Auxiliary Pump Noise During Start/Stop Event (18-NA-059)
Publication date: 2018-02-22Reference number: 18-NA-059
AUXILIARY PUMP NOISE DURING START/STOP EVENT
TECHNICAL SERVICE BULLETIN
Reference Number(s): 18-NA-059, Date of Issue:
Feb 22, 2018
SERVICE INFORMATION
| Brand: | Model: | Model Year: | VIN: | Engine: | Transmission: | ||
|---|---|---|---|---|---|---|---|
| from | to | from | to | ||||
| Buick | Regal | 2018 | 2018 | All | All | ||
| Involved Region or Country | North America |
| Condition | Some customers may comment on an auxiliary pump noise during a start/stop event. |
| Cause | This may be due to the auxiliary pump coming on during the vehicle stop/start to meet the heater performance requirements during colder ambient temperatures. |
| Correction | Do not replace parts. The auxiliary pump is working as designed. |
SERVICE PROCEDURE
If you encounter a vehicle with the above concern, do not replace any parts. The auxiliary pump is working as intended.
PARTS INFORMATION
No parts needed for this condition.
CUSTOMER INFORMATION
Please communicate to the customer this condition is a normal operating characteristic of their vehicle. It will not impact the designed performance or reliability of the vehicle. Please share this information with the customer, including a copy of this message.
SERVICE INFORMATION
| Version | 1 |
| Modified | Released February 22, 2018 |