# Service bulletin DOC\-1034500

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: 10165494
- Published by NHTSA: 2019\-10\-03
- Manufacturer's number: DOC\-1034500
- Manufacturer's date: 2019\-09\-30
- NHTSA component: ENGINE AND ENGINE COOLING; EQUIPMENT:APPLIANCE:AIR CONDITIONER

## NHTSA's summary

Service Solution to fix AC cooling performance due to improper HVAC function.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2019/MC-10165494-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2019/MC-10165494-9999.pdf)

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

## Components

Engine, Equipment and accessories, Heating and air conditioning

## Vehicles listed

- 2018 to 2020 WESTERN STAR 4700
- 2017 to 2020 WESTERN STAR 4800
- 2017 to 2020 WESTERN STAR 4900
- 2017 to 2020 WESTERN STAR 5700
- 2017 to 2020 WESTERN STAR 6900

## Recalls for the same vehicles and component

- [22V338000](/recalls/nhtsa/22V338000.md), 2022-05-16: EQUIPMENT:OTHER:LABELS
- [20V634000](/recalls/nhtsa/20V634000.md), 2020-10-14: EQUIPMENT:OTHER:LABELS; TIRES
- [20V211000](/recalls/nhtsa/20V211000.md), 2020-04-10: EQUIPMENT:OTHER:LABELS
- [19V792000](/recalls/nhtsa/19V792000.md), 2019-11-04: VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:REAR WINDOW
- [18V581000](/recalls/nhtsa/18V581000.md), 2018-08-30: ENGINE AND ENGINE COOLING:ENGINE:DIESEL
- [2017636](/recalls/tc/2017636.md), 2017-12-18: Accessories
- [17V810000](/recalls/nhtsa/17V810000.md), 2017-12-15: EQUIPMENT
- [17V452000](/recalls/nhtsa/17V452000.md), 2017-07-17: EQUIPMENT
- [16V416000](/recalls/nhtsa/16V416000.md), 2016-06-09: ENGINE AND ENGINE COOLING:ENGINE:DIESEL
- [2016285](/recalls/tc/2016285.md), 2016-06-06: Engine

## Other bulletins for the same vehicles and component

- [CXA\_10\_25\_Conmet Oil Pan](/bulletins/11024958.md), 2025-11-05, Other: ENGINE. CX Advocate for ConMet Oil Pan Insert Additional Issues
- [CXA 3\_25\_NOx](/bulletins/11016309.md), 2025-04-02, Other: ENGINE. CX Advocate for NOx conversion low faults
- [CXA 2\_25\_Turbo Oil Drain](/bulletins/11014819.md), 2025-03-04, Other: ENGINE. CX Advocate for turbo oil drain cracking
- [CXA 2\_25\_NOx](/bulletins/11014818.md), 2025-03-04, Other: ENGINE. CX Advocate for NOx conversion low faults
- [TSB01\-001\-DDC](/bulletins/11014775.md), 2025-03-04, Service bulletin: ENGINE. Technical Service Bulletin for GHG17 and Newer DD Platform Heavy Duty Oil Pan Drain Plug Inserts
- [CXA 1\_16\_Turbo Oil Drain](/bulletins/11013206.md), 2025-01-29, Other: ENGINE. CX Advocate for turbo oil drain cracking
- [CXA 1\_16\_NOx](/bulletins/11013204.md), 2025-01-29, Other: ENGINE. CX Advocate for NOx conversion low faults
- [CXA 1\_16\_GATS2.4](/bulletins/11013201.md), 2025-01-29, Other: ENGINE. CX Advocate for GATS2.4 being expanding to DD15
- [CXA 1\_16\_DD13 Altitude](/bulletins/11013199.md), 2025-01-29, Other: ENGINE. CX Advocate for DD13 Gen 5 engines operating at high altitude experience EGR slow response fault.
- [CXA 1\_16\_CARB Truck Chec](/bulletins/11013196.md), 2025-01-29, Other: ENGINE. CX Advocate for CARB tightening the Readiness Criteria applied to On\-Board Diagnostic \(OBD\) test submissions for the Clean Truck Check.

JSON: [/v1/bulletins/10165494](/v1/bulletins/10165494)

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