Owners of a 2023 Chevy Silverado HD or GMC Sierra HD with an L5P 6.6L Duramax Turbo Diesel may have their trucks randomly stall and/or illuminate a check engine light. Here’s why and what they can do to fix it.
Duramax Stalling Issue – Vehicles Affected
- 2023 Chevrolet Silverado 2500 HD / 3500 HD
- 2023 GMC Sierra 2500 HD / 3500 HD
- Equipped with a (L5P) 6.6L Duramax Diesel Engine
- Produced from Start of Production Until August 1st, 2023
Duramax Stalling Issue – Conditions You May Notice
Some owners may comment on one or more of the following conditions:
• MIL illuminated
• Engine stalling
Some technicians may find one or more of the following DTCs set in the Engine Control
Some technicians may also find for a vehicle that stalled with P060C, additional codes:
Duramax Stalling Issue – The cause
This engine stalling and check engine light issue is caused by a software anomaly in the ECM and TSM.
Duramax Stalling Issue – Additional Information and Fix
This issue is detailed in Technical Service Bulletin (TSB) 23-NA-152. If you think you have this specific issue, please visit your dealer to have your truck serviced.
Your dealership will reprogram your ECM/TSM (Engine Control Module / Transmission Control Module) with new software to eliminate the stalling and check engine light. The tech will also perform a barometric pressure reset. This fix should be covered under warranty.