I had two episodes of sudden unintended acceleration while driving highway speeds on a highway. truck is weeks old- 1500miles only. brakes still worked so i was able to stop. rpms continued to escalate in neutral and park. had to turn off engine quickly to abort the problem. i'm taking the truck in for evaluation tomorrow. my wife and two oldest sons were in the vehicle. *tr
This vehicle (2016 silverado) has all the characteristics associated with the "chevy shake", an unresolvable driveline under seat vibration that is very severe at times. gm has issued service bulletin pi1354c which i followed at my expense to reduce / eliminate the severe shake that occurs at speeds of 69 ' 79 mph with no improvement. i believe it is a safety matter when a vehicle shakes to the extent of driver distraction and there are dangers associated with the long term effect on safety components that are subject severe shaking that they wouldn't otherwise be subjected to under normal durability testing. i do not feel "in control" while driving the vehicle when the severe shaking occurs at 69mph. i believe that since this is an ongoing build issue with thousands of documented complaints gm should be held accountable to determine the cause and provide relief to gm truck owners.
The 2016 silverado has a programming issue for the transmission. when i drive under a load going up a hill it chugs like i have a miss fire issue. the programming is set so it stays in the highest gear for to long when driving in city conditions. it stays in 6th gear going 25-30mph and when you need the throttle. the transmission can't decide which gear to be in. on two different occasions i went to pull out of a side road onto a main road and the truck fell flat on its face like i hit a kill switch and it all most caused me to get t-boned. i hit the throttle multiple times before it decided it was going to 100% throttle and have me going out sideways onto the main road. i have taken it to the dealer and they have confirmed it to be a programming issue, but there is no fix from gm and the dealer can't do anything with it because of epa laws, but there are aftermarket tuners that address this very issue and fixes the problem and also voids warranty of the truck. it's had the issue since the 2nd week i've owned it from new. the dealer told me to keep calling gm to complain, but all gm does is send me to the dealer. where i'm told there is nothing that can be done. it is an ongoing issue and is only a matter of time before it causes an accident or death if it hasn't all ready. i have 30 years of experience in the auto technician field and my family combined over 100 years. you know the issue is bad when a beginner driver notices the issue. if you have a local person. i'd be more than happy to take them for a ride to show them. for when this happened. it started in 2nd week of july to present. it only had around 300 miles when it started.
A condition exists where, after the driver has used the gas pedal to accelerate, then has removed their foot from the pedal, then presses the cruise "set" button a brief moment later, and then immediately attempts to decelerate by repeatedly pressing minus "-" on the cruise control, that the speed control becomes confused and displays multiple different speeds, while maintaining the original speed, even though the driver believes they are decelerating. this can be reproduced on any 2016 silverado model by following these steps: throttle up and accelerate (to pass, for example), remove foot from accelerator, then immediately press the "set" button, followed by 5-10 presses on the decelerate "-" button; the speed will set at 65, for example, then flip between 64, 65, 63, 65, 62, 65, 61, 65, 60, 65, and so on, maintaining speed at 65 even though the driver is instructing the vehicle to decelerate. it may take 5-10 seconds for the speed control to clear allowing the driver to make changes, however they will still be cruising at 65. during this period, the driver does not realize that they are not decelerating at which point they may tap the brakes to disengage cruise, but have lost 5-10 seconds of time. this has presented a dangerous condition where the driver believes they're decelerating when too quickly approaching another vehicle, risking collision.