Valve Springs Can Be Tightly Compressed Warning
WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
Valve springs can be tightly compressed. Use care when removing retainers and plugs. Personal injury could result.