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Service bulletin PIT5818

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 id10190424
Published by NHTSA2021-04-19
Manufacturer's numberPIT5818
Manufacturer's date2021-03-24
NHTSA componentVEHICLE SPEED CONTROL; STEERING

NHTSA's summary

This Preliminary information communicates an issues will low or poor heater performance on the drivers side. Dealers are to inspect the HVAC temperature door linkage and if ok replace the heater core.

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

Steering, Throttle and cruise control

Vehicles listed
CADILLAC ESCALADE ESV2021
CHEVROLET SILVERADO 15002019 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 15002021 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 25002020 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SUBURBAN2021
CHEVROLET TAHOE2021
GMC SIERRA 15002019 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA 15002021 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA 25002020 (the catalog's model; the bulletin names a series or trim of it)
GMC YUKON XL2021

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20213802021-06-17. Steering
21V4550002021-06-17. STEERING:STEERING CONTROL MODULE

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
23-NA-2012025-10-21. Service bulletin. This service bulletin advises the technician of a possible loose ground that may be causing customer concerns of Loss of Steering Assist and/or Loss of Brake Assist and Malfunction Indicator Lamp (MIL) Illuminated.
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.
21-NA-1662025-06-06. Service bulletin. This informational bulletin provides information on the turn signal stalk not cancelling and/or mis cancelling.
13-02-32-001H2025-05-06. Service bulletin. This service bulletin provides a procedure to flush and bleed power steering system to correct a power steering noise or fluid leak concern that is caused during extremely low temperatures.
23-NA-1852025-04-28. Service bulletin. This service bulletin helps diagnose/reduce possible CCND issues on Transfer Cases - Service 4WD on DIC, Intermittent Failures, Noise Concerns, Driveline/Steering Vibration/Shudder, Intermittent DTCs/MIL Illuminated, Engagement/Disengagement/Ratcheting Concerns.
25-NA-0652025-04-24. Service bulletin. This informational bulletin instructs the tech when fuel/fluid is needed to be tested and where it can be sent for analysis.
16-NA-1092025-02-28. Service bulletin. This service bulletin provides a procedure inspecting for excess grease or Sealant on the Exterior of the steering gear due to seeing grease or sealant on certain locations on the gear.
10-08-110-001L2025-02-11. Service bulletin. This service bulletin provides information on proper use of floor mats.
25-NA-0192025-02-11. Service bulletin. This bulletin advises the tech to check other areas that may need repair before replacing the wheel speed sensor.
24-NA-2392025-01-30. Service bulletin. This informational bulletin provides a guide on how to diagnose and test for vibrations utilizing the PicoScope.