2018 GMC Sierra 1500 Engine Problems

“No transmission power regardless of the gear shifter position. I turned the engine on and off several times trying to get a solution, no luck. I returned to the vehicle 5 minutes later and did get it to move,,,would only go 25 MPH at 3000 rpms. I was in the middle of wi not near any major dealership on-star was useless saying I had a major engine problem and the computer was trying to protect the engine. I was directed me to a chrysler dealer ship, who told they could not get me in for 2 weeks, suggested another branch which was over 45 miles away. …”

“I have had my Gmc SIERRA 1500 for almost 3 years. I have a little under 59,000 miles on the truck. A few thousand miles ago a tech at the GM dealer let me know that they had to add some coolant and it was something I should keep an eye on. I brought the vehicle back to have them look into it. They let me know that the radiator has a small leak. It is not big enough to have fluid hit the ground in my garage but it is loosing fluid. I looked online and saw that this is a common issue. I was told that it was not covered under warranty and it would cost a good amount to fix. …”

“Fuel injection seals #4 o-ring split - leaking fuel - pooling gas on manifold. Took vehicle in for smell of gas, lack of acceleration and poor gas mileage. This is known issue based on the service bulletin 18-na-137 - vehicle has less than 6000 miles”

“While driving with the roads in a wet condition, for various lengths of time, and in different maneuvers, the service engine light will start flashing and the vehicle will begin to lose power. After a few minutes, the service engine light will go solid and the traction control light will illuminate. The vehicle loses more power. On braking, just before the vehicle comes to a complete stop, there is a clunk in the transmission and the vehicle lurches. This has occurred 6 times in the last 14 months. Upon investigation, trouble code p0308 shows in the obd tool. …”

“After long periods of running and idle, vehicle stalls out has a hard time restarting. Gas paddle being press helps sometimes. Check code p2635 plus others (random secondary codes), come on. This has taken place in az where the ambient air temperature typically is over 100. Vehicle has been to GM dealer who says its vaporizing the fuel in the lines. Tsb pip5507b dose not include 2018, however the design hasn't changed. Conditions; long idle, hot weather, low speeds under 25 MPH or idle. Location; az sonrona dessert, off-road, jobsite, city streets.”