2019 GMC Sierra 1500: won't start

Filed Sep 2, 2026 · Engine · AZ

I was coming to a stop at a stop a 3 way stop intersection. I parked completely and when I stopped the vehicle just shut down I did not have any warning signs come on prior as I looked at the dash it said place vehicle into park and start. I tried that but truck did not start. Call my friends we towed the truck on a trailer to my house and set up an appointment with gmc here in Tucson az

Filed Jul 13, 2026 · Engine, Fuel system · AL

The engine went into limp mode as I made turn leaving the damn I was is in town and it was a lot of traffic could’ve been bad if I didn’t pull into the median left me devastated and no crank no start I’ve only had the truck a year it went down a month from when I purchased it

Filed May 18, 2026 · Engine · AR

I was driving my 2019 GMC and all of a sudden I pulled into a subdivision the vehicle shut off and would not start again. I wasn't given an y warning or heard any sounds it shut off and would not start up again. I checked the battery and it was fine. I had it towed to a mechanic shop. They replaced the starter, and the battery module. after that they ran codes and the codes were P00C6 and P0340. I had it towed the the local chevrolet dealership and they told me I needed to have the engine replaced, however they don't have any engines available or know when they would be able to get one.

Filed Nov 14, 2025 · Engine · LA

The starter started dragging about a year ago and on November 12 the 2019 GMC truck would not start. We had it towed to Harper GMC in Minden, La. They told us the motor was locked up. This vehicle has a little over 40,000 miles on it. Has always been parked in a carport out of the weather and still looks brand new. I see where 2021 GMC trucks have a recall on the motor and this is the same problem with our 2019.

Filed Sep 5, 2025 · Electrical · TX

Vehicle (2019 GMC Sierra SLT X31!Crew Cab 6.2 l gas engine) stopped running while driving down the road (Wednesday [XXX]. Tried to start truck - would crank over quickly but failed to start ( crank no start with no check engine light.) tried several times same result. Started after about 5-10 minutes and was displaying low fuel indicator even though we knew it had approximately 1/2 tank. We immediately put gas in it and it took approximately 1/2 tank to fill. Still no check engine light and confirmed no stored codes via onstar report. Drove the truck around for may 1hr and check engine light came on but was still running and did not stop running like it did earlier. On star reported ECM SYSTEM CODE P129F ( Fuel pump or fuel pump power control module). Long story short, put truck in independent repair shop I use. They diagnosed it was a defective fuel pump located in fuel tank. They told me GM technical support recommended to replace the fuel pump and fuel pump power and control module at a cost of ~$1325.00. It is my opinion this is a safety hazard and very similar if not exactly the same failure symptoms / modes as others have already reported. I requested to keep the failed parts and still have them in my possession. Please review and let me know if you need or want additional information . Best Regards, [XXX] [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed May 16, 2025 · Engine · TN

I was driving down the road no lights on the dash, when suddenly the dash lit up saying shift to park to restart. Ended up having to hurry and shift to neutral in order for the vehicle to not cause an wreck and coasted into parking lot. I tried to restart my truck and engine would not start. Had it towed to a dealership and lifters had ate through the cam shaft. Luckily I had an extended warranty and only had to pay a deductible for a new engine. They put a new engine in and I already have a rattle coming from it with less then 10,000 miles on it.

Filed May 16, 2025 · Transmission · NC

I was headed out of town and stopped in the neighborhood at a stop sign. As usual, the Auto Stop/Auto Start feature turned the engine off and when I lifted my foot off the brake pedal to reengage the engine, the truck started rolling backward. The engine would not start even though all the gauges and systems were working as if the engine was on. I had the truck towed to my mechanic and after troubleshooting, they determined the engine was locked up and would need to be totally replaced. My truck has the 6.2L gas engine and have since learned that GMC is recalling later model trucks with this engine in them due to engine failure. If my engine failure had happened anywhere other than at a stop sign in a neighborhood, it could have caused a significant accident. I can't find a new engine because of the GMC recall and the cost to replace the engine with a lower mileage, used engine is approximately $16,500.

Filed Apr 19, 2025 · Electrical, Engine · ME

While turning into a buisness from a highway, the low fuel warning came on even though I had just filled the tank. Upon leaving the buisness, I started the truck and put it into reverse and the enging stalled. Restarted the truck and put it into reverse again and it stalled again. Restarted and tried going forward and it ran fine. About 1 mile down the road the low fuel warning came on again and the engine stalled while traveling approximately 35 MPH. At this point I realized that the doors had unlocked and the instrument cluster gauges kept sweeping up and down. I tried to restart the engine but it would not turn over. It acted like the battery was dead. After wating several seconds, I tried again and the engine restarted. I noted the battery voltage in the instrument cluster and it was normal. No warning lights on in the instrument cluster. No dtcs present when checked with a generic scan tool. My safety was put at risk because the engine stalled while driving in traffic. I have not taken it to the dealer yet as they are not open today and I wanted to report this while all the details were fresh on my mind.

Filed Mar 2, 2025 · Brakes, Engine · NC

I was traveling north on interstate 95 and approaching my exit ramp. I was initially in the inside lane of travel. I accelerated to merge into the outside lane, between two other vehicles, and then onto the exit ramp. Once on the exit ramp, I let off of the throttle and the engine suddenly shut down. I noticed a message on driver information center instructing me to shift the vehicle into neutral and press "start again". The engine had shut down without any warning whatsoever. I complied with the instructions to no avail. The truck is over half full of fuel. I was within an hour of home after completing an approximately 8 hour, 500 mile, round trip over 2 days of driving. After this event, I connected an OBD2 scanner and the only code found was P25A2 brake system control module. I placed the truck in park and tried repeatedly to start the engine. It would not turn over, crank or start. I had power to all systems and no other codes. I had to have the truck towed from the scene. The truck's performance had previously been flawless during this entire trip and had given me no warning whatsoever of the sudden engine shutdown. This is extremely dangerous and a safety concern.

Filed Oct 5, 2024 · Fuel system · GA

On [XXX] at approximately 2 pm the 2019 GMC Sierra 1500 AT4 (with 6.2 gas motor) motor died while I was driving in traffic. Incident #1 - The vehicle started sputtering and died - no alerts on dash until after the truck died - an empty fuel tank symbol briefly lit up on dash that led me to suspect a fuel pump issue as the fuel tank was full. Safety issue = vehicle failure with no warning in traffic putting occupants in risk. The vehicle would not start and was towed to the GMC dealer where I had purchased the vehicle. Incident #2, the 2019 GMC Sierra 1500 AT4 has an electronic gear shifter and will not go into neutral unless engine is running - problem as needed tow as not able to crank yet struggled to get towed as transmission will not go into neutral - apparently dealer has special tool to put 2019 GMC Sierra into neutral that is not available to consumer. Service department at dealer - Childre GMC in Milledgeville GA - contacted me on September 25, 2024 and stated 2019 GMC Sierra 1500 AT4 needs a Fuel Pump Control Module part number 13565641 but the part is not available in the GM system and may take weeks or months for part to arrive. Apparently, there are other GM trucks at this dealership waiting same part (appears to be a national issue not just a one time issue). Dealer gave me a GMC customer service number to call. I called GMC customer service on September 25, 2024 and registered a complaint that no parts are available to fix my car. Neither the selling dealer or GM customer service offered any relief with a loaner or rental car. Internet searches on forums focused on new GMC/Chevrolet trucks confirm that multiple consumers have this issue with the Fuel Pump Control Module and that GM cannot supply the repair part. The part is not available on the secondary supply chain like AutoZone, Oreilly, or similar. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jul 2, 2024 · Electrical, Engine · NY

2019 GMC Sierra 1500 SLT. Truck would not start on several occassions. By playing with brake, shift, and steering wheel truck would start again., Also would show warning notices, last one being {engine oil low-add oil}, even right after I just had the oil changed. This last time it would not start I paid to have my mechanic come to me to check it out. He tested a lot and thought it might be the starter so I then had to pay to have it flat-bedded to their garage. What he finally found was a BUNCH of wires worn through in a major wiring harness. It was caused by the wiring harness being next to the steering knuckle and the steering was wearing through the wires exposing bare wires. The mechanic and I see this as a major safety concern and a possible fire hazard. He has told me others have had similer problems . I believe this should definitly be a safety recall for these vehicles. My mechanic states that a new wiring harness olone is about $1500.00 plus a LOT of labor to install it. I do not believe that I should have to pay for a defect in GMC building this truck I have a picture of this mess of wires if you can help me with this. Don't know how to upload the photo I have but would gladly send it to you, Please respond back to this. Thank You Dennis Dorn

Filed Sep 6, 2022 · Electrical, Engine · FL

While driving down the highway at 70 MPH, the transmission slammed into gear and the engine died. A message appeared and said shift to neutral and press the ignition button. The check engine light also appeared. This had been a problem that first appeared at 48,000 miles. I was told that GM recognizes that there is an issue with the transmission, but that it would not damage the vehicle so it is not able to be repaired under warranty. The dealership advised that I should change the transmission fluid, so I did. The transmission continued to slam into gear thereafter. Fast forward to 55,000 miles where the truck completely died. The engine would not start and the truck had to be towed to a dealership. The next day the dealership told me that they had figured out the issue and that it was related to the fuse box and the ignition. I picked up my truck the next day, and drove less than a mile before the engine died again. I sat at the dealership for 12 hours and they had another answer for what was happening. They said that the shift lever was damaged and it was not allowing the battery to recharge. I live 400 miles away from where the truck broke down. I had to rent a vehicle to return home with my family from a trip. I now have to drive back to my truck in another state, and pay for the 12 plus hours of diagnostic work at $140 an hour as well as the cost of the part and the time to install it because the dealership stated that this is not covered by any warranty. I see that several people are dealing with a similar issue and I am frustrated that no one is willing to help us right this wrong. My grandfather worked for GM his entire adult life, and I will never own another one.