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Service bulletin PI-1408E

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 id10190348
Published by NHTSA2021-04-16
Manufacturer's numberPI-1408E
Manufacturer's date2017-10-01
NHTSA componentEQUIPMENT:APPLIANCE:AIR CONDITIONER

NHTSA's summary

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.

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

Equipment and accessories, Heating and air conditioning

Vehicles listed
CADILLAC ATS2013, 2014, 2015, 2016
CADILLAC CTS2014, 2015, 2016

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

Recalls for the same vehicles and component
15V5580002015-09-03. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

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PIE0291A2024-04-08. Service bulletin. Engineering Information.
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PIC59282024-04-08. Service bulletin. product feedback on the new 2014 Cadillac CTS Sedan.