Vehicle stalls sometimes when I stop. SE light is now on. Service brake assist comes on now. Truck surges and shutters and is annoyingly hunting for gears and can't find them. Sluggish throttle like I'm trying to pull a bull dozer out of the mud. This mostly happens between 15 and 40 mph back roads and highway stop-N-go. Not settling for the "oh that's normal" bsht. Should have bought a Ford F150. Time for a trade in. 10K miles and I am completely disgusted with Chevy now. All I can say is good luck if you have a 2016 Colorado.

- Blairstown, NJ, USA

The transmission hesitates while trying to find the correct gear..I spoke to a maintenance rep at the dealership where I bought my truck and he said that the engineers made the truck that way for fuel efficiency. He also told me to just floor the accelerator to get power when I need it. It still hesitates even when I floor it and how does that help fuel efficiency? he said if a technical service bulletin comes out on this issue that I can bring in my truck and they will fix the issue. I am scared to pass a vehicle unless absolutely nothing is coming for fear of the time it takes for the truck to find the correct gear. It also kind of jerks when it does find the right gear. This has been going on since I purchased it in January of 2016.

- Bay St. Louis, MS, USA

On 6/6/16 I started having the trouble. After backing up and putting the truck in gear, the truck would surge forward without touching the gas pedal. This also occurred on 6/11/16, 6/17/16 and 6/23/16. On 6/23/16 I was at surdykes port 20 marina at the lake of the ozarks. After backing out of the parking space I put it in gear. This time it was much more than a surge. It literally shot forward and even the brakes didn't help because within 3-4 seconds my truck and I were in the lake. Finally got the window to break so I could escape. Just before I went in the lake the truck struck an old golf cart and jet ski trailer that were parked there and took them into the lake also.

- Crystal City, MO, USA

While driving the Colorado, the transmission gets so confused on what gear to be in and the shift patterns are the craziest I have ever experienced. From 40-20mph, stop and go traffic, this truck's transmission clunks, shifts hard, stutters and cannot figure out which gear to be in. It's very frustrating. Not to mention, when trying to pass, there is zero acceleration felt when flooring the peddle. I am so frustrated with this transmission and many days during the to and from work commute, I feel as if I am going to get rear-ended because of this transmission. It's annoying when driving but stressful as well, because I feel as if my safety is in jeopardy due to this "learning" transmission. It's so disappointing.

- Colorado Springs, CO, USA

--- "the transmission does not downshift from a high gear (5 or 6) to a lower gear when slowing down from 45 mph to 20 mph (or lower). When the accelerator is depressed to accelerate the engine bucks, vibrates, and does not accelerate. The engine RPM drops to 1,000 RPM or lower. If the accelerator is quickly floored the transmission downshifts several gears lower and jerks forward. This condition happens primarily on secondary roads while driving along the road and when pulling from one road into traffic on another road. The situation when pulling into traffic is dangerous because the truck does not accelerate as it should. This truck was purchased new and has 1,500 miles on it. This condition has been present since the truck was new and the severity varies with truck speed and road inclination. The situation has been reported to the dealer and to Chevrolet customer service. No corrective actions have yet to be made."

- Pittsfiled, MA, USA

When merging onto I-70 freeway from on-ramp, I applied throttle to move into the traffic flow. Engine "stumbled" as if in a dead spot. Truck did not accelerate and appeared to be lugging badly. Transmission was in too high a gear and seemed to be searching for correct gear. During this time oncoming traffic was forced to brake and there was a near miss of having a rear-end collision. All I could do was watch in the rear view mirror as traffic converged on me. This "dead throttle / wrong gear" issue has happened repeatedly on surface streets but luckily on surface streets I was not in such a critical situation. This is a problem that has been reported repeatedly and at many places on the internet. When will NHTSA force GM to address this issue? hopefully you will act before this results in serious injury or fatalities (if it already has not). Please act!

- Golden, CO, USA

Engine seems to lag under quick acceleration. Problem occurs most often when accelerating from a turn or when changing lanes under acceleration. Speeds of occurrence mostly approximately 20-25 mph. Requested checks and service at a dealership only to be given a service bulletin from GM stating this was a normal part of the traction management system. My previous vehicle (2014 Silverado) was also listed on the bulletin, but the problem was never noticed on this vehicle. I see this issue as an increased risk of a collision with the highest risk being a rear end collision. This needs to be addressed and fixed.

- Albuquerque, NM, USA

The transmission does not downshift from a high gear (5 or 6) to a lower gear when slowing down from 45 mph to 20 mph (or lower). When the accelerator is depressed to accelerate the engine bucks, vibrates, and does not accelerate. The engine RPM drops to 1,000 RPM or lower. If the accelerator is quickly floored the transmission downshifts several gears lower and jerks forward. This condition happens primarily on secondary roads while driving along the road and when pulling from one road into traffic on another road. The situation when pulling into traffic is dangerous because the truck does not accelerate as it should. This truck was purchased new and has 6,500 miles on it. This condition has been present since the truck was new and the severity varies with truck speed and road inclination. The situation has been reported to the dealer and to Chevrolet customer service. No corrective actions have yet to be made.

- Ashford, CT, USA

While driving the vehicle over 40+ mph and then reducing speed due to traffic to 20 mph, and then accelerating the engine again between 21-28 mph it seems to bog down the engine almost as if the transmission shifts into to low or high of a gear and makes the vehicle feel like it's bucking/jerking when trying to accelerate between 21-28 mph and then a burst of speed. Vehicle does it all the time between these speeds. Vehicle was bought brand new had it custom ordered and only had 9 miles on it so I know it's not a issue from someone else driving it vehicle currently has 1,200 miles is a V-6 crew cab

- Port Orange, FL, USA

Driving at about 60 miles a hour and lost all power engine was running but going no were all light were lite on dash like you turn key on before starting thank god no one was coming the other way or the car behind me would have hit me. He was a good driver. Shut it off and restarted it then it would run with all light on dash even brake light and anti skid light and it said on infro. Running at reduced speed. Drove to my home a slow speed it let me. Shut it down let it sit a few min. Restarted it still the same. Shut it down for about ten mim. Restarted it. Seem to run ok but check engine light is till on now I afraid the will just reset it and say it is ok. And next time I won't be so lucky. It has 5500 miles on it. I did see my life before my eyes hopping it dose not happen to others. Taking dealer tomorrow it happen at about 5pm 3/24/2016

- Harrisburg, PA, USA

Transmission does not downshift properly from upper gears (5,6) to lower range when decelerating from 40 + mph to under 20 mph. Vehicle will exhibit loss of power from being in too high of a gear range, causing "chugging", and then a sudden burst of power as you try to accelerate. Dealer reset ECM for transmission; problem persists. Typically occurs on residential or non-freeway streets, but has happened entering a freeway entrance ramp.

- Inver Grove Heights, MN, USA