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Service bulletin PIT6255

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 id11011431
Published by NHTSA2024-12-05
Manufacturer's numberPIT6255
Manufacturer's date2024-10-09
NHTSA componentSUSPENSION

NHTSA's summary

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

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

Vehicles listed
CADILLAC ESCALADE2021, 2022, 2023, 2024
CADILLAC ESCALADE ESV2021, 2022, 2023, 2024
CHEVROLET SILVERADO EV2024, 2025 (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 PICKUP2022, 2023, 2024, 2025
GMC SIERRA EV2024, 2025 (the catalog's model; the bulletin names a series or trim of it)
GMC YUKON2021, 2022, 2023, 2024
GMC YUKON XL2021, 2022, 2023, 2024

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.
N2525275002025-11-12. Service campaign. 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.
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.
N2525075002025-09-17. Service campaign. 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.
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.
N2525088002025-06-24. Service campaign. Customer Satisfaction Program. Certain vehicles listed above may have improper lubrication of the rear axle assembly. Dealers will replace the rear axle.
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.