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Unlock clean, code-free performance on your 2020-2023 L5P Duramax.
When you update components (DPF, DEF, EGR, NOx sensors) or install custom tuning on your 2020–2023 6.6L L5P Duramax, the factory CAN bus loses critical signals. This triggers annoying check engine lights, limp mode, and communication errors that can cripple your truck.
The Fish Tuning FTL5PCAN20-23 CAN Bus Harness solves this problem with precision-engineered plug-and-play connectors that terminate the open CAN bus circuits exactly where the factory modules and sensors used to live (primarily NOx sensor locations and the DEF module connector). Your ECM stays happy, communication remains intact, and you can run your custom tunes and performance modifications without constant codes or drivability issues.
Features:
- Direct fit for 2020-2023 GM/Chevy/GMC 6.6L L5P Duramax - specifically designed for these model years
- OEM-style connectors - secure, reliable fit with factory-style locking tabs
- Eliminates false ECM codes related to missing CAN bus signals after deletes or tuning
- Protects exposed terminals from moisture, dirt, and corrosion
- Durable construction built to handle the harsh environment of a high-performance diesel truck
- Simple plug-and-play installation - no cutting, splicing, or wire tapping required
- Maintains full CAN bus communication for tuners, gauges, monitors, and diagnostic tools
- Allows you to focus on performance instead of fighting codes
Fish Tuning is a trusted name in Duramax performance hardware. This harness is the clean, professional solution that keeps your L5P’s electronics communicating properly so your truck runs strong and stays out of limp mode.
Unlock clean, code-free performance on your 2020-2023 L5P Duramax.
When you update components (DPF, DEF, EGR, NOx sensors) or install custom tuning on your 2020–2023 6.6L L5P Duramax, the factory CAN bus loses critical signals. This triggers annoying check engine lights, limp mode, and communication errors that can cripple your truck.
The Fish Tuning FTL5PCAN20-23 CAN Bus Harness solves this problem with precision-engineered plug-and-play connectors that terminate the open CAN bus circuits exactly where the factory modules and sensors used to live (primarily NOx sensor locations and the DEF module connector). Your ECM stays happy, communication remains intact, and you can run your custom tunes and performance modifications without constant codes or drivability issues.
Features:
Direct fit for 2020-2023 GM/Chevy/GMC 6.6L L5P Duramax - specifically designed for these model years
OEM-style connectors - secure, reliable fit with factory-style locking tabs
Eliminates false ECM codes related to missing CAN bus signals after deletes or tuning
Protects exposed terminals from moisture, dirt, and corrosion
Durable construction built to handle the harsh env[...]
Unlock clean, code-free performance on your 2020-2023 L5P Duramax.
When you update components (DPF, DEF, EGR, NOx sensors) or install custom tuning on your 2020–2023 6.6L L5P Duramax, the factory CAN bus loses critical signals. This triggers annoying check engine lights, limp mode, and communication errors that can cripple your truck.
The Fish Tuning FTL5PCAN20-23 CAN Bus Harness solves this problem with precision-engineered plug-and-play connectors that terminate the open CAN bus circuits exactly where the factory modules and sensors used to live (primarily NOx sensor locations and the DEF module connector). Your ECM stays happy, communication remains intact, and you can run your custom tunes and performance modifications without constant codes or drivability issues.
Features:
- Direct fit for 2020-2023 GM/Chevy/GMC 6.6L L5P Duramax - specifically designed for these model years
- OEM-style connectors - secure, reliable fit with factory-style locking tabs
- Eliminates false ECM codes related to missing CAN bus signals after deletes or tuning
- Protects exposed terminals from moisture, dirt, and corrosion
- Durable construction built to handle the harsh environment of a high-performance diesel truck
- Simple plug-and-play installation - no cutting, splicing, or wire tapping required
- Maintains full CAN bus communication for tuners, gauges, monitors, and diagnostic tools
- Allows you to focus on performance instead of fighting codes
Fish Tuning is a trusted name in Duramax performance hardware. This harness is the clean, professional solution that keeps your L5P’s electronics communicating properly so your truck runs strong and stays out of limp mode.