2020

Cooling System Contaminated With Engine Oil – 2010-2021 Buick Cadillac Chevrolet GMC

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2020 Buick Enclave

NHTSA ID Number: 10198879 Manufacturer Communication Number: 21NA108   Summary This service bulletin provides diagnostic information for the technician regarding a customer concern of engine overheating, cooling system contaminated with engine oil.     Condition Engine is overheating. One or more of the following conditions: Oil in the coolant overflow reservoir Coolant discharging from the coolant reservoir … Read more

Information on Engine Oil Consumption Guidelines – GM Passenger Cars & Gasoline-Powered Light Duty Trucks

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General Motors

NHTSA ID Number: 10222734 Manufacturer Communication Number: 01-06-01-011M Summary This service bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.   All engines require oil to lubricate and protect the load bearing and internal moving parts from wear including cylinder walls, pistons and piston rings. When a piston moves down its cylinder, a … Read more

Guidelines When Changing Tire And Wheel Size – 2003-2020 General Motors Light Duty Trucks / Utilities / Vans

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2020 Chevrolet Suburban

NHTSA ID Number: 10184105 Manufacturer Communication Number: PIT3271K   Summary This Preliminary Information communication provides information to the technician about changing the tire and wheel size on vehicles. General Motors will only support a tire calibration for tires that have been sized, tested and designed for the vehicle in question and its applications. Technician should not use … Read more

Information on Summer Tire Performance and Tire Cold Weather Cracking – Buick Cadillac Chevrolet

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2017 Chevrolet Corvette

NHTSA ID Number: 10183781 Manufacturer Communication Number: 130310001G   Summary This service bulletin provides information on tire cold weather cracking and the proper techniques on taking care of the tires and proper use.     Cold Weather Operation These vehicles are all equipped with 3 season performance tires commonly referred to as “Summer Tires.” The rubber used … Read more

Information for Electrical Ground Repair – 2020 and Prior GM Passenger Cars and Trucks

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2020 Chevrolet Silverado

NHTSA ID Number: 10163268 Manufacturer Communication Number: 100845001G   Summary This bulletin provides information for electrical ground repairs using new General Motors replacement fasteners with conductive finish.     Electrical Ground Repair Overview Proper electrical system function relies on secure, stable and corrosion-free electrical ground connections. Loose, stripped, or corroded connections increase the possibility of improper system … Read more