# Service bulletin 25\-NA\-152

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: 11025555
- Published by NHTSA: 2025\-11\-15
- Manufacturer's number: 25\-NA\-152
- Manufacturer's date: 2025\-10\-03
- NHTSA component: SUSPENSION

## NHTSA's summary

this bulletin advises the tech not to replace the shock for possible air leak, but to replace the air valve on the shock.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11025555-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11025555-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Suspension

## Vehicles listed

- 2024 to 2026 CHEVROLET SILVERADO EV
- 2022 to 2025 GMC HUMMER EV PICKUP
- 2024 to 2025 GMC HUMMER EV SUV
- 2024 to 2026 GMC SIERRA EV

## Other bulletins for the same vehicles and component

- [N252527500](/bulletins/11025484.md), 2025-11-12, Service campaign: SUSPENSION. Certain vehicles may have a condition in which the Rear Spring U\-bolt fasteners are torqued below specification. Dealers are to torque both the right and left side Rear Spring U\-bolt fasteners to specification.
- [N252507500](/bulletins/11023160.md), 2025-09-17, Service campaign: SUSPENSION. Certain vehicles may have a condition in which the rear lower control arm bolts were not fully torqued. Dealers are to perform a rear wheel alignment and properly torque all four rear lower control arm bolts.
- [N252508800](/bulletins/11019703.md), 2025-06-24, Service campaign: SUSPENSION. Customer Satisfaction Program. Certain vehicles listed above may have improper lubrication of the rear axle assembly. Dealers will replace the rear axle.
- [PI0281L](/bulletins/11019516.md), 2025-06-12, Service bulletin: STEERING; POWER TRAIN; SUSPENSION. This preliminary informational \(PI\) bulletin provides information to dealership personnel that may be helpful when addressing underbody component corrosion with customers.
- [05\-03\-07\-009L](/bulletins/11015409.md), 2025-03-08, Service bulletin: SUSPENSION; WHEELS. This service bulletin provides information on Wheel Alignment Specifications, Requirements and Recommendations for GM Vehicles.
- [19\-NA\-129](/bulletins/11015042.md), 2025-03-05, Service bulletin: SUSPENSION. This technical bulletin provides repair information to correct a customer concern of a squeak and/or clunking noise coming from the rear of the vehicle.
- [PIT6144F](/bulletins/11014635.md), 2025-03-02, Service bulletin: SUSPENSION. This Preliminary information communicates A diagnostic tip from root causing DTC: C1197 SYM 92 caused by a pinched air inlet hose to the suspension compressor air leveling system or internal issue with compressor assembly.
- [21\-NA\-138](/bulletins/11014358.md), 2025-02-19, Service bulletin: SUSPENSION. This service bulletin provides a repair procedure to correct a customer concern of a Squeak, Grind or Clunking Noise from Rear Leaf Springs.
- [PIT6144E](/bulletins/11014299.md), 2025-02-18, Service bulletin: SUSPENSION. This Preliminary information communicates A diagnostic tip from root causing DTC: C1197 SYM 92 caused by a pinched air inlet hose to the suspension compressor air leveling system or internal issue with compressor assembly.
- [PIT6144D](/bulletins/11013392.md), 2025-02-03, Service bulletin: SUSPENSION. This Preliminary information communicates A diagnostic tip from root causing DTC: C1197 SYM 92 caused by a pinched air inlet hose to the suspension compressor air leveling system or internal issue with compressor assembly.

JSON: [/v1/bulletins/11025555](/v1/bulletins/11025555)

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