81'-86' Air Cleaners

[VPC20HD]

Hello,

I have a 1982 C20 HD and I'm missing the original Air Cleaner. My dad was the first owner and bought the C20 in California and after doing some research, I believe there was an emission label on the Air Cleaner with a CNU emission code label. My C20 is "M code" which means it has a LT9 engine for HD pick ups. My questions is, Can I put on any Air Cleaner that was on a LT9 or LS9 engine from 81-86 or Do I have to find an Air Cleaner that was just for the LT9 engine like the one I have.

Any info would be appreciated, Thank You.

 

[CalSgt]

Most likely any stock air cleaner from the era will pass visual inspection.

post a picture of what you’re working with

 

[CalSgt]

Here’s the HD one I ran on my truck forever

You must be registered for see images attach

 

[fast 99]

Will caution you, if the vehicle has a 4 port TVS on top of the thermostat housing it will need the smaller diameter air cleaner pictured above. Ask me how I know.

 

[VPC20HD]

Under my hood...

 

[VPC20HD]

I mean do all Heavy Duty C20s and K20s from 1981-1986 have the same Air Clearers with different emission labels on them depending if the truck was sold in California or not, or are the Air Cleaners different based on what engine came on?

forgive my ignorance...

 

[fast 99]

I mean do all Heavy Duty C20s and K20s from 1981-1986 have the same Air Clearers with different emission labels on them depending if the truck was sold in California or not, or are they different based on what engine came on?

forgive my ignorance...

My 81 K20 is same as top one pictured, 85 K20 has one like you posted, both 350's. They were originally non-floater, so lighter duty. Can't answer the question directly but would guess GVW, year, California emissions, dual or single tank might all play into what was installed.

 

[AuroraGirl]

I mean do all Heavy Duty C20s and K20s from 1981-1986 have the same Air Clearers with different emission labels on them depending if the truck was sold in California or not, or are they different based on what engine came on?

forgive my ignorance...

heavy duty is another word for leaded gasoline, so less smog equipment

 

[Shorty81]

Welcome from Ohio. That's a good looking truck.

 

[David King]

Welcome from Florida Panhandle!

 

[Craig Nedrow]

1973 454

 

[Finkaire]

‘84 C10 California

 

[JGN62]

Hi, I am new to this forum. I have a 1982 Chevy G20 vans with a 350. I discovered the hard way that you want an air cleaner that has a blue/grey coloured ring which appears to be a carbon filled device which is permanently sealed into the air cleaner base. I removed mine as I thought this was a restriction to air flow (which it is) I soon discovered a problem though. My gas tank began to crumple as the vacuum from the fuel pump on a sealed system was not allowed to equalize. I replaced all kinds of things including the vapour canister and still had the problem until I realized that the grey restrictor ring that was originally in the air cleaner was there to provide a small area that was not under vacuum. This was how GM/Chevy had their system set up to be compliant to hydro carbons being contained. So if your vehicle is California compliant you may want to make sure the air cleaner you look for has this intact.
Glenn

 

[Strick]

Welcome in from the Tarheel State.

HS

 

[JGN62]

Thank you Sir