Duramax

Information On Engine Oil Consumption Guidelines – 3.0L Duramax Diesel – 2020-2022 Cadillac Chevrolet GMC

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2022 Chevrolet Silverado 1500

NHTSA ID Number: 10205591 Manufacturer Communication Number: 21NA272   Summary This service bulletin provides information on Engine Oil Consumption Guidelines.     18 Affected Products Vehicles MAKE MODEL YEAR CADILLAC ESCALADE 2021-2022 CADILLAC ESCALADE ESV 2021-2022 CHEVROLET SILVERADO 1500 2020-2022 CHEVROLET SUBURBAN 2021-2022 CHEVROLET TAHOE 2021-2022 GMC SIERRA 1500 2020-2022 GMC YUKON 2021-2022 GMC YUKON XL 2021-2022 … Read more

Identifying Non-GM ECM Calibration Use and Power-up Hardware Detection in 2.8 Duramax Diesel Engines Using GDS 2 – 2016-2021 Chevrolet & GMC

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2021 Chevrolet Colorado

NHTSA ID Number: 10183128 Manufacturer Communication Number: 16NA325   Summary This technical bulletin provides a procedure on how to properly identify if there is any aftermarket calibrations loaded on the ECM or and detection of a power up hardware installed.   SEOCONTENT-START Service Bulletin Bulletin No.: 16-NA-325 Date: October, 2020 TECHNICAL Subject: Identifying Non-GM ECM Calibration Use … Read more

Information on Duramax Diesel 6.6L Common Engine Noises – 2017-2023 Chevrolet Silverado & GMC Sierra

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2021 Chevrolet Silverado 1500

NHTSA ID Number: 10222651 Manufacturer Communication Number: 16-NA-372 Summary This bulletin provides information on common diesel engine tick noises and how they are considered part of normal operation and no parts should be replaced for these normal operating conditions.   41 Affected Products Vehicles MAKE MODEL YEAR CHEVROLET SILVERADO 1500 2017-2019 CHEVROLET SILVERADO 2500 2019-2023 CHEVROLET SILVERADO … Read more

Identifying Non-GM ECM Calibration Use and Power-up Hardware Detection in Duramax Diesel Engines Using GDS 2 – 2019-2023 Cadillac Chevrolet GMC

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General Motors

NHTSA ID Number: 10222660 Manufacturer Communication Number: 20-NA-090 Summary This informational bulletin provides a way for the technician to identify if the ECM has been modified.   General Motors Position on Aftermarket Power-Up Devices General Motors does not support or endorse the use of devices or modifications that when installed, increase the engine horsepower and torque. This … Read more

6.6L Duramax Possible Oil Leak Path Information – 2017-2023 Chevrolet Silverado & GMC Sierra

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2020 Chevrolet Silverado

NHTSA ID Number: 10222657 Manufacturer Communication Number: 18-NA-150 Summary This informational bulletin provides information on 6.6L Duramax Possible Oil Leak Path Information.   This document is to help identify where to look for an oil leak on the 6.6 Duramax engine. Note: Please keep in mind that a leak on the top of the engine will trail … Read more