2011 Sierra Questions

[Freakinoldguy]

Hi folks,

I've got a 2011 GMC Sierra with the 4.8 Litre engine with 838 KMs on it. So here we go.

I have what feels like a click on my gas pedal every now and then. It's randon and doesn't seem to effect performance or driveability. I've never had this before on any other truck i've owned and wondered if it was normal since alot of the trucks I owned were old school.

Second question, basically the same as the first only this time I get a slight click, clunk or whatever on the brake pedal after I've turned the steering gear to or nearly to the stops. So is this normal or should I be worried about the brakes? Once again it hasn't affected driveability or performance.

Last question. How long does it take for the truck to start getting close to the advertised gas mileage. I know that it has to learn how you drive and blah blah blah, but I'm starting to wonder if GM was prevaracating somewhat when they said city driving 15.9 L per 100 K?. The only extra weight I've got on the truck are running boards, 50 LB Xtang tonneau cover and spray in box liner.

Sorry to have been so long winded but I figured I may as well kill three birds with one stone.

Thanks in advance
F.O.G.

 

[Z15]

Every vehicle has certain idiosyncrasies and when you jump to a newer vehicle from an "old school" some things are going to be noticeable. What you hear may just be a normal characteristic. Can't say I have ever heard it but then again I don't pay attention to every little noise I hear. I had a friend once who complained he heard a strange noise every time he took off from a stop light, took it to GMC dealer and dealer discovered the semi-rigid floor mat he put in was the problem, his foot on it made a noise when pushed on the pedal.

New vehicles are "drive by wire" meaning the gas pedal is electronically connected to the engine, there is no linkage.

838 Km (500 miles) is no where near getting broken in. I would give is 5,000 miles before things you start to level out.

 

[Freakinoldguy]

Thanks.

I was really just wondering if anyone else had noticed these things and like I said, it doesn't seem to affect driving or safety. So I guess I'll let it ride for awhile and see if it clears up or maybe it's normal with the new technology.

Time will tell I guess.

 

[Wartsnuff]

my 2011 5.3l litre does it everytime you start

i can hear and feel to clicks they kick back the gas pedal ever so slightly

i am sure its a test of the fly by wire gas pedal.. press your ONSTAR button.. i am sure they will know!!

cheers & good luck

Warts