Silverado

A/C Inoperative and/or Insufficient Cooling – 2017-2018 Cadillac Chevrolet & GMC

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2018 Chevrolet Silverado

NHTSA ID Number: 10187431 Manufacturer Communication Number: 18NA156   Summary This technical bulletin provides a procedure to replace the dehydrator to correct the condition of A/C Inoperative and/or Insufficient Cooling due to the seals going bad within the part.   58 Affected Products Vehicles MAKE MODEL YEAR CADILLAC ESCALADE 2014-2018 CADILLAC ESCALADE ESV 2014-2018 CHEVROLET SILVERADO 1500 … 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

Possible Crank No Start or Extended Crank with DTC P12A6 – 2020-2021 Cadillac Chevrolet GMC

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2021 Chevrolet Suburban

NHTSA ID Number: 10187763 Manufacturer Communication Number: 20NA218   Summary This technical bulletin provides repair information to correct a customer concern of Possible Crank No Start or Extended Crank with DTC P12A6.   13 Affected Products Vehicles MAKE MODEL YEAR CADILLAC ESCALADE 2021 CADILLAC ESCALADE ESV 2021 CHEVROLET CORVETTE 2020 CHEVROLET SILVERADO 1500 2019-2020 CHEVROLET SILVERADO 2500 … Read more

Diagnostic Tip to Diagnose Emission Reduction Fluid Tank Heater Element Exposed to Diesel Exhaust Fluid (DEF) , Service Emission System/Service Exhaust Fluid System Displayed on the Driver Information Center (DIC), Malfunction Indicator Lamp (MIL) Illuminated – DTC P20BB and/or P20C3 Set – 2020-2021 Cadillac Chevrolet GMC

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2021 Chevrolet Suburban

NHTSA ID Number: 10187767 Manufacturer Communication Number: 21NA002   Summary This informational bulletin provides a test procedure, for a possible faulty DEF Heater.   13 Affected Products Vehicles MAKE MODEL YEAR CADILLAC ESCALADE 2021 CADILLAC ESCALADE ESV 2021 CHEVROLET SILVERADO 1500 2020-2021 CHEVROLET SILVERADO 2500 2020-2021 CHEVROLET SUBURBAN 2021 GMC SIERRA 1500 2020-2021 GMC SIERRA 2500 2020-2021 … 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