# Service bulletin 23\-NA\-221

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: 10247594
- Published by NHTSA: 2023\-12\-22
- Manufacturer's number: 23\-NA\-221
- Manufacturer's date: 2023\-12\-15
- NHTSA component: ELECTRICAL SYSTEM; EQUIPMENT; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM

## NHTSA's summary

This technical bulletin provides a procedure for Sun Load, Ambient Light, and Charge Indicator Sensor Replacement to correct a customer concern of A/C Inoperative or A/C blows warm to hot air.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10247594-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10247594-9999.pdf)

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

## Components

Electrical system, Equipment and accessories, Glass, wipers and mirrors, Heating and air conditioning

## Vehicles listed

- 2023 to 2024 CADILLAC LYRIQ
- 2024 CADILLAC redundant LYRIQ
- 2024 CHEVROLET BLAZER EV
- 2024 CHEVROLET EQUINOX EV

## Recalls for the same vehicles and component

- [2026059](/recalls/tc/2026059.md), 2026-02-12: Visual System
- [25V356000](/recalls/nhtsa/25V356000.md), 2025-05-29: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; EQUIPMENT:ELECTRICAL:INFOTAINMENT:VIDEO \(TOUCH\)SCREEN/MONITOR/UNIT
- [24V320000](/recalls/nhtsa/24V320000.md), 2024-05-09: ELECTRICAL SYSTEM:PROPULSION SYSTEM; ELECTRICAL SYSTEM:WIRING
- [23V682000](/recalls/nhtsa/23V682000.md), 2023-10-12: ELECTRICAL SYSTEM:BODY CONTROL MODULE:SOFTWARE
- [23V367000](/recalls/nhtsa/23V367000.md), 2023-05-25: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY

## Other bulletins for the same vehicles and component

- [N242468490\-02](/bulletins/11032963.md), 2026-05-28, Service campaign: ELECTRICAL SYSTEM. Certain vehicles may have missing cavity plugs from the rear chassis harness electrical connector. Dealers are to inspect the rear chassis harness and replace missing harness plugs as necessary.
- [PIE0829A](/bulletins/11030339.md), 2026-03-31, Service bulletin: ELECTRICAL SYSTEM; STRUCTURE:BODY. This engineering information \(EI\) closure ends the need for gathering further information from technicians in regard to the liftgate not opening and/or partially opening.
- [25\-NA\-061](/bulletins/11025554.md), 2025-11-15, Service bulletin: ELECTRICAL SYSTEM; STRUCTURE:BODY. This technical bulletin provides a procedure to correct the condition of Driver or Passenger Rear Door Handle Will Not Fold In.
- [25\-NA\-126](/bulletins/11024941.md), 2025-11-05, Service bulletin: ELECTRICAL SYSTEM. This service bulletin provides information on the wireless charging feature not working or intermittently working, with the replacement of the Wireless Charging Module.
- [25\-NA\-119](/bulletins/11024500.md), 2025-10-27, Service bulletin: AIR BAGS; ELECTRICAL SYSTEM. This service bulletin provides information on the Service Safety Restraint Message displayed on the DIC Airbag malfunction indicator illuminated.
- [25\-NA\-044](/bulletins/11024498.md), 2025-10-27, Service bulletin: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. This service bulletin provides information for dealers/technicians on SPS2 Hybrid/EV Battery Data Retrieval for Service High Voltage DTCs.
- [24\-NA\-202](/bulletins/11024496.md), 2025-10-27, Service bulletin: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. This service bulletin provides dealers with Warranty Administration information on North American Charging Standard \(NACS\) DC Adapter Warranty Claim Information.
- [18\-NA\-180](/bulletins/11024324.md), 2025-10-16, Service bulletin: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. This Warranty Administration service bulletin provides Lithium\-Ion battery Exchange Process and Transaction Submission information.
- [23\-NA\-151](/bulletins/11023484.md), 2025-10-02, Service bulletin: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. This service bulletin and criteria within are to determine the internal state of the High Voltage Battery and core return shipping method.
- [PIE0753I](/bulletins/11023388.md), 2025-09-30, Service bulletin: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. This engineering information \(EI\) will assist GM to recover a small number of electric vehicle battery packs from customer\-owned vehicles in the field for further engineering study and analysis.

JSON: [/v1/bulletins/10247594](/v1/bulletins/10247594)

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