2021 GMC Yukon XL fuel system problems

Filed Nov 4, 2026 · Engine, Fuel system · MI

INCIDENT 4: Fuel Injector Internal Short (Cylinder #6) Component / System Failed: Fuel Injection System / Cylinder #6 Fuel Injector & Wiring Harness Failure Description: Cylinder 6 fuel injector failed due to an internal electrical short circuit, causing immediate engine misfires and severe power reduction. Repair required replacing the Bank 2 fuel rail, four fuel injectors, and the injector wiring harness. Safety Risk: Immediate engine shuddering and abrupt drop in drive power while operating in active traffic creates a serious loss-of-acceleration hazard and heightened risk of a rear-end collision. Dealer / Repair Shop Confirmation: Official diagnosis confirmed by Service Center Technician via electronic diagnostics verifying the internal electrical short circuit. Warning Symptoms: Check Engine Light illuminated simultaneously with engine shaking and sudden power loss; no prior symptoms existed before the failure. Inspection Availability: Confirmed via technician diagnostics; Check Engine light illuminated along with four other warning lights- car had to be towed to dealership to be fixed

Filed Nov 4, 2026 · Engine, Fuel system · MI

INCIDENT 3: Fuel Pump Driver Module (FPDM) Failure Component / System Failed: Fuel Pump Driver Module (FPDM - Part #13554821) / Engine Control Module (ECM) Communication Failure Description: Total loss of communication between the ECM and FPDM, causing the engine to abruptly die while idling at a traffic light. Subsequent attempt to restart using push-to-start produced a severe mechanical screeching noise. Safety Risk: Unexpected stall in active traffic left the vehicle stranded and unable to restart safely, exposing occupants to collision hazards. Dealer / Repair Shop Confirmation: Confirmed by Service Technician. Diagnostic Code P129F ("ECM lost communication with fuel pump driver module") logged; verified power and ground failures at the module. Replaced FPDM (Part #13554821). Warning Symptoms: None prior to failure. Sudden engine shutdown followed by screeching sound on attempted restart. Inspection Availability: Vehicle and replaced module are available for inspection upon request.

Filed Nov 4, 2026 · Electrical, Engine · MI

INCIDENT 2: Total Electrical / Power System Shutdown Component / System Failed: Electrical / Power Control System (Auto-Stop/Start System) Failure Description: Total loss of electrical power causing the main dashboard and display screen to go completely dark, stalling the vehicle during an autostop event at a traffic light and preventing the engine from restarting. Safety Risk: Sudden total electrical shutdown leaves the vehicle completely dead, unresponsive, and immobilized in active traffic lanes/intersections, creating a high risk of rear-end or multi-vehicle collisions. Dealer / Repair Shop Confirmation: Customer complaint and active fault codes confirmed by dealership service department following standard maintenance schedule. Warning Symptoms: Display screen went blank; failure occurred instantly during autostop/traffic light stop without prior warning. Inspection Availability: Vehicle and affected systems are available for inspection upon request. INCIDENT 3: Fuel Pump Driver Module (FPDM) Failure Component / System Failed: Fuel Pump Driver Module (FPDM - Part #13554821) / Engine Control Module (ECM) Communication Failure Description: Total loss of communication between the ECM and FPDM, causing the engine to abruptly die while idling at a traffic light. Subsequent attempt to restart using push-to-start produced a severe mechanical screeching noise. Safety Risk: Unexpected stall in active traffic leaves the vehicle stranded and unable to restart safely, exposing occupants to collision hazards. Dealer / Repair Shop Confirmation: Confirmed by Service Technician. Diagnostic Code P129F ("ECM lost communication with fuel pump driver module") logged; verified power and ground failures at the module. Replaced FPDM (Part #13554821). Warning Symptoms: None prior to failure. Sudden engine shutdown followed by screeching sound on attempted restart. Inspection Availability: Vehicle and replaced module are available for inspection upon request.

Filed Nov 4, 2026 · Engine, Fuel system · MI

INCIDENT 1: Internal Engine Failure & Excessive Oil Consumption Component / System Failed: Engine Internal Components (Piston Rings, Valve Guide Seals, Spark Plugs) Failure Description: Excessive oil consumption (1.5 to 2.0 quarts burned every 2,000 miles) leading to heavy oil-fouling on spark plugs #5 and #7. Required complete cylinder head, oil pan, and piston teardown to replace all pistons, rings, connecting rod bearings, lifters, guides, valve guide seals, and spark plugs. Safety Risk: Severe internal engine oil consumption and plug fouling create an immediate risk of engine misfires, unexpected loss of power, or catastrophic engine failure while driving at highway speeds. Dealer / Repair Shop Confirmation: Confirmed by Dealership Service Department via oil consumption tests, spark plug inspection with oil dye, compression tests, cylinder leak-down tests, and physical teardown. Warning Symptoms: Low oil warning lamp illuminated; continuous need to top off oil between routine maintenance services. Inspection Availability: Vehicle and replaced components are available for inspection upon request.

Filed Oct 27, 2026 · Electrical, Engine · TN

**Mileage at repair:** 76,165 miles **Component:** Fuel Pump Power Control Module While driving my 2021 GMC Yukon XL on [XXX] on a treacherous stretch decending [XXX] the engine unexpectedly stopped running, resulting in a complete loss of propulsion. This occurred on a section of interstate where there was no safe shoulder or suitable location to pull off the roadway. The unexpected failure created an extremely dangerous situation, exposing me and other motorists to the risk of a serious collision. The vehicle was subsequently towed, diagnosed and repaired by Darrell Waltrip Buick GMC in [XXX]. The dealership documented diagnostic trouble code P129F, "Fuel Pump Driver Control Module Fuel Pump Speed Signal Incorrect." The technician verified that the control module had proper electrical power, that there was no pin damage or connector fitment issue, and that the module required replacement. The dealership's written diagnosis specifically acknowledges that a failing fuel pump driver module can cause the engine to shut down. The original factory-installed module was replaced with GM part number 13554821, and the vehicle was subsequently tested and confirmed to operate correctly. The repair was performed at no charge, and GM provided a loaner vehicle while the replacement part was unavailable. I am particularly concerned that General Motors has previously acknowledged this same type of safety hazard under the federal safety agency Safety Recall 21V‑739 (GM N212332040), involving fuel pump power control modules on certain 2021 GM full-size SUVs. That recall identifies unexpected engine stalling and increased crash risk as consequences of module failure. My experience demonstrates the potentially catastrophic consequences of this failure in actual highway operation. I request that the federal safety agency investigate whether a mandatory recall and replacement of these defective components is necessary as the consequences of immediate complete unexpected loss of propulsion. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C.

Filed Sep 22, 2026 · Fuel system · NJ

part number 13554821 fuel pump control module has failed 2 times. April 2023 on Interstate 95 near Savannah GA in very busy traffic. Vehicle buckled and seized, just barely made it to the shoulder of the road. Same part failed again 9/18/26 while turning onto Sunrise Hwy in NY another very dangerous situation as we were stranded in the middle of a very busy intersection

Filed Sep 19, 2026 · Fuel system · MI

6.2L engine has the oil change update, and engine failed recently. took vehicle for repair to Golling GMC dealer. waiting on feedback.

Filed Sep 14, 2026 · Engine, Fuel system · TN

According to the GM Dealership the rod bearing failed disabling the engine. Dealer recommends replacing the entire engine. This consistent with recall N 252494000-N252494003 but my VIN is not included in the recall. Estimated repair $11,200. Our family was traveling roughly 55 mph on the interstate at the time of incident.

Filed Aug 23, 2026 · Acceleration, Engine · OH

Was driving the vehicle at 70 mph on the highway without any issues for several hours and suddenly the vehicle lost power and had no propulsion. It went into neutral automatically and the engine shut off while driving. Thankfully I was on a downward slope and could steer the vehicle off the very busy highway. Once safe, I tried to restart the car but the engine would not start or turn over. Roadside assistance came to help as well as a flatbed tow truck. It was taken to a nearby GMC dealer but it remains completely dead despite the battery being fully charged and all of the electronics working. No known error codes are showing up. It’s an L87 engine and was part of the GM recall. The recall work was completed in Nov 2025.

Filed Aug 17, 2026 · Engine, Fuel system · IL

I am filing a safety complaint regarding my 2021 GMC Yukon. While driving on the highway during a long-distance trip from [XXX] to [XXX], my vehicle suddenly experienced a serious loss of power, drivability issues, and loss of propulsion. The vehicle began shaking violently, slowing down unexpectedly, and struggling to maintain speed while in active highway traffic at highway speeds. At the time of the incident, the vehicle displayed a warning message indicating “Conditions Not Correct for Shift” at approximately 127,506 miles. Shortly after, the vehicle set diagnostic trouble code P0011, which relates to the engine and transmission system not performing as expected and indicates an issue with the Variable Valve Timing (VVT) system affecting engine timing and performance. The vehicle also entered a reduced performance state, and I was advised through the vehicle’s warning system to reduce speed, avoid hard acceleration, and avoid heavy load conditions. Despite following these precautions, the vehicle continued to run poorly and became increasingly unsafe to operate in highway traffic. This created a serious and potentially life-threatening situation, as I was traveling in fast-moving traffic and the vehicle lost normal propulsion and stability. I had to carefully maneuver out of active traffic lanes to avoid a potential collision. The vehicle eventually required roadside assistance/towing due to its inability to operate normally. Diagnostic trouble codes and warning messages were present at the time of failure. After the incident, I checked my VIN through the federal safety agency recall system and discovered that my vehicle has three unrepaired safety recalls. Of particular concern is: the federal safety agency Recall Number: 25V274 GM Manufacturer Recall Number: N252494000 This recall involves certain GM vehicles equipped with the 6.2L V8 L87 engine and describes a manufacturing defect in the connecting rod and/or crankshaft components that may result in engine damag INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA),