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Service bulletins for the 2015 Cadillac ATS

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.

1777 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Heating and air conditioning are shown. Show all

Bulletins, newest first
16NA0082024-02-12. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM; VISIBILITY. Subject: Auto-On Rear Window Defogger and Outside Rear View Mirror (OSRVM) Defogger Not operating
PIT5099G2023-12-26. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This Preliminary Information communication provides information to the technician about vehicles that the Heater-Vent-Air Conditioning blows warm air. Before calling General Motors Technical Assistance Center technician will need to have high and low pressures, outside temperature, humidity, and vent temperature.
PIT5099A2023-12-11. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. A/C Blows Warm Or Poor Performance.
PIP5540J2023-01-30. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:REAR WINDOW:ELECTRICAL HEATING ELEMENT. This Preliminary information communicates to the technician the need to inspect the induction system for potential icing issues in very cold ambient temperatures. To allow the ice to melt so that it can be drained from the related components. That any of the listed DTC's may set with or without poor engine performance.
PIT5099F2022-07-25. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This Preliminary Information communication provides information to the technician about vehicles that the Heater-Vent-Air Conditioning blows warm air. Before calling General Motors Technical Assistance Center technician will need to have high and low pressures, outside temperature, humidity, and vent temperature.
12-01-37-001F2022-07-12. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This service bulletin provides information to dealership personnel on a new refrigerant (R1234yf) for A/C service.
PI-1408E2021-04-16. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. Musty Odor from HVAC Vents on Startup Condition/Concern Some customers may comment on a musty or mildew odor coming from the HVAC instrument panel air outlet vents on startup. The odor most likely will dissipate after 30-60 seconds of operation. The odor generally occurs after the vehicle has been parked for 2–6 hours with sun load with temperatures of 21°C (70°F) or higher. This may be caused by condensation building up on the evaporator core, which does not evaporate by itself in humid conditions. The odor may be the result of microbial growth on the evaporator core being released into the air stream by the HVAC blower motor.
PIT5099E2020-08-10. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This Preliminary Information communication provides information to the technician about vehicles that the Heater-Vent-Air Conditioning blows warm air. Before calling General Motors Technical Assistance Center technician will need to have high and low pressures, outside temperature, humidity, and vent temperature.
PIT5099D2018-11-13. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. This Preliminary Information communication provides information to the technician about vehicles that the Heater-Vent-Air Conditioning blows warm air. Before calling General Motors Technical Assistance Center technician will need to have high and low pressures, outside temperature, humidity, and vent temperature.
PIC5979A2018-10-15. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. This Preliminary Information communication provides information to the technician about vehicles that have the Heater-Vent-Air Conditioning system discharge temperature to vary from side to side when the set temperature is set to the same value. Dealer should communicate to the customer this condition is a normal operating characteristic of their vehicle.
PIT5099C2018-08-06. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. This Preliminary Information communication provides information to the technician about vehicles that the Heater-Vent-Air Conditioning blows warm air. Before calling General Motors Technical Assistance Center technician will need to have high and low pressures, outside temperature, humidity, and vent temperature.
99-01-39-004F2018-06-11. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. This technical bulletin provides a procedure to correct the customers concern of odor coming from the Air conditioning.
PIC60792018-06-04. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:REAR WINDOW; STEERING; SEATS:FRONT ASSEMBLY:SEAT HEATER/COOLER; EQUIPMENT:APPLIANCE:AIR CONDITIONER. This Preliminary Information communication provides information to the technician about vehicles with remote start and the changes during a Remote Vehicle Start event as of the 2015 model year. The following functions have changed for 2015 Dual Zone Auto HVAC settings, Rear window defogger, heated seats, ventilated seats, and heated steering wheel. On transition to ignition the following Remote Vehicle Start event, the Heater-Vent-Air Conditioning settings will return to last known settings. During a remote start event, the rear window defogger will turn on if the outside temperature is 44 Fahrenheit (7 Celsius) or below. During a Remote Vehicle Start event, the heated seats will turn to the high setting when the ambient temperature is below 50 Fahrenheit (10 Celsius). During a Remote Vehicle Start event, the ventilated seats will turn to the high setting when the ambient temperature is above 80 Fahrenheit (27 Celsius). During a Remote Vehicle Start event, the heated steering wheel does not turn on.
PIT53832018-06-04. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER; EQUIPMENT. This Preliminary Information communication provides information to the technician about vehicles with various Heater-Vent-Air Conditioning concerns. Technician will need to reprogram HVAC Control Module with the updated calibration available in TIS2WEB starting on 1/17/2015.
99-01-39-004F2018-05-29. Service bulletin. EQUIPMENT; EQUIPMENT:APPLIANCE:AIR CONDITIONER; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This technical bulletin provides a procedure to correct the customers concern of odor coming from the Air conditioning.
PI1408A2018-05-21. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. This preliminary informational bulletin provides repair information to correct a customer concern of musty odor from HVAC vents on startup.
99-01-39-004F2018-05-21. Service bulletin. EQUIPMENT; EQUIPMENT:APPLIANCE:AIR CONDITIONER. This technical bulletin provides a procedure to correct the customers concern of odor coming from the Air conditioning.
PI1408B2018-05-21. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. This preliminary informational bulletin provides repair information to correct a customer concern of musty odor from HVAC vents on startup.
PI14402018-05-07. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. This preliminary informational bulletin provides technicians with diagnostic tips for a customer concern of odor emanating from HVAC system.
PIT5099A2018-05-07. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. This Preliminary Information communication provides information to the technician about vehicles that the Heater-Vent-Air Conditioning blows warm air. Before calling General Motors Technical Assistance Center technician will need to have high and low pressures, outside temperature, humidity, and vent temperature.
PI1408E2018-04-23. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. This PI provides a procedure to install an ionizer kit to reduce a musty odor condition.
PIT5383B2018-01-22. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. This Preliminary Information communication provides information to the technician about vehicles that have various Heater-Vent-Air Conditioning issues. Technician should use Tis2Web to reprogram the Heater-Vent-Air Conditioning control module.
030848006J2017-12-22. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This informational bulletin provide information for the technicians to repair the rear window defroster contact or tabs.
PIP53002017-08-15. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER; ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that engine overheating, and/or poor heater performance, AC off message, and Malfunction Indicator Lamp illumination. Technician will find Diagnostic Trouble Code P00B7 and/or P2181. Technician will gain access to the water outlet assembly and inspect for flashing or debris. If flashing or debris found in the water outlet assembly it will need to be replaced. Also inspect the upper heater core hose and coolant bypass pipe at the water outlet for a black plug. If plug is found, remove and discard.
PI14402017-08-15. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. This preliminary informational bulletin provides technicians with diagnostic tips for a customer concern of odor emanating from HVAC system.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.