# 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.

- Type: Service bulletin
- NHTSA id: 10190424
- Published by NHTSA: 2021\-04\-19
- Manufacturer's number: PIT5818
- Manufacturer's date: 2021\-03\-24
- NHTSA component: VEHICLE 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

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10190424-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10190424-9999.pdf)

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

## Components

Steering, Throttle and cruise control

## Vehicles listed

- 2021 CADILLAC ESCALADE ESV
- 2019 CHEVROLET SILVERADO 1500
- 2021 CHEVROLET SILVERADO 1500
- 2020 CHEVROLET SILVERADO 2500
- 2021 CHEVROLET SUBURBAN
- 2021 CHEVROLET TAHOE
- 2019 GMC SIERRA 1500
- 2021 GMC SIERRA 1500
- 2020 GMC SIERRA 2500
- 2021 GMC YUKON XL

## Recalls for the same vehicles and component

- [2021380](/recalls/tc/2021380.md), 2021-06-17: Steering
- [21V455000](/recalls/nhtsa/21V455000.md), 2021-06-17: STEERING:STEERING CONTROL MODULE

## Other bulletins for the same vehicles and component

- [23\-NA\-201](/bulletins/11024378.md), 2025-10-21, Service bulletin: SERVICE BRAKES; ELECTRICAL SYSTEM; STEERING. 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.
- [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.
- [21\-NA\-166](/bulletins/11019325.md), 2025-06-06, Service bulletin: EXTERIOR LIGHTING; STEERING. This informational bulletin provides information on the turn signal stalk not cancelling and/or mis cancelling.
- [13\-02\-32\-001H](/bulletins/11017868.md), 2025-05-06, Service bulletin: STEERING. 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\-185](/bulletins/11017255.md), 2025-04-28, Service bulletin: POWER TRAIN; ELECTRICAL SYSTEM; STEERING. 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\-065](/bulletins/11017173.md), 2025-04-24, Service bulletin: STEERING; SERVICE BRAKES; FUEL/PROPULSION SYSTEM. This informational bulletin instructs the tech when fuel/fluid is needed to be tested and where it can be sent for analysis.
- [16\-NA\-109](/bulletins/11014577.md), 2025-02-28, Service bulletin: STEERING. 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\-001L](/bulletins/11014171.md), 2025-02-11, Service bulletin: STRUCTURE:BODY; VEHICLE SPEED CONTROL. This service bulletin provides information on proper use of floor mats.
- [25\-NA\-019](/bulletins/11014138.md), 2025-02-11, Service bulletin: WHEELS; VEHICLE SPEED CONTROL; AIR BAGS; ELECTRICAL SYSTEM; SERVICE BRAKES. This bulletin advises the tech to check other areas that may need repair before replacing the wheel speed sensor.
- [24\-NA\-239](/bulletins/11013269.md), 2025-01-30, Service bulletin: ELECTRICAL SYSTEM; SEATS; STRUCTURE:BODY; STEERING; ENGINE. This informational bulletin provides a guide on how to diagnose and test for vibrations utilizing the PicoScope.

JSON: [/v1/bulletins/10190424](/v1/bulletins/10190424)

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