The contact owns a 2016 Chevrolet Colorado. While driving 30 mph, the vehicle stalled without warning. The contact was able to restart the vehicle. Additionally, when the vehicle was placed in park, the ignition key failed to cycle to the off position. The vehicle was taken to rydell Chevrolet (located at 1309, 18600 devonshire St, northridge, ca 91324, (866) 802-5628) to be diagnosed, but the mechanic was unable to retrieve a fault code or duplicate the failures. The vehicle was not repaired. The failures were intermittent. The manufacturer was notified of the failures. The approximate failure mileage was 44,000. The VIN was not available.

- Lebanon, MO, USA

When pulling into traffic circle from low speed, no throttle response. Engine died or had no input to propel vehicle. Change of gear selector had no affect. Not until pushed to side of road, completely shut off and remove key did engine restart or have any response to throttle input.

- Greenland, NH, USA

2016 Chevy Colorado with less then 10,000 miles. At low rpms on any incline truck will buck, sputter, and hesitate rather than automatically shift into lower gear. In city traffic, after slowing to make a turn then accelerating, truck will buck and sputter and drive train will make a hammer sound after engaging. I took it to dealer who said he could not duplicate problem, although this is a known problem.

- Florence, SC, USA

The vehicle was on a street stopped at a stoplight with the left turn signal on and in drive. The vehicle radio and electrical system powered off and reset without known cause and the vehicle engine and electrical system shut down. The vehicle was restarted by placing the vehicle in park and using the key to start normally.

- Oakdale, CT, USA

Coming off steep hill and transmission downshifted to low gear, the engine revved up and would not shift out. Tried giving and letting off gas, finally put it in neutral to let RPM's go down and put back in drive and it finally shifted on out. Took to dealership where I purchased and they test drove it and said the hill descent function was not working properly but there were no recalls or software update issue at this time that was covered under warranty. Issued complaint to Chevrolet and they said there were not enough complaints to address this issue at this time. Very frustrated.

- Ironton, MO, USA

During ownership of my 2016 Chevrolet Colorado V6 gasoline engine vehicle it has had numerous sputtering situations when accelerating. There is no rhyme or reason as to why the truck sputters to almost stalling. Dealership claims that the fuel injectors are probably dirty / fouled. Had injector maintenance performed and truck has no better engine performance and sputtering continues. This is dangerous on highway when accelerating in traffic. This has been occurring since original purchase date in October 2015.

- Upland, CA, USA

TL-contact owns a 2016 Chevy Colorado... contact stated that hood came open while driving going 5mph pulling out of parking lot.. vehicle shut off five times on five different days. Vehicle shuts off going from a complete stop after pressing on gas pedal. Vehicle shut off turning onto main highway and would not start back up. Hood latch does not stay shut. Vehicle was towed to dealership and hood latch was fixed. Vehicle was at dealership again a few days ago and dealership stated no recalls on vehicle. Dealership also stated vehicle was never in shop for shut off reason. Contact advised to contact Chevy at 800-222-1020

- Quincy, CA, USA

I took my Colorado in to dealership due to engine stalling, this is a very dangerous safety issue, I lose steering and braking ability when the engine stalls. The dealership said they are aware of the problem but they do not have an answer on how to fix this issue. The dealership informed me they have 4 other Colorado's doing the exact same thing. Also there are thousands of complaints on the internet of this exact same defect. I ask Chevrolet to buy back my Colorado due to it is not safe to drive.

- Clive, IA, USA

I have a 2016 Chevy Colorado 4 cylinder truck at the dealer again. Had it in about 8-10 months ago on the engine reviving real high when coming to a stop. They said it was probably the hill assist system and nothing they could do. Now it's chronic. It can rev to 2200 rpms as I come to a stop. I have to kick it in neutral to keep from hitting a kid in a crosswalk or the car in front of the. Both feet on the brakes. And, when I put it in neutral, it can rev up to 4000 RPM's. it's back at the dealer now and they don't have any service bulletins on it. I test drove a V-6 300 hp model while there and it did the same thing 2 times and the salesman didn't notice, but it never got over 1800 rpms. So, they haven't fixed it. But they're sincerely tried but I think it's the system not the dealer. The hill assist system doesn't pick up on if you're level or going down a hill anymore. Just revs up, and it's in 1st gear when coming to a stop.the torque is tremendous on the brakes. It's an accident waiting to happen. I don't think the dealer is negligent in anyway, I think it's the computer design on that hill assist has gone haywire on us.

- Evans, GA, USA

The contact owns a 2016 Chevrolet Colorado. While driving various speeds, the vehicle suddenly hesitated when attempting to accelerate. The vehicle was taken to the dealer (ferman Chevrolet of tarbon springs) on several occasions, but the failure could not be duplicated. The manufacturer was not notified of the failure. The failure mileage was 100. Updated 08/03/07

- Tarpon Springs, FL, USA

At approx. 3500 miles started experiencing shifting issues. When slowing down transmission wanted to stay in 5th or 6th gear. Attempts to accelerate caused the truck to bog down until it shifted to a lower gear to accelerate again. When in cruise control problem was really bad. Would loose as much as 5-8 mph before a lower gear was found to maintain speed in hilly conditions. I took vehicle in for its first service at approx. 6000 miles and had dealer check transmission. They remapped shift points to spec software. This was a temporary fix. Issue is slowly returning. I have watched on control panel at transmission oil temp ( truck has trailer towing package etc. This is a cluster feature available.) seems to shift properly until oil reaches 100 degrees plus then issue arrives. Dealer relayed there had only been a tech service bulletin has been to reset map/shift points. Recently pulled my boat with this truck and transmission shifted fine. Really would like this issue fixed because other then this problem really like the truck.

- Newburgh, IN, USA

On February 21, 2017 while making a right turn, my 2016 Chevrolet Colorado 4WD crew cab turned itself off. On February 22, 2017 richard lucas Chevrolet looked at the vehicle for 5 hours an drove the vehicle around several times and were "unable to duplicate concern." I was told to call back if the issue ever popped up again, but it was believed to be unlikely. March 28, 2017 while driving home from work, my Colorado ignition made a click noise, and the ignition key turned itself off yet again. This time around was much different than the first occurrence as I had no brakes to stop the vehicle. To stop the vehicle I had to shift into park which I was able to do. Vehicle will be returning to the richard lucas auto center to be reevaluated. On the first occurrence the vehicle was in motion on a county road while completing a turn and the second time it happened while going straight on a residential street.

- Woodbridge, NJ, USA

Vehicle stalls. When navigating a corner transmission looses its gear and acts like it doesn't know what to do and bangs and stalls. Also trans acts confused stop and go situations(city) and bangs when it remembers. Also does this when coasting on highway and accelerating again. It may jump down several gears and take off. Vehicle also has stalled several times at red lights and has a rough idle most of the time like it wants to stall. Been in shop numerous times for same thing and advised Chevy but they cant figure it out and it is still doing it. Also looked online for possible answers and there are a lot of these same problems reported with no answers.

- Selbyville, DE, USA

Since purchase of vehicle, it had a bucking at speed of 25-40 mph, this was very noticeable in city driving, this issue was couple with uncontrolled surges in the engine. The vehicle was purchase Oct 28 or 30, 2016. I turned in the vehicle for service on Dec 19, 2016, dealer service rep confirm there was an issue and keep the truck for repairs. Vehicle was in the service department for over 40 consecutive days to fix issue, dealership techs, as well as GM field reps have looked at the vehicle and have tried to fix it to no avail. On Feb 8, the GM rep said there is nothing wrong with the vehicle and the issue was a software problem with this specific type vehicle and that the software this vehicle has is a new software. When I asked if this issue is being worked by the software engineers for solution the rep said he has no idea and that I should take the vehicle back. This issue is a safety problem especially when suddenly surges without control, particularly while driving in a city center a driver can cause an accident or potentially hit a person while loosing control. GM costumer assistant was contacted, but there was not help and GM refuses to let me know when the fixes for this issue will be out. Therefore I have refuse to take possession of vehicle until if fixed correctly!! this issue will affect all 2016 and up Colorado with duramax engine and new software version installed on them.

- Harrington, DE, USA

The contact owns a 2016 Chevrolet Colorado. The contact stated that while driving approximately 70 mph, a loud popping noise came from the engine area before the speed suddenly decreased to 40 mph. During the failure, the steering assist, stabilitrak, four wheel drive and trailer braking system warning lights illuminated. The failure had occurred on multiple occasions. The vehicle was taken to the dealer but the failure was unable to be duplicated. The vehicle was not repaired. The manufacturer was notified. The failure mileage was 5,700. Updated 02/03/17

- Princeton, WV, USA

2,400 miles and this vehicle has been back to the dealer four times for "chugging and shuttering" in heavy traffic. Driving though an intersection with heavy traffic it will not keep up with traffic but tends to bog down almost getting rear ended from behind. If you try to smoothly accelerate it will rapidly downshift and jump forward almost rear ending any vehicle in front. Very unsafe to drive. Trying to drive with the flow of traffic at 35-40 mph the truck shutters as if the spark plugs are worn out. Also trying to accelerate into on coming traffic it will sometimes chug to where you wonder if it's going make make the merge. Very frustrating to drive for a brand new truck, the dealer replaced the torque converter at 500 miles, then has preformed service bulletin #pip5342B three times with absolutely no improvement. GM states in the bulletin "note: Preforming this calibration update may not totally address the shudder or chugging concerns" how can new vehicles continue to be sold with this known problem? not only is it frustrating trying to drive smoothly, but it is also a safety concern. Due to the poor performance the mileage is about 13 mpg in city traffic, not even close to the mileage rating of 17 mpg.

- Cape Coral, FL, USA

While driving the 2016 Colorado, the transmission/engine seems to have trouble shifting and accelerating and the shift patterns are erratic it seems, maybe its the fuel efficient crap that shuts down cylinders, maybe its the trans?. experienced it on highways and lower speeds, stop and go traffic, truck's transmission clunks, shifts hard at random and stutters allot. It's aggrivating. When trying to pass, seems to be zero acceleration felt when flooring it then suddenly kicks in (roughly)..like oh hey-I need to go.. I could get in a wreck-ended because of this and I better not try to pass anyone.. I feel my safety could be at risk with as much hesitation then suddenly lurches as it has. I see quite a few complaints already concerning this and/or describing just about the same ordeal. Daily - but random - city and highway, turning, straight etc. Basically any situation but idle.

- Dayton, OH, 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