GMC SIERRA CK2 1999 Owner's Manual page 131

Instrument Panel Cupholder
Your vehicle has a cupholder in the middle of the
instrument panel.
To close the cupholder, slide it back into the
instrument panel.
To use the cupholder, pull
the handle and slide the
cupholder tray open.
Center Console Storage Area (If Equipped)
Your vehicle may have a console compartment between
the bucket seats.
To open it, lift the latch handle and swing the door open.
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