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Service bulletin N182186881

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 id10207710
Published by NHTSA2022-02-07
Manufacturer's numberN182186881
Manufacturer's date2018-12-04
NHTSA componentEQUIPMENT:APPLIANCE:AIR CONDITIONER; ENGINE AND ENGINE COOLING; ENGINE

NHTSA's summary

Special Coverage. On some vehicles, the evaporator core may become damaged as a result of repeated freeze/thaw cycles without proper drainage of the condensate from the core. A damaged evaporator core may leak refrigerant and result in a loss of air conditioning function. Dealers are to confirm the air conditioning system evaporator core is the source of the refrigerant leak, and replace the core if its sealing is compromised. The repairs will be made at no charge to the customer.

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

Engine, Equipment and accessories, Heating and air conditioning

Vehicles listed
CHEVROLET IMPALA2016, 2017, 2018

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

Other bulletins for the same vehicles and component
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25-NA-1002025-06-12. Service bulletin. This warranty administration bulletin provides policy information on vehicles outside of a California Emissions State who move to and register their vehicle in a California Emission State may be entitled to the 7 year, 70,000-mile Emission Select State Component Limited Warranty.
25-NA-0522025-04-28. Service bulletin. This bulletin advises the technician to flush the cooling system multiple times if oil has been found in the cooling system and replace the parts that may be contaminated due to oil in system.
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09-06-04-026Z2025-01-23. Service bulletin. This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
19-NA-2192024-12-17. Service bulletin. This diagnostic tip bulletin provides additional information on how to diagnose a possible valve, lifter or camshaft issue.