2021

Diesel Fuel System Contamination, Malfunction Indicator Lamp (MIL) Illuminated – DTC P026D, P2A00, P0171, P0172 and/or P0300 Set – 2017-2023 Cadillac Chevrolet GMC

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Chevrolet GMC Cadillac

NHTSA ID Number: 10222658 Manufacturer Communication Number: 18-NA-361 Summary This technical bulletin provides a procedure to flush the cooler lines to validate if there is excessive debris in the fuel system caused by a failed part.   Condition Some customers may comment that the MIL is illuminated.   Note: If removing the fuel filter from the filter … Read more

Howling, Whining/Whirring, Shudder/Vibration, and/or Grinding Noise While in 4HI, 4HI Auto and/or During Parking Lot Maneuvers in Auto Mode – 2014-2021 Cadillac Chevrolet GMC

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2019 Chevrolet Suburban

NHTSA ID Number: 10187383 Manufacturer Communication Number: 19NA136   Summary This service bulletin provides a diagnostic procedure to aid in correcting a customer concern of a Howling, Whining/Whirring Noise, Shudder/Vibration and/or Grinding Noise While in 4HI, 4HI Auto and/or During Parking Lot Maneuvers in Auto Mode.   64 Affected Products Vehicles MAKE MODEL YEAR CADILLAC ESCALADE 2015-2019 … 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

Coolant Leak, Coolant Consumption and/or Low Coolant Message Being Displayed On the Driver Information Center (DIC) – 2017-2023 Chevrolet Silverado & GMC Sierra

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2020 Chevrolet Silverado

NHTSA ID Number: 10222656 Manufacturer Communication Number: 18-NA-098 Summary This informational bulletin provides information for the technicians on where to look on the Duramax engine for coolant leaks.   Condition Some customers may comment on a coolant leak, coolant consumption and/or low coolant message being displayed on the driver information center (DIC).   Correction Use the illustrations … Read more

Diesel Exhaust System Configuration and DPF Soot Accumulation, Malfunction Indicator Lamp (MIL) Illuminated – DTC P2463 Set – 2017-2023 Chevrolet Silverado & GMC Sierra

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2020 Chevrolet Silverado

NHTSA ID Number: 10222654 Manufacturer Communication Number: 17-NA-374 Summary This informational bulletin advises the technician of how the Soot information has changed from grams to percentage.   Information The following is a list of topics below that are included in the bulletin explaining DPF Soot Accumulation: Reading The Soot Level In % Instead Of Grams Service Regeneration … Read more