What 346 owners told NHTSA about the 2023 Chevrolet Silverado 1500 Ltd

Vehicle goes into reduced power mode and prevents safe acceleration in traffic and is a major safety concern. The Coolant Control Valve is the issue which has been a problem in the Silverado for a few years. This part is also on national backorder.

NHTSA ODI 11628842

At approximately 9k mi the engine performance (2.7L MAX Turbo) started to become intermittent. I always record the fuel milage, and always drive the same way, to/from work. NOTE: Displayed mpg calculates within 1% of actual. We can assume the driving habits are identical each time. While driving on the same tank of fuel for a week at a time: one day heading to work the indicated mpg might be 17 mpg. Driving home, about 10 minutes into the drive, it might increase 25 mpg. The following day it could be the same 17/25 mpg or it might be 25/17. The weather is somewhat dependent, whereas around =<43F the 17 mpg is almost a guarantee. While the indicated lower mpg is displayed, a direct lack of engine power is noticeable. The accelerator is dangerously non-responsive, all the while of pressing the pedal >3/4 to the floor. There is also no downshifting from the transmission whatsoever. To make the engine respond to change, the accelerator must be fully pressed to the floor, forcing the transmission into a lower gear and causing the engine to 'wake up'. When the mpg is above 20 or 21 mpg, (and temperatures >50F) the engine performs normally, where gradual accelerations to the pedal increase the engine speeds and down shift as expected. I have contacted GM through the 'MyCheverlot' app a couple of times, and have taken the truck to the dealer twice for this. Both times from the dealer it was stated that since the engine light was not on and no codes were stored, there was nothing that could be done. The dealer installed a software update and sent me on my way. Lastly, the 4WD is now making a grinding/rubbing noise, since the software update and overcomes the engine power while making turns from a stopped position. If no acceleration is applied, the truck will come to a rapid complete stop if rolling <10 mph. Truck is a LEMON!!

NHTSA ODI 11579816

We purchased a new 2023 Chevy Silverado in approximately January 2023. The onset of the problems with the new truck was Friday, August 4, 2023. The engine light came on, skipping occurred when accelerating - powertrain issues. While driving at various speeds, the vehicle hesitated and was jerking when shifting between the first and second gear. No warning lights were illuminated. Then after arriving home, the truck cut off and I attempted to re-start the car without success. Waited for some time to start the truck, but it would not start. Attempted to start again after several hours. Did not start until the next morning and was able to drive the vehicle to the Chevy dealership service department, The service department kept the vehicle from August 4, 2023, to August 10, 2023. We were not provided with another vehicle, while they worked on mine. The second time occurred 10 days after picking the vehicle up from the service department. Monday, August 21, 2023, to PRESENT. Same issues with the truck continued. This issue has caused a major inconvenience. Not only are we still making payments on the vehicle. We have not been given a date of when the vehicle issue will be resolved. The parts needed are on back order. The truck has been in the dealership service department for 22 days as of 09/05/23.

NHTSA ODI 11542689

DEF system has malfunctioned. It is not recognizing a full tank and proceeds to regulate how many miles you can go at a lower speed. The final speed drops to 5 mile an hour, not allowing you to go any faster. This is a brand new truck with less than 2,500 miles on it.

NHTSA ODI 11510069