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Service bulletin PIT5986A

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 id10237657
Published by NHTSA2023-06-13
Manufacturer's numberPIT5986A
Manufacturer's date2023-05-12
NHTSA componentSUSPENSION

NHTSA's summary

This Preliminary information communicates a diagnostic tip for a thump, click, pop, clunk type noise that is heard from the front end. Dealers are to inspect for something contacting the grill shutters as they open and close.

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 ESCALADE ESV2021, 2022, 2023
CHEVROLET SILVERADO 15002021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 25002021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 35002021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SUBURBAN2021, 2022, 2023
CHEVROLET TAHOE2021, 2022, 2023
GMC SIERRA 15002021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA 25002021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA 35002021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
GMC YUKON XL2021, 2022, 2023

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-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.
21-NA-1382025-02-19. Service bulletin. This service bulletin provides a repair procedure to correct a customer concern of a Squeak, Grind or Clunking Noise from Rear Leaf Springs.