NHTSA ID Number: 10222782 Manufacturer Communication Number: 20-NA-082 Summary This informational bulletin explains why more DEF is being used in diesel engines due to new emission standards. Condition Some customers may comment that excessive DEF is being used. Some technicians may find no codes set or messages on the DIC. Information The current 2020 Silverado/Sierra … Read more
NHTSA ID Number: 10226385 Manufacturer Communication Number: PIP5845A Summary This Preliminary information communicates to the dealer technician that if the vehicle’s engine coolant reservoir has transmission fluid in it or if Glycol it found in the transmission fluid the dealer should replace the Automatic Transmission Fluid Cooling Exchanger. The dealer should refer to bulletin 08-07-30-035 for the recommended components … Read more
NHTSA ID Number: 10222798 Manufacturer Communication Number: 22-NA-060 Summary This informational bulletin provides a procedure to install an isolator over the valve cover if found missing and corrects the customers concern. Condition Some customers may comment that they hear a tick or rattle type noise coming from the engine compartment – This noise may be noticeable … Read more
NHTSA ID Number: 10222834 Manufacturer Communication Number: 22-NA-190 Summary This technical bulletin provides repair information to correct a customer concern of Rear Hatch Liftgate Window Glass Inoperative. Condition Some customers may experience the switch on the vehicle to open the rear hatch window glass may be inoperative, the key fob switch will continue to work. … Read more
NHTSA ID Number: 10222835 Manufacturer Communication Number: 22-NA-191 Summary This service bulletin provides repair information to correct a customer concern of Super Cruise Enhancement: Trailering and Active Lane Change failed installation. Condition Some customers may comment that the Super Cruise enhancement purchased through OnStar application has failed installation. Message on infotainment screen indicates “Installation Failed, See … Read more