2012 Chevy Cruze Reservoir Tank

Cruze reservoir coolant 1pcs chevrolet Cruze under Help me! what is this part under my cruze?

1PCS Coolant Reservoir Expansion Tank for Chevrolet Cruze 2009-2014 | eBay

2011-2016 chevrolet cruze engine coolant overflow reservoir tank, oem Cruze reservoir coolant overflow 1pcs coolant reservoir expansion tank for chevrolet cruze 2009-2014

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1PCS Coolant Reservoir Expansion Tank for Chevrolet Cruze 2009-2014 | eBay

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Help me! What is this part under my Cruze? | Chevrolet Cruze Forums

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2011-2016 Chevrolet Cruze Engine Coolant Overflow Reservoir Tank, OEM