Chevrolet HHR (2005 -2011) – bulb specification

Exterior lamp	Bulb number
Back-up Lamp and CHMSL	921
Front Turn Signal and Parking Lamp (Amber)	5702KA
Front Turn Signal and Parking Lamp (Clear)	D2N
Headlamp High/Low-Beam	H13
Stoplamp/Taillamp/Turn Signal	3057KX

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.