Diagnostic Tips

Poor Engine Performance in Extremely Cold Weather Conditions, PCV Bypass Hose and Charge Air Cooler Icing for LUV Engines, Malfunction Indicator Lamp (MIL) Illuminated – DTC P0299, P0234, P2227, P00C7 Set – 2013-2021 Buick Encore & Chevrolet Trax

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Chevrolet Buick

NHTSA ID Number: 10222825 Manufacturer Communication Number: 16-NA-405 Summary This service bulletin provides a procedure to install a PCV heater or a charge air cooler to correct the turbo charger system from freezing causing cold weather performance issues.   Condition Some customers may comment that when driving in extremely cold weather conditions (-18°C or less / 0°F … Read more

LM2 Diesel with a Rear Main Oil Leak with or without DTC P06DD Set – 2020-2023 Cadillac Chevrolet GMC

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Chevrolet GMC Cadillac

NHTSA ID Number: 10222664 Manufacturer Communication Number: 22-NA-022 Summary This Informational bulletin advises the technician of a possible oil leak at the front cover and how to diagnose it to verify if it is coming from the seal or not.   Condition Some customers may comment on a oil leak. The technician may find DTC P06DD set. … Read more

Air Conditioning is Not Blowing Cold Air – 2020-2021 Chevrolet Corvette

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2021 Chevrolet Corvette

NHTSA ID Number: 10222665 Manufacturer Communication Number: 22-NA-041 Summary This service bulletin provides repair information to correct a customer concern of Air Conditioning Not Blowing Cold Air.   Condition Some customers may comment on the air conditioner (A/C) not blowing cold air.   Cause The cause of the condition may be the air conditioning clutch is open. … Read more

Possible Crank No Start or Extended Crank with DTC P12A6 or Service Safety Restraints Message on DIC, with B0073 – 2018-2023 Chevrolet Holden GMC

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2023 Chevrolet Equinox

NHTSA ID Number: 10222667 Manufacturer Communication Number: 22-NA-170 Summary This bulletin offers Information on Possible Crank No Start or Extended Crank with DTC P12A6 or Service Safety Restraints message on DIC, with B0073.   Condition A customer may come in with a complaint of a no start, extended cranking time, a dead battery, a fuel pump that … Read more

Malfunction Indicator Lamp (MIL) Illuminated – DTC P026A Set – 2017-2023 Chevrolet Silverado & GMC Sierra

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2023 Chevrolet Silverado

NHTSA ID Number: 10222655 Manufacturer Communication Number: 18-NA-011 Summary Informational bulletin explaining how a plow may cause overheating and engine damage when traveling over 45 mph.   Condition Some customers may comment that the MIL is illuminated Some technicians may find DTC P026A set on vehicles with a snow plow installed.   Information Note: When a snow … Read more