GMC YUKON DENALI 2000 - Reclining Front Seatbacks

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Reclining Front Seatbacks
To adjust the seatback,
move the lever rearward.
Release the lever to lock the seatback where you want it.
Move the lever again rearward and the seatback will go
to an upright position.
But don’t have a seatback reclined if your vehicle
is moving.