GMC T-Series 1999, Owner'S Manual, Page: 69 / 344

yellow blue
2-33
Windows
The window controls are on
each door.
The driver’s door has a switch for the passenger’s
window and a LOCK button as well. When the LOCK
button has been pushed down, the passenger’s side
window will not operate with either window control
switch. Push LOCK again to return the passenger’s side
power window to normal operation. The lock button
does not affect driver’s side power window operation.
Your power windows will not move unless the ignition
switch has been turned to ON.
Push the power window switch down part way to lower
the windows. Pull the switch up part way to raise them.
The power windows can be operated for up to 30 seconds
after the ignition switch has been turned to LOCK.
Passenger Side Door Glass
The passenger’s side door window opens to allow the
inner glass to be cleaned.
To open this window, pull out on the latch at the rear of
the window and swing the window open. When closing
the window, push firmly at the latch to close completely.