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  1. #1

    Default #13254- Rough engine operation on 2014 gm trucks.

    Hi, a newbie from Indianapolis area. Bought a 2014 GMC sierra all-terrain. This bulletin number is for those with rough engine operation. Remote start did some funny things on my truck. A p16a1 code came up from onstar. That is code for throttle sensor with high voltage. Took truck to dealer and they replaced the whole throttle body. So, for those who experience rough engine or reduced power,this could be the problem. Also, have noticed with new throttle body that the hard shifting is no longer a problem. Thanks for letting me come here. Great truck though. This seems to be for only 5.3l according to bulletin. Was wondering if anyone else has done this or experiencing same issues? Thanks

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  3. #2
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    Enkeiavalanche's Avatar
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    Nice info.....
    08 Z71 Avalanche Mods to date: K&N CAI,Hellwig Swaybars and End Links, Corsa Sport Exhaust, Superchips Programer,IPCW LOF & 3rd brake light and tails, AMI Gas door,Show Hooks and Door locks, Enkei Wheels, with Pirelli tires, StreetScene Bowties, Grant Steering wheel,Muth signal mirrors,SSBC Big Brake kit,Huskyliner Mug gards,Floor mats and Hood shield, McGard Lug nuts and locks, Bedrug, Cervini's Ram Air hood,35watt HID Fog lights, Sylvania bulbs all around ZXE's Highs and Lows, WhiteNight Back up lights,Sirius and HD Radio, SnugTop sitting on deck now Got a Softopper on now,Tempress Boat Hatches.... New Bilstein shocks are on... New Mods coming soon..... X

  4. #3

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    Welcome to the Club! And thanx for the info.

  5. #4

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    Welcome to the site. Good intro.

    Steve
    10 Chevy Traverse LT AWD
    02 Chevy Trailblazer LS (110K+ miles - loaded except for 4WD - WRECKED!)
    99 Chevy Cavalier LS (105K+ miles - commuter car)
    78 Chevy Suburban Silverado (454, 3/4 ton)
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  6. #5

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    Seems like they had this issue on the NNBS trucks as well in the earlier years. I actually just took mine in to get the TPS/Motor replaced. When mine started taking a deuce, my truck would actually stall out at lights from time to time and occasionally he would have a hiccup under acceleration from the motor losing signal and attempting to default to "closed" position. Was very annoying haha!

    Welcome to the club and thanks for the great write-up!

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  7. #6
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    Welcome to the Club!!!


    Mike (Denver, CO) - 2008 Sierra 1500 Z71 SLE 5.3L 4WD

    SUSPENSION: Rancho 4" Suspension Lift; Rancho RS9000XL Shocks; Rancho Skid Plates; Rancho MyRide Wireless Shock Controller;
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