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Recent Bulletins

 

BULLETINS

Diagnostic Overview, Starting Point, and Programming

#21-NA-095 - Malfunction Indicator Lamp (MIL) Illuminated - DTC P1488 or P24DA Set - (Sep 17, 2021)

Related To: Exhaust / Vehicle DTC Information

#21-NA-207 - Shudder 15mph-13mph When Coasting to a Stop - (Sep 16, 2021)

Related To: Programming and Setup / Engine Mechanical / Engine Controls and Fuel

#21-NA-208 - Changes to the Auto HVAC Control Knob Digital Temperature Display Feature for Certain 2021 Silverado 1500, Sierra 1500 Models Equipped with RPO 00D - (Sep 16, 2021)

Related To: Heating, Ventilation and Air Conditioning / HVAC Systems - Automatic / Entertainment / Programming and Setup

#19-NA-218 - Ticking Noise from the Engine - (Sep 8, 2021)

Related To: Vehicle DTC Information / Engine Mechanical

Driver Information and Entertainment

#21-NA-208 - Changes to the Auto HVAC Control Knob Digital Temperature Display Feature for Certain 2021 Silverado 1500, Sierra 1500 Models Equipped with RPO 00D - (Sep 16, 2021)

Related To: Heating, Ventilation and Air Conditioning / HVAC Systems - Automatic / Entertainment / Programming and Setup

Engine/Propulsion

#21-NA-095 - Malfunction Indicator Lamp (MIL) Illuminated - DTC P1488 or P24DA Set - (Sep 17, 2021)

Related To: Exhaust / Vehicle DTC Information

#21-NA-207 - Shudder 15mph-13mph When Coasting to a Stop - (Sep 16, 2021)

Related To: Programming and Setup / Engine Mechanical / Engine Controls and Fuel

#19-NA-218 - Ticking Noise from the Engine - (Sep 8, 2021)

Related To: Vehicle DTC Information / Engine Mechanical

General Information

#21-NA-135 - Information on Obtaining Techline Calibrations for Law Enforcement and Government Vehicles to Disable or Enable Content - (Sep 14, 2021)

Related To: General Information

HVAC

#21-NA-208 - Changes to the Auto HVAC Control Knob Digital Temperature Display Feature for Certain 2021 Silverado 1500, Sierra 1500 Models Equipped with RPO 00D - (Sep 16, 2021)

Related To: Heating, Ventilation and Air Conditioning / HVAC Systems - Automatic / Entertainment / Programming and Setup

Power and Signal Distribution

#21-NA-149 - Engine Wire Harness Chafing - (Sep 17, 2021)

Related To: Wiring Systems and Power Management

CAMPAIGNS

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PRELIMINARY INFORMATION

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