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Service bulletin PIT6144B

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11007692
Published by NHTSA2024-09-11
Manufacturer's numberPIT6144B
Manufacturer's date2024-09-11
NHTSA componentSUSPENSION

NHTSA's summary

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

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

Suspension

Trouble codes named

C1197

Vehicles listed
CADILLAC ESCALADE2021, 2022, 2023, 2024
CHEVROLET SILVERADO EV2024 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SUBURBAN 15002021, 2022, 2023, 2024 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET TAHOE2021, 2022, 2023, 2024
GMC HUMMER EV PICKUP2024
GMC SIERRA EV2024 (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.

Recalls for the same vehicles and component
23V6420002023-09-20. SUSPENSION:REAR

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
25-NA-1522025-11-15. Service bulletin. this bulletin advises the tech not to replace the shock for possible air leak, but to replace the air valve on the shock.
25-NA-1102025-10-16. Service bulletin. This bulletin advises the techs that the front and or rear shocks need to be replaced as a set and not 1 at a time to avoid the road and ride performance not to be compromised.
25-NA-1102025-08-21. Service bulletin. This bulletin advises the techs that the front and or rear shocks need to be replaced as a set and not 1 at a time to avoid the road and ride performance not to be compromised.
PI0281L2025-06-12. Service bulletin. This preliminary informational (PI) bulletin provides information to dealership personnel that may be helpful when addressing underbody component corrosion with customers.
24-NA-0992025-03-14. Service bulletin. This bulletin provides a service procedure to replace the sway bar bracket retainers if found the cause of the clunking noise from front of vehicle.
05-03-07-009L2025-03-08. Service bulletin. This service bulletin provides information on Wheel Alignment Specifications, Requirements and Recommendations for GM Vehicles.
19-NA-1292025-03-05. Service bulletin. 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.
PIT5981B2025-03-02. Service bulletin. This Preliminary information communicates a tip when diagnosing an inoperative air leveling suspension system and to repair any loss of comm DTC's with the power window motors first.
PIT6144F2025-03-02. Service bulletin. 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.
22-NA-1402025-02-28. Service bulletin. This informational bulletin advises the technician of an upgraded rear coil spring if the rear sags to much from loaded equipment.