The E01 Engine Control Module (ECM) for 2022-2026 CT4, CT5, Silverado, Sierra; 2023-2025 Envision; 2023-2026 Colorado, Canyon; and 2024-2025 XT4 models equipped with the 2.0L engine (RPO LSY) or 2.7L engine (RPO L3B) has been placed on a part restriction. The restriction will help gather product feedback before replacing the ECM. (Fig. 1)
Fig. 1
As part of diagnostic process, verify the vehicle condition is not related to a wiring/connection issue or calibration update. Review the following bulletins for more information:
- Bulletin #25-NA-197: Engine wiring harness chafing at the turbocharger heat shield or wastegate linkage – 2023-2025 Colorado, Canyon (Fig. 2)
Fig. 2
- Bulletin #25-NA-301: Engine wiring harness chafing at multiple locations in the engine compartment, including the engine cover, cylinder head bolts or A/C lines – 2022-2025 Silverado, Sierra (Fig. 3)
Fig. 3
- #PIP6023C: Poor connection at the X160 connector between the engine wiring harness and the fuel injector wiring harness. The X160 connector connects the engine wiring harness to the fuel injectors, the fuel rail pressure and temperature sensors, and the knock sensors – 2023-2025 Colorado, Silverado, Canyon, Sierra (Fig. 4)
Fig. 4
- Bulletin #24-NA-180: Knock sensor service calibration update – 2024 Colorado, Canyon
- Bulletin #25-NA-347: Engine wiring harness chafing between the ECM connector X2 and X201 at roughly 5 to 7 inches from the ECM. The contact and subsequent harness chafing point may be at the right-front suspension shock absorber mounting stud – 2023-2026 Colorado, Canyon (Fig. 5)
Fig. 5
If the source of the vehicle condition is not identified after reviewing these bulletins, be sure to have the Service Information document that has led to ECM replacement available and be prepared to review the diagnostic steps that led to ECM replacement before contacting the Technical Assistance Center. Also refer to Document 5207120 – Testing for Intermittent Conditions and Poor Connections in the appropriate Service Information.
For additional details, refer to #PIP6092A.
– Thanks to Robert Halas
