# Service bulletin PIT6304

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: 11011891
- Published by NHTSA: 2024\-12\-17
- Manufacturer's number: PIT6304
- Manufacturer's date: 2024\-12\-14
- NHTSA component: SUSPENSION

## NHTSA's summary

This Preliminary information communicates a diagnostic Aid from root causing DTC: C1197 caused by a pinched air inlet hose to the suspension compressor air leveling system.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-11011891-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-11011891-9999.pdf)

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

## Components

Suspension

## Trouble codes named

C1197

## Vehicles listed

- 2024 to 2025 CHEVROLET SILVERADO EV
- 2024 to 2025 GMC SIERRA EV

## Other bulletins for the same vehicles and component

- [25\-NA\-152](/bulletins/11025555.md), 2025-11-15, Service bulletin: SUSPENSION. this bulletin advises the tech not to replace the shock for possible air leak, but to replace the air valve on the shock.
- [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.
- [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.
- [PIT6304A](/bulletins/11013388.md), 2025-02-03, Service bulletin: SUSPENSION. This Preliminary information communicates a diagnostic Aid from root causing DTC: C1197 sym 92 caused by a pinched air inlet hose to the suspension compressor air leveling system.
- [PIT6255](/bulletins/11011431.md), 2024-12-05, Service bulletin: SUSPENSION. This Preliminary information communicates a diagnostic tip when experiencing an error when trying to perfom a trim height learn or review pressure data in GDS

JSON: [/v1/bulletins/11011891](/v1/bulletins/11011891)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20PIT6304&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11011891&vehicle=Service%20bulletin%20PIT6304)