CP4 high pressure fuel pump failed causing Loss of Motive Power (LOMP) in Oct of 2018. Truck became hard to steer and brake but I was traveling at a lower speed. Had it of been 1 hour later I would have been at freeway speeds pulling a 13000lbs trailer. I had the truck towed to a local dealer where they diagnosed the truck as having a failed CP4 high pressure fuel pump made by Bosch. They informed me that the entire fuel system would have to be replaced do to the large amount of metal contaminants that this catastrophic failure produces and spreads though out the entire system. The total cost for the repairs were not covered under any type of warranty or recall and had to be paid entirely out of pocket. Not only was this a huge inconvenience as I was trying to leave town for a vacation it was very very expensive. I still can not understand why there has never been a recall on this issue. I think it can be related to a safety issue as a LOMP. I believe GM knew that the CP4 pump was and could be a faulty product but continued to use it.

- Ogden , UT, USA

The contact owns a 2011 Chevrolet Silverado. The contact stated that while driving at an undisclosed speed, she heard a loud abnormal tapping sound at the hood of the vehicle. The contact then stated that upon inspection, she noticed that the tapping sound was coming from the lifter and lifter arm when the piston dropped down. The traction control warning light was illuminated. The vehicle was taken to an independent mechanic where it was diagnosed that the pistons, rocker arm, head valve seals, and lifter arm needed to be replaced. The vehicle was repaired however, the failure recurred. The contact then stated that upon research she was informed that the engine may need to be replaced. The vehicle was not repaired. The dealer was not notified of the failure. The manufacturer was not notified of the failure. The failure mileage was approximately 260,000.

- Lobelville, TN, USA

Diesel exhaust filter (def) and flow reduction tube on duramax lml engine. Fautly def requires extremely high temperatures to clean - or regenerate - causing the def and reduction tube to fail. High temperatures are a fire hazard to vehicle and grass or other terrain over which the truck is parked. GM no longer manufactures the reduction tube, GM part number 25960609 forcing the consumer to wait for GM to make part on special order basis - over 30 days - or force consumer to remove def or make other fabrication, order to operate the vehicle. GM is aware via customer service and dealer complaints that the lack of part 25960609 availability is a nation-wide problem and has a high failure rate. GM stopped production as a cost saving measure. The duramax lml engine is in service mostly as commercial vehicle fleet. Thus, there is a high probability of unsafe fabrication in order to restore vehicle operation.

- Fredericksburg, VA, USA

My dash is cracking around the passenger airbag and above the instrument cluster. I am concerned that the cracked areas could come loose and become a projectile. The engine is also burning oil badly and could shut down while driving

- Wamego, KS, USA

The contact owns a 2011 Chevrolet Silverado. While driving approximately 15 mph, the contact depressed the brake pedal, but the vehicle continued to accelerate. The contact stated that the throttle was also sticking and the engine indicator was illuminating. The vehicle stalled and would not restart for ten minutes. This was a recurring failure. The contact had to push the onstar button, which provided the codes of the failure. The failure codes stated that the pps throttle system was failing. The dealer stated that they could not locate a failure. The manufacturer was notified. The approximate failure mileage was 83,918. The VIN was unknown.

- King George, MD, USA

First of three vehicle collisions this year involving Chevrolet Silverado that have caught fire after involved in frontal impacts. Vehicle traveling westbound on sr 58 in lane county, Oregon. Involved in secondary collision with a Toyota pickup truck that had been struck by a loose truck tractor wheel. The impact by the wheel caused the Toyota to encroach into the path of the Chevrolet. The occupants of Chevrolet were able to extricate themselves. The vehicle subsequently caught fire and suffered extensive fire damage.

- Springfield, OR, USA

We were making a stop at the light, when a 18-wheeler didn't stop and hit us in the back, pushing us towards the bus that was in front of us, making the glass of the back break and throwing all the crystals in our body and clothes, the air bags never open, the front seats were broken and 3 of the 4 doors couldn't close anymore, the driver tried to make a move to the left or right, but he could not, because we were stuck, when we realize there were no major injury, we stayed until the red cross came to check our condition, but there were crystals everywhere so we couldn't move without hurting ourselves. We buy the truck with 2 miles, we are the only owners.

- Baytown, TX, USA

Exhaust fluid quality poor appeared on the dash display, so I toped it off with more fresh def and the warning went away.3 days later the same warning came back on the dash display only with a new warning with it that said vehicle speed will be limited to 55mph next fuel fill, it did! I took the truck to the dealer they found bad nox sensors 1&2.repairs where not done because I felt that should be some sort of recall on defective parts that controls the drivability of a vehicle. On Feb-4-2015 I received a letter from GM after 2 years telling me that my truck may have nox sensors that can become contaminated and that GM is extending the warranty on the nox sensors and the wire connectors for 10/yrs. 120.000 miles which ever comes first. So I go back to the dealer and show them the letter from GM and show them my receipt from when I came in 2 years ago that shows that the nox sensors were defective way back in 2013 and are still on the vehicle and I need the repairs done per the letter from GM. The dealer is refusing to repair the vehicle because of the mileage that is now on the vehicle, however the defective parts that failed when the vehicle was within the mileage are still on the vehicle and I feel should be replaced and repaired or reimbursement for $800 programmer. I have contacted Chevrolet and they are working with that dealership to try and resolve this issue. Case number is available if needed, GM letter number is 13386.

- Beaumont, TX, USA

November 19 2014 I was driving to work when my service exhaust fluid system dic came on, followed with the check engine light. It was taken to our local dealership and they replaced all components of the def system. Then on December 11 the exhaust fluid system dic came on again, but with the message that the fluid quality is poor. Once again it was taken to the dealer ship where they drained the tank and refilled it. Then again on December 16 2014 the exhaust fluid dic came on again with fluid quality is poor. Will once again return to the dealership.

- Bloomfield , NM, USA

At 36000 miles the engine burns oil. So far as of 46000 miles pistons burned have been replaced pvc filter and valve were replaced along with valve cover. At present 54000 miles engine still burns oil.

- Denton, TX, USA

Check engine light is displayed and the motor is hesitating. This issue is a second occurrence due to the valve cover leaking and causing the spark plugs to go bad. First time the vehicle was under warranty at approximately 29000 miles and now the vehicle has 39000 miles and the issue has recurred. This appears to be a continually recurring problem for 2011 Chevrolet Silverado trucks.

- Springfield, VA, USA