2009 GMC Sierra 1500 Crew Cab Owner's Manual - Page 16

2009 GMC Sierra 1500 Crew Cab Manual

Page 16 highlights

Reclining Seatbacks { CAUTION: { CAUTION: You can lose control of the vehicle if you try to adjust a manual driver's seat while the vehicle is moving. The sudden movement could startle and confuse you, or make you push a pedal when you do not want to. Adjust the driver's seat only when the vehicle is not moving. If either seatback is not locked, it could move forward in a sudden stop or crash. That could cause injury to the person sitting there. Always push and pull on the seatbacks to be sure they are locked. 1-10

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