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#1 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Did trucks ever had AIR?
I just found out my 1969 427/390 car should have had an AIR pump, and a little research turns up that in cars, ALL big blocks had AIR injection in 1969. I don't know about Corvette.
Our trucks didn't, did they? My 1970 showed no signs of it. How hard will it be to find a complete big block AIR system? I'd imagine thousands were taken off, but how many were saved I don't know.
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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#2 |
Registered User
Join Date: Nov 2014
Location: Lincoln City DE
Posts: 1,292
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Re: Did trucks ever had AIR?
First thing that got chunked ,,,, should be on ebay
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Stan 67 swb BLU MULE posted via flip-fone |
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#3 |
Roadtrip!
![]() Join Date: Feb 2003
Location: Grand Rapids MN
Posts: 13,736
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Re: Did trucks ever had AIR?
Hard to find complete.
This is from a 72 1/2 ton burb
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67 gmc custom lwb dakota truck. Sold...And bought back 69 swb 4x4 project (in progress) 70 c-10 lwb texas truck 70 4x4/BB/bkts/posi/tach(retired) 70 swb (wifes) 70 jimmy camper 71 K-5 factory 2wd 71 cheyenne 4x4/tach/posi/ plow rig 71 Cheyenne20 BB, buckets, tach, tilt, 4 speed 72 jimmy CST wyoming rig 72 jimmy Colorado rig 72 lifted texas 4x4 3/4 ton burb 65 fury conv. 383/auto 65 chrysler 300 "L" 413 auto |
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#4 |
Senior Member
![]() Join Date: May 2010
Location: Wisconsin & Arizona
Posts: 4,844
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Re: Did trucks ever had AIR?
I think you'll find it may vary depending on year and whether the truck is a 1/2 ton or 3/4 ton (GVWR?) as well as small block or big block.
I've watched several threads regarding smog equipment, and the lines seem to get blurred as posts are added without info regarding year and GVWR. Point of sale and/or manufacture may also be a factor. |
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#5 |
Senior Member
![]() Join Date: Dec 2006
Location: Studio City, Calif.
Posts: 2,873
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Re: Did trucks ever had AIR?
Even in California the 1/2 tons needed AIR, I know because I had to buy the whole shebang ($15) to get my '69 GMC (350 ci, manual trans) to pass smog check 20-some years ago. My current 1969 2500 (7500 LB weight Limit) never had AIR or any other smog equipment except PVC. Both California trucks. -BA
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'69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, stereo speakers, 2nd owner, Work-Truck supreme. |
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#6 |
Senior Member
![]() Join Date: May 2010
Location: Wisconsin & Arizona
Posts: 4,844
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Re: Did trucks ever had AIR?
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#7 |
Who Changed This?
![]() Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,418
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Re: Did trucks ever had AIR?
Yes. It depends on year and delivery location. In general, a vehicle in the years affected (starting in '68), California and some other states' vehicles and again, depending on application, had AIR. It is used to pump air into the exhaust to further combust the unused fuel in the exhaust, when on the choke (cold). If you have exhaust manifolds without 1/4" straight pipe plugs, it is likely a Federal Emissions vehicle. The tubes were 5/16", so should have B-nut plugs if the equipment was removed, but people just ground in the pipe fittings, in my experience. That is how the distinction was made- California SMOG, or Federal. I worked as a SMOG mechanic in those days. I might be hazy on some details here, but I'm pretty sure this is correct. I have seen trucks in Idaho, when I worked there as a mechanic, that had AIR.
With the advent of catalytic converters, the whole California/Federal business went by the wayside. My truck has Federal emissions equipment, thus no AIR. ETA- yes, I believe only 1/2T trucks got AIR, as has been mentioned. So maybe my truck didn't have to be a Federal equipment unit, but the emissions sticker is for a non-California vehicle. Just to clarify.
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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