Service bulletin PIP5981A
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
| Type | Service bulletin |
|---|---|
| NHTSA id | 11007738 |
| Published by NHTSA | 2024-09-12 |
| Manufacturer's number | PIP5981A |
| Manufacturer's date | 2024-09-12 |
| NHTSA component | POWER TRAIN |
NHTSA's summary
This Preliminary information communicates ordering process for the front and rear drive units are on restriction for all listed EV vehicles for engineering review.
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Components
Transmission and driveline
| BRIGHTDROP ZEVO 400 | 2024 (the catalog's model; the bulletin names a series or trim of it) |
|---|---|
| BRIGHTDROP ZEVO 600 | 2023, 2024 (the catalog's model; the bulletin names a series or trim of it) |
| CADILLAC LYRIQ | 2023, 2024 |
| CHEVROLET BLAZER EV | 2024 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET EQUINOX EV | 2024 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO EV | 2024 (the catalog's model; the bulletin names a series or trim of it) |
| GMC HUMMER EV PICKUP | 2023, 2024 |
| GMC SIERRA EV | 2024 (the catalog's model; the bulletin names a series or trim of it) |
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| N252502891-01 | 2026-08-20. Service campaign. Certain vehicles may have a condition in which the internal differential nut was cross threaded or missing during assembly. Dealers will review the vehicles service history in IVH, and if necessary, replace the rear electric drive transmission module. |
|---|---|
| N252502890-01 | 2026-08-20. Service campaign. Certain vehicles may have a condition in which the internal differential nut was cross threaded or missing during assembly. Dealers will review the vehicles service history in IVH, and if necessary, replace the front electric drive transmission module. |
| N242471460-01 | 2026-08-20. Service campaign. Certain vehicles may have been built with an Electric Drive Unit mounting bolt that is too long, causing damage to the Drive Unit case. Dealers will inspect and replace the Electrical Drive Unit if necessary. |
| 24-NA-262 | 2025-12-03. Service bulletin. This bulletin helps aid the tech in possible 10L100 transmission noise that may be normal or abnormal depending on the concern noted. |
| 25-NA-108 | 2025-10-27. Service bulletin. This bulletin provides a procedure to inspect and verify the drive shafts are over extending past the 5mm tolerance, causing the customers concern of a fluid leak under the vehicle. |
| 24-NA-133 | 2025-10-25. Service bulletin. This informational bulletin provides information on Wheel Drive Shaft Retention Snap Ring Design Change. |
| 22-NA-182 | 2025-09-27. Service bulletin. This service bulletin advises the technician to check if the transmission cooler lines are twisted to correct customer concerns of Harsh Shift, Shudder, Surge, Stall, Transmission Overheating and/or High Transmission Fluid Temperature. |
| 25-NA-014 | 2025-07-08. Service bulletin. This bulletin provides a procedure to overhaul the control valve to replace a plate and worn down check ball to correct the customers concern of No Reverse, No Shift Past Third Gear - DTC P2732 Set. |
| 24-NA-078 | 2025-07-08. Service bulletin. This bulletin advises the tech to replace the starter and not the trans if grinding or growling is heard from the transmission area. |
| 24-NA-075 | 2025-07-07. Service bulletin. This bulletin provides a procedure to add a shim to the rear axle to change the pitch of said axle to correct the angle of the axle to pinion variance. |