I understand that GMCs are a bit quirky and haver a few differences compared to the Chevys, but was it common for AD GMC trucks to have both the top and drivers side cowl vent? I don't believe I have ever seen it on a Chevy, but I saw two different Jimmys in the same day that have both drivers side vent as well as on top of the cowl. Any info on this?
I’m a little confused by some of the wording, as I’m not totally familiar with terms, but my ‘57 Chevy 3200 has passenger and driver side floor vents that get fresh air fed in through the cowl between hood and windshield.
1957 Chevy 3200 Daily Driver PS, A/C, Tilt column, Rebuilt 350, Rebuilt TH350, Reupholstered Bench Seat, sound proof/insulated, LED headlights/taillights/backup lights/interior courtesy lights. Follow in the DITY
I believe all AD's had the top cowl vent under the windshield. But the driver's side cowl vent only went thru '50 models.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
The earlier Advance Design (AD trucks from 47-54 had cowl vents to let fresh air in. From 47-50 this vent was on the drivers side just in front of the door. 51-54 they moved that vent to the top of the cowl just in front of the windshield, behind the hood. I just happened to see two GMC trucks that have both! I didn't think that even existed. I have never seen it before much less two trucks that have both vents in the same day.
I believe all AD's had the top cowl vent under the windshield. But the driver's side cowl vent only went thru '50 models.
Maybe that is it. I am probably just confused. for some reason I thought there was always a single vent, either side or top mount. For some reason I thought the 40s models only had the side vent
But to sum up, ALL AD truck cabs have the top cowl vent (in front of the windshield). All '47 through '50 have the driver's side side cowl vent. In '51, its function was taken over by the vent windows (in the door).
As far as I know, the GMC cabs follow the same evolution.
~ John
"We are not now that strength which in old days Moved earth and heaven; that which we are, we are"
1948 International Farmall Super A 1949 Chevrolet 3804 In the Legacy Gallery | In the Gallery Forum 1973 IH 1310 Dump 2001 International/AmTran RE3000 "Skoolie" 2014 Ford E-350 4x4 (Quigley)
After reading what John suggested I wonder if on my 54 I could have mounted an earlier fuel tank under the bed. I have an after market under the rear of the truck and dependeniing how much fuels is in it changes the ride. But having it closer to the center it might have been better.
Ron, The Computer Greek I love therefore I am. 1954 3100 Chevy truck In the Gallery 2017 Buick Encore See more pix 1960 MGA Roadster Sold 7/18/2017
Yes, my '50 has both the top cowl vent and driver's side vent in front of the door.
Craig
My '50 Chevy 3100 5 window, '62-235cu, 3:55 rear My truck ....... Respect The Rust If I'm not working on my truck, '65 m00stang or VW camper, I'm fishing with the wife or smoking Salmon.
My 49 gmc 150 has the cowl vent and the drivers flip out vent. The fins are stamped into the pass side for the fresh air heater but its got the blank out plate on it since I run the small recirc heater.
Right hand drive? Or a really old custom job? That might actually be 3 vents, but can't see the top of the cowl.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
Dads50 -- wow, that's REALLY interesting! It just goes to show you ... It would be interesting to hear from our So. Africa or Aussie guys to see if that's something they've seen also.
~ John
"We are not now that strength which in old days Moved earth and heaven; that which we are, we are"
1948 International Farmall Super A 1949 Chevrolet 3804 In the Legacy Gallery | In the Gallery Forum 1973 IH 1310 Dump 2001 International/AmTran RE3000 "Skoolie" 2014 Ford E-350 4x4 (Quigley)
Makes sense that they'd put an operable side vent on the right side of a RHD truck. It'd be a PITA to have to reach all the way across the cab to the left side to open the vent there. Now, how they'd install a fresh air heater, is the question. Any idea if those were made mirror image to the American ones, so they'd fit on the left side?
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
