Weird Idling? Anyone else have this?

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by slimcubby, Oct 15, 2010.

  1. slimcubby

    slimcubby New Member

    Hey guys,

    I noticed today when I stop at stop lights sometimes the truck has a grumble and the rpm's change slightly. It almost feels like a the truck shakes when it happens? Is this normal?? I only have 1k miles on it. :(
  2. rgaff

    rgaff New Member

    No Not Normal, This is too broad of question There are many,many reasons for your problem
    Much more information needed. New vehicle ? Rebuilt engine? I think if you provide as much you can, someone here will help you out
  3. Metaluzc

    Metaluzc New Member

    Try cleaning the MAF sensor and throttle body with some CRC Cleaner before you do anything expensive. My truck had 80K miles when it happened to me but my truck would idle rough and actually shut off as I was slowing down to make a turn or come to a stop sign, I cleaned both the MAF sensor and throttle body and the problem was fixed.
  4. phoebeisis

    phoebeisis New Member

    Do you have one of the motors with cylinder shutdown?
    I wonder if it goes from 8 cyl to 4 cyl at stops.
  5. Z-71

    Z-71 New Member

    My 03 does this too...I'm guessing your truck is new.As far as I can tell it is normal.Some people might not notice it but I am picky.
  6. kwconch021

    kwconch021 New Member

    my 06 did this when i had it ghetto rigged...
    i drilled a 3 inch hole into the stock muffler mainly for sound bc thats about all it would do...

    had this **** happen, scared the piss outta me, got flowmasters a few weeks later and she breathes correctly. check exhaust, intake etc... good luck
  7. BiG Chris

    BiG Chris New Member

    my 00 silverado does it as well
  8. 2010_Sierra

    2010_Sierra New Member

    I have noticed the same kind of occurrence on my new 2010 Sierra with 6.2L. I just rolled 3,000 miles on it. I also noticed this kind of thing on my previous truck, a 2002 Silverado with 5.3L. From the day I got it with 5,600 miles to the day I traded her in with 130,000 miles, it would do this off and on. Never had any mechanical issues from it. I routinely replaced the fuel filter and air filter.
  9. ntbush83

    ntbush83 New Member

    X2! I had the exact same problem. Took it into the shop because it was bothering me and they cleaned the MAF and throttle body and it ran like new. Give it a try!
  10. thoffman2000

    thoffman2000 New Member

    Same here...2010 Sierra Crew Cab with 6.2L, approx 5500 miles. Feels like a rough idle, but not enough in my case to make the tach needle move.
  11. M Schlabach

    M Schlabach New Member

    Here ya go...I purchased a new 2010 Chevy Silverado Crew Cab 5.3L in March.

    I love the truck, but it has been a nightmare ever since! 1st night I drove it home from the dealership, it started smoking very very badly. The next morning it went back to the dealership on a rolloff where they had to replace all 16 lifters (was without a truck for a week).

    The collapsable lifters these have in them for the Active Fuel Management I think is the problem. Next I noticed my steering tires were cupping badly, dealer said camber, caster, & towend were all out from the factory, which took 2 new tires and an alignment. Brakes started squealing bad, so dealer turned rotors which cured problem for a month-&-half....back to squealing again.

    I noticed that the truck started idling rough, almost "hiccupping" when I was sitting still. Check engine light came on and showed a random misfire code. Dealer said my #7 spark plug was fouled out (covered in oil), so they replaced it and said GM wanted me to drive it and see if it happened again, because they were not sure what the problem was. Well, it happened again, the check engine light came on and Onstar diagnostics said same thing, (random misfire code).

    I called dealership immediately....before I could get it scheduled in it blew the #4 spark plug clean out of the block, which left me stranded 2-1/2 hours until roadside assistance could come get me & the truck. I have had a few small petty things go wrong, but is to be expected with any new vehicle.

    I truly think I have lemon on my hands, but I have 16,800 miles on the truck, and Ohio lemon law covers a vehicle up to 1 year or 18,000 miles, so I am very close to losing out on that law. I am going to contact some lemon law attorneys, but I am sure this will be drug out. Sorry to sound like a whining dog but I spent hard earned money to purchase this truck, I do not want this to nickel & dime me to death after warranties have run out.

    Anyone have any other suggestions?
    Mark Schlabach
    1 person likes this.
  12. Metaluzc

    Metaluzc New Member

    You should win a lemon law IMO. I bought a 2003 Silverado 2500HD with about 65K miles two and half years ago, I'm now just over 81K and haven't had half the problems you have. A 2010 truck shouldn't be experiencing all of those problems, you need to get your money back.
  13. daweinah

    daweinah New Member

    I have similar rough idle on my '08. Not quite 30k miles on it yet. Doesn't seem to affect performance, but I notice it at stoplights.
  14. Eric K

    Eric K New Member

    One thing I noticed on my '08 4.8L truck that has been happening since new, is when sitting at a stoplight, It'll feel like someone bumped into me from behind. The first time it happened I looked in my mirror and there wasn't anyone there. Weird?!
  15. doddelectric

    doddelectric New Member

    03 will not idle

    the 03 does not have a idle up solenoid so it depends on the space around the butterfly for air when it is idling if it is dirty you will have these problems clean with rag an carb cleaner
  16. daweinah

    daweinah New Member

    Hey guys, I have an update for this thread. I got this letter from Chevrolet a few days ago and it seems to address this issue exactly. I scanned it in so you guys can see what I see. I've yet to take my truck in for the repair though.

    1 person likes this.
  17. 00chevy53

    00chevy53 New Member

    i have a rough idle on my truck too. the motor thats in it is from a 2006 truck and i have engine codes that are telling me both banks are running lean and i have a multiple missfire. this didnt start until i changed my plug wires and went from an 8mm wire to a 7mm wire. so what daweinah posted im going to have to agree with.
  18. GMTruckManiac

    GMTruckManiac New Member

    I seem to have a hesitation/misfire problem on my 95 gmc 1/2 ton truck. it does it the most when in park not much when accelerating but i just tried dripping sea foam into the throttle body and dumped the other half of the can in my fuel tank. any other ideas?..
  19. babinke

    babinke New Member

    My 2008 Silverado idles weird at stop lights too.. I went to the chevy dealer and asked them about that no charge fix and they never heard anything about it.. Maybe GM Canada doesnt cover it.. I emailed GM to see if they could help me out. Ill try cleaning the MAF sensor to see if that helps.
  20. Unfortunately I primarily specialize in working with customers in the US. However, I would recommend contacting GM of Canada at 800-263-3777. The hours of operation are M-F 7:30am - 11:30pm, Sat 7:30am - 6:00 EST. I hope this helps. Thank you.

    Tricia, GM Customer Service.

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