The Stovebolt Site Forums The Shop Area Paint and Body Shop What are these holes for?

Access holes for fasteners????

I'd think the first ones are for rubber bumpers, the 2nd set may be to hold something inside the door like the rear section of window channel

Bill

The holes in the cab at the top of the door opening are for lifting the cab on the assembly line.

if those holes are from assembly then there should be some kind of plug in them from the factory

Bill

I think the two in the door are for the track extension for the side window. The ones in the upper track of the cab above the door, I think are vent holes. I think Tim had a picture that explained the cab ventilation system. Maybe he will dig it out and post a link to it.

I think you're right Greg,after all the AD cab was marketed as "The cab that breathes".
I thought the holes on the rear edge of the door were for the glasss channel too,although they're in a slightly different location to the earlier pre-51 doors on mine.

The two holes in the door are for screws that go into the bracket on the glass-run guide-channel (Factory Assembly Manual, Sheet 1, Section 22). There was a lock clip that ran between the two screws, and with bend-up lock-tabs on the lock clip.

I just now looked at that page in the FAM - I took those lock clips off my Suburban during restoration. The lock clip was not painted - it was raw/galvanized, so it looked like it did not belong there. Oh well, another day, another tidbit learned - thanks you all for pursuing this question/discussion.

Regarding the two holes above the door in the cab. They were not plugged in any of my vehicles (two of which had original cab windlace and original cardboard roof panels (undisturbed, in other words).

I dimly recall someone posting here a factory assembly photo showing the cab being held/lifted/lowered/installed onto the frame by an overhead assembly-line jig/hanger that used those hole above both door openings. And, as Greg noted above, I dimly recall finding a GM illustration of those holes not being plugged - they were described as being part of air-flow in the cab? I will continue looking for that information/illustration.

Here is the assembly line photo - it looks like those holes above the door are being used (that link was found in a post listed below)?

Here is an earlier post about those holes in the cab, above the doors.

Here is an earlier discussion.

None of this gives information about the holes being plugged or being unplugged as everyone has found them to be. Without documentation, I vote unplugged.

I'm wondering if the marketing ploy of "the cab that breathes" was to address the deafening sound inside the cab from all the air leaks in these trucks. I'm not complaining about all the noise, sounds like sweet music to me!

....and it was with interest in the first link Tim posted that there was a note saying..."cab is mounted after the chassis is painted". This was on the GMC.

...Tim, as always, thanks for your dedication.