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Service bulletin 18NA138

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 id10137598
Published by NHTSA2018-05-21
Manufacturer's number18NA138
Manufacturer's date2018-04-26
NHTSA componentELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.

NHTSA's summary

This technical bulletin provides a procedure to replace the HMI module to correct a condition of Radio Control (ICS) Display Does Not Remain Off at Times after it Has Been Turned Off in the Radio Settings Menu due to a software concern.

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

Electrical system, Equipment and accessories

Vehicles listed
BUICK CASCADA2018
BUICK ENCLAVE2018
BUICK ENCORE2018
BUICK ENVISION2018
BUICK LACROSSE2018
BUICK REGAL2018
CADILLAC ATS2018
CADILLAC CT6 PLUG-IN HYBRID2018 (the catalog's model; the bulletin names a series or trim of it)
CADILLAC CTS2018
CADILLAC ESCALADE2018
CADILLAC ESCALADE ESV2018
CADILLAC XT52018
CADILLAC XTS2018
CHEVROLET BOLT EV2018
CHEVROLET CAMARO2018
CHEVROLET CAPTIVA2018
CHEVROLET COLORADO2018
CHEVROLET CORVETTE2018
CHEVROLET CRUZE2018
CHEVROLET EQUINOX2018
CHEVROLET EXPRESS2018
CHEVROLET IMPALA2018
CHEVROLET LOW CAB FORWARD 65002018
CHEVROLET MALIBU2018
CHEVROLET N3002018
CHEVROLET S102018
CHEVROLET SILVERADO 25002018 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 35002018 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SONIC2018
CHEVROLET SPARK2018
CHEVROLET SS2018
CHEVROLET SUBURBAN2018
CHEVROLET TAHOE2018
CHEVROLET TRAILBLAZER2018
CHEVROLET TRAVERSE2018
CHEVROLET TRAX2018
CHEVROLET VOLT2018
GMC ACADIA2018
GMC CANYON2018
GMC SAVANA2018
GMC SIERRA 25002018 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA DENALI2018 (the catalog's model; the bulletin names a series or trim of it)
GMC TERRAIN2018
GMC YUKON2018
GMC YUKON XL2018

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

Recalls for the same vehicles and component
20242942024-05-24. Electrical
20232102023-04-06. Electrical
23V2470002023-04-06. ELECTRICAL SYSTEM:WIRING
20214072021-07-01. Electrical
21V4960002021-07-01. EQUIPMENT:ELECTRICAL:ENGINE BLOCK HEATER
19V6420002019-09-06. ENGINE; ELECTRICAL SYSTEM:SOFTWARE; FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS
20193252019-06-28. Electrical
19V4280002019-06-11. EQUIPMENT
20192042019-04-26. Electrical
18V6550002018-09-21. ELECTRICAL SYSTEM

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
22-NA-0072025-11-15. Service bulletin. This service bulletin provides procedures to correct customer concerns of Poor Engine Performance in Extremely Cold Weather Conditions, Charge Air Cooler (CAC) Icing - Malfunction Indicator Lamp (MIL) Illuminated with DTCs P0299, P0234, P0236, P2227, P00C7 Set.
18-NA-1802025-10-16. Service bulletin. This Warranty Administration service bulletin provides Lithium-Ion battery Exchange Process and Transaction Submission information.
18-NA-1802025-09-26. Service bulletin. This Warranty Administration service bulletin provides Lithium-Ion battery Exchange Process and Transaction Submission information.
18-NA-0692025-05-06. Service bulletin. This service bulletin provides a service procedure to correct conditions of Poor Engine Performance in Extremely cold weather conditions, CAC Icing, MIL Illuminated with DTCs set.
25-NA-0872025-05-02. Service bulletin. This service bulletin provides information on the proper Reflective High Temperature Heat and/or Insulating Tape to use for certain repairs, such as Wiring Harness Repairs.
21-NA-1392025-05-01. Service bulletin. This service bulletin provides a repair procedure to correct a customer concern of a Malfunction Indicator Lamp (MIL) Illuminated - DTC P3055 Set.
13-08-116-001K2025-04-25. Service bulletin. The intent of this service bulletin is to identify aftermarket ALDL or DLC interface devices as potential sources for causing multiple customer concerns that do not have other diagnostic methods to identify them.
24-NA-0982025-04-24. Service bulletin. This service bulletin provides information for dealers/technicians on Service Programming System (SPS) Error Codes E4398, E4399, E4401, E4403, M4404, M4413, M6954, M6955, E4414, E4423, E4491, E4492, or E6961 and resolution information.
23-NA-1652025-04-15. Service bulletin. This service bulletin provides repair information to correct a customer concern of Vehicle Will Not Lock and Unlock (Loss of Active Functions) Crank or Start (Loss of Passive Functions) with DTC P0513 Set.
15-06-03-001F2025-04-15. Service bulletin. This service bulletin provides information to diagnose batteries that have set for a long period of time and/or cold weather climates and testing those batteries.