If your late-model Chevy, GMC, or Cadillac cranks but refuses to fire, the problem might not be your battery, your fuel, or your starter. General Motors has traced a crank/no-start condition affecting dozens of 2021-2024 models back to a single culprit: an internal short inside the Fuel Pump Power Control Module.
GM detailed the condition in a July 2026 TechLink service article pointing technicians to Bulletin #24-NA-139. The good news for owners: the fix is a known part, and it may not cost you a dime. More on that below.
What Owners Are Experiencing
The headline symptom is an engine that cranks but will not start, paired with an illuminated Check Engine light. But this module controls the fuel pump’s power supply, and when it shorts internally, things can get strange.
According to GM, affected vehicles may also experience:
- Rough running before the no-start ever shows up
- The fuel pump continuing to run after the engine is shut off
- The engine refusing to shut off entirely
- Electrical accessories staying on after shutdown
- The starter continuing to crank even after the engine shuts off
That last group of symptoms is the kind of thing that sends owners hunting for phantom electrical gremlins. If your truck has been acting possessed after key-off, this module deserves a hard look.
Which Vehicles Are Affected
The list is long. This is not just a truck problem, but plenty of trucks and full-size SUVs are on it.
| Model Years | Vehicles |
|---|---|
| 2021-2022 | Buick Encore |
| 2021-2023 | Chevrolet Tahoe, Suburban, GMC Yukon, Buick Envision, Cadillac Escalade, Chevrolet Camaro (2.0L LTG engine) |
| 2021-2024 | Chevrolet Blazer, Equinox, Express, Malibu, Trax, GMC Acadia, Savana, Terrain, Cadillac XT4, XT5, XT6 |
| 2022-2023 | Chevrolet Traverse, Buick Enclave |
| 2022-2024 | Chevrolet Silverado 1500, GMC Sierra 1500 |
| 2023-2024 | Chevrolet Colorado, GMC Canyon, Buick Encore GX |
| 2024 | Chevrolet Trailblazer, Silverado 2500HD/3500HD, GMC Sierra 2500HD/3500HD |
In other words, everything from a Silverado 1500 to a Colorado to a three-row Tahoe or Suburban could be in play here.
The Trouble Codes to Know
The module in question is the K111 Fuel Pump Driver Control Module (FPDCM), which GM also calls the Fuel Pump Power Control Module. It typically lives on the frame, and on trucks it is mounted under the bed area (GM’s own service illustration shows a Silverado 1500).
When it shorts internally, the Engine Control Module (ECM) sets one or both of these primary codes:
- P023F: Fuel Pump Control Circuit
- P129F: Fuel Pump Power Control Module Fuel Pump Speed Signal Incorrect
Several supporting codes may also appear: P1029, P102A, and P102B (Fuel Pump Motor Phase U-V-W Circuits), U18A2 (Lost Communication with Fuel Pump Driver Control Module), and P0627 (Fuel Pump Enable Circuit).
The Fix
GM’s guidance to technicians is refreshingly direct. If the symptoms are verified, DTCs P129F and/or P023F are set, and diagnostics do not point to another cause, replace the K111 FPDCM. After replacement, the new module must be configured with the proper software setup, so this is not a driveway parts-swap situation.
If those two codes are not present, current or history, and the symptoms cannot be verified, technicians are told to follow the standard published diagnostics instead. GM also cautions dealers not to replace the FPDCM if it was already replaced in a previous repair.
The Part You Should Not Pay For
Here is the detail every affected owner should know: GM notes that Fuel Pump Power Control Module replacement is covered for 8 years or 80,000 miles under the vehicle’s Federal Emission Warranty. Even a 2021 model is still comfortably inside that window on age, so if a dealer diagnoses a shorted FPDCM, the repair should be covered for most owners well beyond the standard bumper-to-bumper warranty.
If your vehicle is on the list and you are chasing any of these symptoms, reference Bulletin #24-NA-139 at the service desk. It can save everyone time. For more service bulletin coverage, keep an eye on our TSB section.
Join the Discussion
Has your truck thrown a P023F or P129F, or kept running after you shut it off? Share your experience with thousands of fellow owners in the 2019-2026 Silverado 1500 & Sierra 1500 forum or the 2021-2026 Tahoe, Suburban, Yukon & Escalade forum on GM-Trucks.com.
Zane Merva is the Executive Editor of GM-Trucks.com and the President of the New England Motor Press Association (NEMPA). A veteran automotive journalist with over 26 years of experience, Zane is a designated ‘Car Talk’ Expert and has been a contributor to The Boston Globe. He possesses a unique evaluative perspective, having road-tested more than 2,000 vehicles across every major manufacturer. While he is a recognized authority on General Motors truck platforms—including the Silverado, Sierra, and Colorado—his expertise is grounded in decades of deep competitive analysis that few in the industry can match. His commentary has been featured by major OEMs and media outlets, including Hyundai and PR Newswire