program reflash to fix or improve the power train is not going to happen IMHO, it's simply too costly.
And it doesn't matter how many negative posts people put on this board.
You can either live with it or buy a Toyota.
So far it HAS NOT AFFECTED RELIABILITY of the vehicle. They sell 40,000 units a month and I have yet to sell one sitting over on the shoulder of the highway.
Also, you can buy these trucks for $10,000.00 off sticker and save thousands over comparable trucks.
COST between $300-$500.00
The 2011's CLUNK LAG GROWL and sometimes BANG as the Active Fuel Management kicks into 8 cylinders.
Ask the salesman if you can constantly feel the AFM working.
Make alot of slow right turns.
Most of all test drive it at 45 MPH on level ground.
The vast majority of the 1300 plus posts are from 14 people.
On our way to 1500!!
Total YTD units are 463,688
Total SIlverado/GMC sales for October are 53,307.
This represents Chevrolet Silverado sales up 5.7% from a year ago, along with GMC truck sales up 9% in from the same period.
They are a great value right now!
It looks like they are test driving them. AND BUYING THEM!
Congrats on being a satisfied owner. Throwing sales stats out just makes you look like a GM troll. Knock it off. There are known issues with these trucks, and like several others on here, we are not satisfied with GM's engineering, or their lack of response to the problem. I am just going out on a limb to guess you have not bought 7 new GMC trucks since 2004. I have. The 2004 Sierra 1500 I had was great, as was the 2005 Sierra Denali, and 2006 Sierra 2500 Duramax. The 2007 Yukon, which was the first year of throttle-by-wire, had a lot of throttle lag. The 2008 Sierra 2500 6.0 gasser that replaced it was horrible to the point where I got $3000 in buyback assistance towards my 2011 Sierra 2500 Duramax. The engine and trans on this truck were great, but the very well known issues with the emissions system on these trucks forced me to trade it in. I was going through regens every 200 miles. I downgraded to my current 2011 Sierra 1500, which I wish I never would have got. It has every bad characteristic of my 2007 and 2008 vehicles, and then some. Sooo.....what happened to driveability since 2006? The only things that changed were the additions of AFM and throttle by wire. GM needs to fix these, or this will be my last, and I will be *UGH* going back to Ford or another make.
As for us GM owners, I've been in the after-market world for transmissions since 2006ish. I KNOW GM makes crappy transmissions. If I what I know now, to when I purchased my '02 in 10/02, I would straight up ordered a 5.3l LS with an 80e, but I didn't. The love affair that I have with GM is the ability to manipulate the long block for more power, and the 4.8, 5.3, and 6.0 basically having interchangeable parts.
My point to the people who are posting to this forum, is to contact GM Customer service directly. And they can see that GM has replied to ...
again, to those that are having transmission issues, go to the "my GM" website, register your vehicle, and you'll get a reply. I did it when I had the knock sensor and transmission issues, and they did what they said they'd do.
A - nothing lasts forever, and
B - Chevys / GMC are not that costly to repair. There are too many experienced techs out there that are capable of fixing/replacing a trans. You need to find a trans guy, I bet I can find one. I belong to a nation wide performance truck group.
All those short city hops with the tranny shifting up and down.
Same question for your friend's truck with 102K on it.
Hopefully other owners will chime in soon for you; if you decide to get this checked into at your dealership let us know as we're happy to work with you through that process.
Sarah, GM Customer Service
2012 Gmc Sierra Power Train Service Bulletin 347107
NHTSA: Action Number: 10045063 Service Bulletin Number: 347107
Report Date:
Jun 01, 2012Component:
Power Train
Summary: Gmc/chevrolet: some trucks, equipped with automatic transmission 4l60e, may experience slipping, missed or late shifts in 3rd and 4th gears due to possible 3-4 clutch distress. *pe
this describes my problem exactly...but unfortunately it doesn't say what is being done to fix it. Hopefully it won't require a new transmission.
I am an owner of a 2011 Silverado and am no way affiliated with GM.
Don't worry about it and enjoy your new truck!
Run far away and find a new dealer.