GMC 4000 Series Service Manual page 49

Sec. 1
Page 42
CONVENTIONAL CAB
Figure 25 — Replacing Door W in d o w Glass Regulator
the window two-thirds closed position.
5. Install vent assembly as directed under
"Door Vent Window Assembly Replacement."
6. Check operation of vent assembly and win­
dow raising and lowering action for possible binding.
DOOR W IN D O W REGULATOR
REPLACEMENT
To replace regulator, it is first necessary to
Figure 2 6 — Installin g W in d o w G lass C han nel Run
G M C S E R V I C E M A N U A L
remove the door window assembly and the vent
window assembly as directed previously under
"Door Window Glass Replacement."
to door inner panel.
moval" procedures in reverse sequence.
REMOVAL (Fig. 26)
dow frame, pry end of channel from door using a
small flat-bladed instrument.
top of door, then upward to remove from side
frame of door.
INSTALLATION (Fig. 26)
to back and sides of run channel.
frame, then force it downward in manner shown in
figure 26. By engaging length of channel required
to butt against vent window frame, the amount of
channel to be inserted downward can be determined.
Use thumbs to p ress channel into position.
ward more readily if the window is rolled up and
down during the p rocess. If run channel cannot be
installed as instructed, it will then be necessary
to remove the door window glass.
properly position run channel so that channel lips
lock behind grooves of window frame.
Figure 2 7 — Removing Glass Horizontal Seals
1. Remove regulator handle.
2. Remove four screws which attach regulator
3. Referring to figure 25, remove regulator.
4. To install regulator, perform the "Re­
DOOR GLASS RUN CHANNEL
REPLACEMENT
1. Roll window to bottom of door.
2. At upper end of channel, next to vent win­
3. Continue to pull channel downward from
1. Apply thin coat of silicone type lubricant
2. Start end of run channel into door side
NOTE: The run channel can be inserted down­
Referring to inset of figure 26, be sure to