2022

Engine Wire Harness Chafing / IPC Gauges Sweep / IPC Warning Message / SES/Check Engine/MIL / No Start / No Crank / Runs Rough / Stalls / Reduced Engine Power / Various DTCs – 2019-2021 Cadillac Chevrolet GMC

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2020 Chevrolet Silverado 1500

NHTSA ID Number: 10224856 Manufacturer Communication Number: 21-NA-149 Summary This technical bulletin provides repair information to correct a customer concern of Engine Wire Harness Chafing.   Condition 1 This Condition pertains to vehicles equipped with engine 2.7L, L3B only. Some customers may comment on any of the following concerns: – SES MIL – No Start – No … Read more

Front Brake Grind/Groan Noise After Sitting Overnight – 2020-2023 Buick Cadillac Chevrolet GMC

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2021 Chevrolet Trailblazer

NHTSA ID Number: 10219288 Manufacturer Communication Number: 21-NA-142 Summary This technical bulletin provides repair information to correct a customer concern of hearing front brake grind/groan noise after sitting overnight.   Condition A dealer may encounter a vehicle with a grind or growl noise coming from the brakes. This noise will normally occur after the vehicle has been … Read more

Charge Air Cooler Icing During Extreme Cold Weather Conditions – 2020-2022 Buick Encore GX & Chevrolet Trailblazer

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2021 Buick Encore GX

NHTSA ID Number: 10205054 Manufacturer Communication Number: 20NA028   Summary This service bulletin is to inform dealers that in extreme cold weather, a grille winter cover needs be added during PDI to avoid the customer returning with concerns related to charge air cooler icing.     5 Affected Products Vehicles MAKE MODEL YEAR BUICK ENCORE GX 2020-2022 … Read more

Information on Manual Regeneration Displayed on Drivers Information Center (DIC) – 2018-2023 Chevrolet Silverado & GMC Sierra

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2021 Chevrolet Silverado

NHTSA ID Number: 10222783 Manufacturer Communication Number: 20-NA-203 Summary This informational bulletin explains how the regen works for the DEF system and how it works at different levels.   Condition Some customers may comment that messages on the Drivers Information Center (DIC) are related to manual regeneration operation.   Cause This condition may be caused by a … Read more

Diagnostic Tip to Diagnose Emission Reduction Fluid Tank Electrical Connector Inspection, Reduced Power Message, Service Emissions System, System Displayed on the Drivers Information Center (DIC) Malfunction Indicator Lamp (MIL) Illuminated – DTC P02C1, P21DD, P221C, P10D9, P10F3, P143C, P20B9, and/or P221E – 2020-2022 Cadillac Chevrolet GMC

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NHTSA ID Number: 10224850 Manufacturer Communication Number: 21-NA-006 Summary This bulletin provides a possible location of a bad connection at the reductant fluid tanks electrical connector.   Condition Some customers may comment that the MIL is illuminated and a reduced power message with a Service Emissions System message as well. Some technicians may one or more of … Read more