Service bulletin GCUS-9-3816

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)
Type	Service bulletin
NHTSA id	10126034
Published by NHTSA	2017-12-22
Manufacturer's number	GCUS-9-3816
Manufacturer's date	2017-03-29
NHTSA component	ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR

NHTSA's summary

15810-01 - Special Coverate (warranty information revised). - On some vehicles, a malfunction-indicator light (MIL) may illuminate due to thermal damage or face erosion of the catalytic converter. Replace the catalytic converter. 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, Exhaust and emissions, Catalytic converter

Vehicles listed
CHEVROLET EQUINOX	2010, 2011
GMC TERRAIN	2010, 2011

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
15810-03	2018-09-10. Service bulletin. 15810-03 - Special Coverage Revised. On some vehicles that are equipped with a 2.4L engine (RPO LAF), a malfunction-indicator light (MIL) may illuminate due to thermal damage or face erosion of the catalytic converter. This special coverage covers the condition described above for a period of 10 years or 120,000 miles (193,000 km), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership. Replace the catalytic converter.
15810 02	2018-08-20. Service bulletin. 15810-02 - Special Coverage (revised warranty section). On some vehicles that are equipped with a 2.4L engine (RPO LAF), a malfunction-indicator light (MIL) may illuminate due to thermal damage or face erosion of the catalytic converter. This special coverage covers the condition described above for a period of 10 years or 120,000 miles (193,000 km), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership. Replace the catalytic converter. The repairs will be made at no charge to the customer.
060601010D	2018-06-04. Service bulletin. This informational bulletin explains how the catalytic converters may need an inspection, cleaning or replacement if debris have entered the exhaust system.
PIP5232A	2018-05-07. Service bulletin. This Preliminary Information communication provides information to the technician about gasoline powered cars, mid-size trucks, light duty trucks, and heavy duty trucks with premature catalytic converter failures. It is recommended to inspect for a poor crimp on the grounds ring terminal at the engine block for the bank with the concern and repair the wire.
PIP5232	2018-05-07. Service bulletin. This Preliminary Information communication provides information to the technician about gasoline powered cars, mid-size trucks, light duty trucks, and heavy duty trucks with premature catalytic converter failures. It is recommended to inspect for a poor crimp on the grounds ring terminal at the engine block for the bank with the concern and repair the wire.
GCUS-9-2602	2017-12-22. Service bulletin. 15810 - Special Coverage. A malfunction-indicator light (MIL) may illuminate due to thermal damage or face erosion of the catalytic converter. Replace the catalytic converter. The repairs will be made at no charge to the customer.
PIP5232B	2017-08-15. Service bulletin. This Preliminary Information communication provides information to the technician about gasoline powered cars, mid-size trucks, light duty trucks, and heavy duty trucks with premature catalytic converter failures. It is recommended to inspect for a poor crimp on the grounds ring terminal at the engine block for the bank with the concern and repair the wire.
PIP5232C	2017-08-15. Service bulletin. This Preliminary Information communication provides information to the technician about gasoline powered cars, mid-size trucks, light duty trucks, and heavy duty trucks with premature catalytic converter failures. It is recommended to inspect for a poor crimp on the coil grounds ring terminal at the engine block for the bank with the concern and repair the wire.
PIP4919B	2017-08-15. Service bulletin. This Preliminary Information communication provides information to the technician about vehicles that may have black smoke on a cold start. A dual-pulse injection strategy is utilized during engine cold start to reduce the time required to bring the catalytic converter up to operating temperature. This split injection strategy lasts for about 60 seconds on cold start. This process may cause the customer to see increased black smoke during cold start and should be considered normal.