'71 Owners
 

In another thread discussing cab differences something interested came out about '71 cabs. Some have the driver side door jamb vent that all '72s have and some don't. Things like this raise my curiosity and now I'm wondering what the rhyme or reason is to this ...if there is any. Was it late in the year? Air conditioned trucks? Only blue ones? (J/K)

After you vote yay or nay,please post what you know about your truck. Does it have the vent,A/C or not,or if you know,was it earlier in the model run or later. If you have any other info you feel could have an effect on this,please spout it out...thanks!

Re: '71 Owners
 

Mines an early run pretty basic w/o the vent.

Re: '71 Owners
 

I didn't know how to account for having more than one in the pol. My experience has been no '71 with the vent. I realize some maybe did,but I never took notice,didn't care at the time,or just don't recall. But,none lately including a non-air K/10 SWB Custom Deluxe I just sold and my Custom/30 tow truck.

Re: '71 Owners
 

I have factory AC in mine...now removed. I always wondered what that vent was for, being near the gas I thought it maybe a way of making sure there was permanent air flow in the cab??

Re: '71 Owners
 

'71 Non-AC, no vent.

Not sure of production date.

Re: '71 Owners
 

Mine has a vent and its blue with a/c.

If anyone has a question about the actual year of the cab, 71 is the only year with a raised pad on the inner roof for the rear view mirror.

Re: '71 Owners
 

My '71 has the vent, although I'm not 100% sure it's the original cab. It's a 1/2 ton swb 350/350, a/c, ps, pb truck but we found evidence of cab lights at one point.

Re: '71 Owners
 

My early 71 factory a/c gmc doesn't have one
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Re: '71 Owners
 

That '71 K/10 I mentioned was sold in January,so not real early and not real late. Oh,BTW,it's blue :lol:

Re: '71 Owners
 

The wife's 71 C10 has the vent. non AC, dark olive and white, do not know production date

Re: '71 Owners
 

Mine has the vent as well.. 307, 3ottt, no A/C, long bed in blue.

Re: '71 Owners
 

Don't laugh to hard but, I heard once the vent was so the doors would close without having to slam them. releasing pressure at the seal&latch. could be way off so be gentle! cheers, Pat

Re: '71 Owners
 

Mine has the vents in the door jam. Not sure what they are for .

Re: '71 Owners
 

That's what I have heard too...
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Re: '71 Owners
 

has vent no ac man trans 3 on the tree

Re: '71 Owners
 

'71 K10 GMC w/o A/C. Does have the vent. Not sure of production sequence. Maybe some assembly plants used the 'newer' cab with the vent?
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Re: '71 Owners
 

71 3 on the 3 bottom of the barrel power nothing no a/c



but it has a vent :lol:

Re: '71 Owners
 

No vent. Build sheet says 9-14-70

Re: '71 Owners
 

orig cab med olive and white top with vent no a/c orig arizona truck

Re: '71 Owners
 

Good point posted above about the plant it was made at. Mine doesn't have a vent and was made in St Louis.
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Re: '71 Owners
 

NO. No Ac, Cal plant, build date unk.

Re: '71 Owners
 

Built in Baltimore BTW..

Re: '71 Owners
 

My 71 C20 has the door jamb vent, air conditioning,AT,cheyenne, built in Janesville

Re: '71 Owners
 

Mine has the vent. Non a/c. Do know the production date.

Re: '71 Owners
 

I could believe that Pat, the only thing is that when I installed new door weather stripping my doors became hard to shut as is expected, but with the vent window open a little they shut real easy....which would mean my door jam vent isn't doing that job.