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  1. #1

    Default Rough Idle 2013 2500 Suburban

    I have a 2013 Suburban, 2500, 6.0 liter engine, with 6,000 miles. I purchased it new in July of 2013. Since the vehicle turned 3000 miles, I've noticed that once the vehicle reaches operating temperature, there is a rough idle when stopped at a light in drive. I can see that there is a slight fluctuation in the tachometer reading which hoovers around 500 RPM. I can actually feel a vibration while stopped with my foot on the brake. I have brought the vehicle backed to the dealer twice for routine oil & oil filter changes ( 3000 & 6000 miles) and complained of the rough idle. Each time I was told that the technician had checked and found no codes and that since the check engine light was not coming on, there was nothing that could be done. One Service Advisor referenced a service bulletin that described a rough idle as normal. I purchase gasoline from branded stations, not the cheaper locations. I find it disturbing that this condition could be considered "normal". Has anyone else had this problem ? Any suggestions would be appreciated.

  2. #2


    Hello hanks2013,

    I am sorry to hear that you are experiencing an issue with your vehicle after visiting your local dealership. I cannot guarantee anything but I would be happy to look into this concern for you. Please private message me referencing this thread if I can be of any assistance.

    Jennifer T.
    GM Customer Care

  3. #3


    Thank you for your response. My e-mail is I look forward to hearing from you.

  4. #4


    Just curious, what brand and octane fuel are you running in it?

    1995 Silverado 4x4
    6" BDS Suspension Lift-3" Body Lift-Add A Leaf in rear -Trailmaster SSV Shocks-Duel Steering Stabilizer Kit -AirAid Cold air intake-
    4.56 Gears with Detroit Auburn Locker-Pro-Comp Traction Bars with duel shocks-Aluminum Skid Plate Kit-38.5" x 16.5" Mickey Thompson Baja Claws-Constant Dropping fuel gauge

    2005 Yukon XL Jet Power Programmer, Bilstein Shocks, Bilstein rear springs, Helwig Anti-sway bars, EGR Window Visors, EGR Hood Shield, Denali Headlights, Headlight harness upgrade, GE NightHawk Bulbs, White Night Rear lighting system, Russell Braided SS brake lines, PowerStop Brake pads, PowerStop cross drilled and Slotted Rotors,
    2002 Silverado ext cab 2wd (Sold)
    2003 Yukon XL (Totaled)

  5. #5

    Default 2013 Suburban Rough Idle

    Quote Originally Posted by Pikey View Post
    Just curious, what brand and octane fuel are you running in it?
    I use either Mobil or Exxon regular grade gasoline, 87 octane.

  6. #6


    I wonder if running a higher octane for a few tanks would smooth it out.

  7. #7


    I appreciate the suggestion but don't understand how a motor with only 6,000 miles on it, needs an octane boost.

  8. #8


    Quote Originally Posted by hanks2013 View Post
    I appreciate the suggestion but don't understand how a motor with only 6,000 miles on it, needs an octane boost.
    Oh, I agree with you. a rough idle with that many miles seems odd. But, if GM is saying it is normal, then short of showing up at the dealer everyday and complaining about it I don't know what options you have. That is why I wondered out loud about the higher octane fuel. heck, if you get fuel at the same station every time I would even try somewhere else for a few tanks. Maybe it is a fuel quality issue, dirty tanks at the station, or water in the tank at the station.

  9. #9


    Your points are well taken. Although I use the same brands of fuel, I patronize several stations, therefore I don't think it is a fuel contamination issue at a particular station.

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