DTC P0621 - Service Charging System Displayed (PIC6593A)
WARNING: This page is about the Trax ACTIV, which is a different variant/trim than selected.
Publication date: 2025-04-11Reference number: PIC6593A
Supersedes refnos: PIC6593
DTC P0621 - SERVICE CHARGING SYSTEM DISPLAYED
TECHNICAL SERVICE BULLETIN
Reference Number(s): PIC6593A, Date of Issue:
Apr 11, 2025
SERVICE INFORMATION
| Brand: | Model: | Model Year: | VIN: | Engine: | Transmission: | ||
|---|---|---|---|---|---|---|---|
| from | to | from | to | ||||
| Buick | Encore GX | 2024-2025 | All | All | All | All | |
| Chevrolet | Trailblazer | 2024-2025 | All | All | All | All | |
| Involved Region or Country | North America |
| Condition | Customers may comment that the CEL/MIL is illuminated along with a service charging system message. Technician may find DTC P0621 set as current or history. |
| Cause | Engineering is currently investigating. |
CORRECTION
Please follow the diagnostic test procedures outlined in SI for DTC P0621.
If the test results do not directly identify a functional fault, other than a warning message/light, do NOT replace any parts at this time.
Engineering is currently investigating.
In the meantime, please advise customer they may continue to drive the vehicle
The PI will be updated or replaced with TSB once a determination has been made.
SERVICE INFORMATION
| Version | 2 |
| Modified | 02/13/2025 - Created on. 04/11/2025 - Updated models |