Diagnostic Tips | Page 3 Of 142

Identify Engine Misfiring and/or Malfunction Indicator Lamp (MIL) Illuminated – DTC P0300 Setting – 2017-2023 Chevrolet Silverado & GMC Sierra

January 31, 2023 by oemdtc

NHTSA ID Number: 10222659 Manufacturer Communication Number: 19-NA-187 Summary This bulletin provides additional information on how to graph a cylinder misfire and a possible diagnostic cause. Condition Some customers may comment on one or more of the following conditions: MIL illuminated Engine misfire Some technicians may find DTC P0300 set in the Engine Control Module (ECM). … Read more

Engine Coolant Reservoir Overfilled With Discolored Coolant Possible Engine Overheat Transmission Shake Shudder Vibration Shift Performance Or Slipping – 2021-2022 Cadillac Chevrolet GMC

January 31, 2023 by oemdtc

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

Vehicle Unable to Charge, Charge Port Lock Actuator Engaged and Will Not Unlock with DTCs P3014 and/or P302D Set – 2019 Chevrolet Bolt EV

January 31, 2023 by oemdtc

NHTSA ID Number: 10217635 Manufacturer Communication Number: 22-NA-152 Summary This service bulletin provides repair information to correct a customer concern of Vehicle Unable to Charge, Charge Port Lock Actuator Engaged and Will Not Unlock with DTCs P3014 and/or P302D Set. Condition Some customers may comment that they are no longer able to charge their vehicle due … Read more

Malfunction Indicator Lamp (MIL) Illuminated with DTC P2251 and/or DTC P2254 Set – 2020-2022 Cadillac Chevrolet

January 31, 2023 by oemdtc

NHTSA ID Number: 10222797 Manufacturer Communication Number: 22-NA-019 Summary This service bulletin provides repair information to correct a customer concern of Malfunction Indicator Lamp (MIL) Illuminated with DTC P2251 and/or DTC P2254 Set. Condition Some customers may comment on a MIL illuminated in the driver information center (DIC). Technicians may find DTC P2251 (Heated Oxygen Sensor … Read more

Possible Tick or Rattle Noise Concern from Left and/or Right Side Rocker Cover – 2022 Cadillac Chevrolet GMC

January 30, 2023 by oemdtc

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