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, P0236, P2261, P2227, P00C7 Set – 2011-2020 Buick Chevrolet Opel Vauxhall

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General Motors

NHTSA ID Number: 10219393 Manufacturer Communication Number: 22-NA-067 Summary This service bulletin provides a repair procedure to correct customer concerns of Poor Engine Performance in Extremely Cold Weather Conditions, PCV Bypass Hose and Charge Air Cooler Icing for LUV Engines, Malfunction Indicator Lamp (MIL) Illuminated.   Condition Some customers may comment that when driving their vehicle, they … Read more

Service Safety Restraint System Message with DTC B1A7A Set – 2022 Buick Envision

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2022 Buick Envision

NHTSA ID Number: 10218888 Manufacturer Communication Number: 22-NA-162 Summary This technical bulletin provides repair information to correct a customer concern of Service Safety Restraint System Message with DTC B1A7A Set.   Condition Some customers may comment that during an Autostart event the overhead console may incorrectly cause a “Service Safety Restraint System” message in the Driver Instrument … Read more

Service Power Steering Message with DTC U3000 Set – 2022 Buick Envision

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2022 Buick Envision

NHTSA ID Number: 10218889 Manufacturer Communication Number: 22-NA-163 Summary This technical bulletin provides repair information to correct a customer concern of Service Power Steering Message with DTC U3000 Set.   Condition Some customers may comment on a “Service Power Steering” message in the Driver Instrument Cluster. Technician may find DTC U3000 set current or in recent history. … Read more

Checking Exhaust System for Leaks, Malfunction Indicator Lamp (MIL) Illuminated – DTC P2C7A and/or P0421 Set – 2020-2023 Cadillac Chevrolet GMC

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Chevrolet GMC Cadillac

NHTSA ID Number: 10222807 Manufacturer Communication Number: 22-NA-168 Summary This bulletin provides diagnostic information when checking the exhaust system for leaks.   Condition Some customers may comment that the MIL is illuminated. Technicians may comment on one or more of the following DTCs set in the Engine Control Module (ECM): P11D5: Nitrogen Oxides Sensor 2 Exceeded Minimum … Read more

8L45 8L90 No Movement After Valve Body Replacement – 2015-2023 Cadillac Chevrolet GMC

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Chevrolet GMC Cadillac

NHTSA ID Number: 10220314 Manufacturer Communication Number: 22-NA-176 Summary This technical bulletin provides information on a possible bolt and guide pin that may be missing from the control valve which will need to be installed to correct the repair.   Condition Some technicians may comment on no movement after the valve body replacement.   Cause This may … Read more