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2014 - 2015 Corvette and Z06: Additional Required Maintenance

To: Chevrolet, Buick, GMC, and Cadillac Dealers

2014/2015 Z51 and Z06 Corvettes – Additional Required Maintenance

The following message only applies to dry sump Corvettes that have not had their first oil change performed.

Some 2014/2015 Z51 and Z06 Corvettes may experience a condition that leads to oil leaking out from the air cleaner assembly. This
condition may be caused by running the engine continuously at a high engine speed with the first factory fill oil, resulting in silicone
sealants in the engine’s gaskets degrading the oil’s anti-foaming agents. The oil foam has no effect on the engine’s durability.

Effective Immediately:
GM is changing the required maintenance schedule for all 2014/2015 Z51 and Z06 Corvettes equipped with dry sump systems. The new
schedule will require the oil/filter be changed immediately after the break-in period, which occurs after the first 500 miles of operation.
Once the break-in oil change is performed and the Oil Life Monitoring system is reset, customers should follow the Oil Life Monitoring
system for all future oil change needs.

The 2nd printing of the 2015 Owner Manuals is being updated with this change. These manuals will not be in the glove box material until
January 2015. For vehicles produced before this change, and for all vehicles going forward, it is important to notify the customers that a
change has been made, and they will need to have the vehicle’s oil changed after the break-in period. Copies of the new maintenance
grid will be available on GMPROGRAMINFO.com, under Chevrolet, Resources.

As you are aware, all 2014/2015 Corvettes come with Chevrolet Complete Care which covers 2 years/24,000 miles of select required
maintenance. Previously, up to 4 service events were allowed under the program guidelines in the 2-year/24,000-mile period. With the
change in the maintenance schedule being effective immediately, an additional oil change allowance will be added to 2014/2015 Z51
and Z06 Corvettes, increasing the amount of coverage to 2 years/24,000 miles, up to 5 service events.

Please make sure all dealership personnel are aware of this change.

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