# Service bulletin 18NA156

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: 10187431
- Published by NHTSA: 2021\-02\-22
- Manufacturer's number: 18NA156
- Manufacturer's date: 2018\-08\-08
- NHTSA component: EQUIPMENT:APPLIANCE:AIR CONDITIONER

## NHTSA's summary

This technical bulletin provides a procedure to replace the dehydrator to correct the condition of A/C Inoperative and/or Insufficient Cooling due to the seals going bad within the part.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2018/MC-10187431-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2018/MC-10187431-9999.pdf)

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

## Components

Equipment and accessories, Heating and air conditioning

## Vehicles listed

- 2014 to 2018 CADILLAC ESCALADE
- 2014 to 2016 CADILLAC ESCALADE ESV
- 2017 to 2018 CADILLAC ESCALADE ESV
- 2013 to 2014 CHEVROLET SILVERADO 1500
- 2017 to 2018 CHEVROLET SILVERADO 1500
- 2013 to 2018 CHEVROLET SILVERADO 2500
- 2013 to 2018 CHEVROLET SUBURBAN
- 2013 to 2018 CHEVROLET TAHOE
- 2014 GMC SIERRA 1500
- 2013 to 2018 GMC SIERRA 2500
- 2013 GMC SIERRA DENALI
- 2015 to 2018 GMC SIERRA DENALI
- 2013 to 2018 GMC YUKON
- 2013 GMC YUKON DENALI
- 2013 GMC YUKON DENALI XL
- 2013 to 2014 GMC YUKON XL
- 2015 to 2018 GMC YUKON XL

## Recalls for the same vehicles and component

- [21V496000](/recalls/nhtsa/21V496000.md), 2021-07-01: EQUIPMENT:ELECTRICAL:ENGINE BLOCK HEATER
- [18V267000](/recalls/nhtsa/18V267000.md), 2018-04-26: EQUIPMENT
- [13V544000](/recalls/nhtsa/13V544000.md), 2015-10-30: EQUIPMENT:OTHER:LABELS
- [14V345000](/recalls/nhtsa/14V345000.md), 2014-06-18: EQUIPMENT; VEHICLE SPEED CONTROL:ACCELERATOR PEDAL
- [2014216](/recalls/tc/2014216.md), 2014-06-06: Accessories

## Other bulletins for the same vehicles and component

- [PI0488C](/bulletins/10254219.md), 2024-05-06, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; POWER TRAIN. Diagnostic Information for Transmission.
- [PI0718B](/bulletins/10253616.md), 2024-04-29, Service bulletin: EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. Audio System Speaker Rattle, Buzz Noise, Poor Sound
- [PI0695A](/bulletins/10253610.md), 2024-04-29, Service bulletin: VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. Diagnosis and Repair HVAC Blower Function.
- [PI0688F](/bulletins/10253605.md), 2024-04-29, Service bulletin: EQUIPMENT:ELECTRICAL:INFOTAINMENT:BLUETOOTH/WIFI. Poor Voice Quality During Bluetooth Call or OnStar® Personal Call.
- [PI0688E](/bulletins/10253604.md), 2024-04-29, Service bulletin: EQUIPMENT:ELECTRICAL:INFOTAINMENT:BLUETOOTH/WIFI. Poor Voice Quality During Bluetooth Call or OnStar® Personal Call.
- [PI0688D](/bulletins/10253603.md), 2024-04-29, Service bulletin: EQUIPMENT:ELECTRICAL:INFOTAINMENT:BLUETOOTH/WIFI. Poor Voice Quality During Bluetooth Call or OnStar® Personal Call.
- [PI0657A](/bulletins/10253585.md), 2024-04-29, Service bulletin: EQUIPMENT; STRUCTURE:BODY:HATCHBACK/LIFTGATE. Liftgate Paint Damage Evident at Lower Outer Edge of Applique.
- [20\-NA\-132](/bulletins/10253527.md), 2024-04-23, Service bulletin: EQUIPMENT; ELECTRICAL SYSTEM. This warranty administration bulletin provides policy information on the requirements for 12V battery testing and warranty replacements.
- [17\-NA\-052](/bulletins/10253526.md), 2024-04-23, Service bulletin: WHEELS; EQUIPMENT. This bulletin updates the position of General Motors on refinishing aluminum wheels. GM has determined that wheel refinishing under warranty will no longer be performed.
- [PIP5123B](/bulletins/10253361.md), 2024-04-22, Service bulletin: EQUIPMENT:ELECTRICAL. SES Lamp On With DTC P2270.

JSON: [/v1/bulletins/10187431](/v1/bulletins/10187431)

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