What year did emissions come standard? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

*SMiller* · 01-28-2010, 10:29 PM

I am looking at a '85 C20 and K30 and was wondering if it will have all the emissions stuff on it. What year did GM start adding all the stuff? Thanks!

jared87350 · 01-28-2010, 10:31 PM

i think it was 72

95 S_Trucker · 01-28-2010, 10:42 PM

certain stuff came out out at different times, my 85 k10 pretty much had every emission device imaginable on it

catalytic converter
AIR pump
Evap emissions control
EGR
Heat riser

yours being a k30 with a higher GVW means it was in a different tier for emissions. Does your truck still have the sticker on the core support?

sdime95 · 01-28-2010, 11:45 PM

i know 75 is when cats were manditory not to sure about the other stuff my 84 has a butt load of emissions equp.

willett · 01-29-2010, 12:04 AM

'73 was the year that it all turned to crap.

except that is for chevy trucks that is..... thats when they started to get good.....

clinebarger · 01-29-2010, 12:17 AM

It varies greatly, My 85 C20 suburban had a 350 with 2 smog pumps duel exhaust with no catalytic converters.

*78 Chevyrado* · 01-29-2010, 12:19 AM

I'm not sure when 1/2 tons got cats, 75 or 76 I think. as for 3/4 tons, they didn't get cats, etc until 79. up to 78 everything with a GVW over 6001lbs. was emissions exempt. 79 and later, you had to have a GVW of 8501lbs to be exempt. Basically that leaves dually's and their 10000lbs GVW exempt but I don't know when that ended.

mosthatedk5 · 01-29-2010, 02:14 AM

idk cuz i had a 78 chevy and i was emmisions exempt... they just did my safety and thats it... i have and 81 blazer now which i think is the same way...

andrewmp6 · 01-29-2010, 03:11 AM

It depends your state mine don't start testing tell 86 some like utah is 67 tell now on cars.

d!nk76 · 01-29-2010, 03:32 AM

California is '75 and Up I believe

spinem · 01-29-2010, 05:55 AM

73 is when they put their foot in the dorr with vacc sensors.

74 (my truck) has the air pump /w/ the exhaust pick up off of the collectors, not the header-tubes. so accuracy, 74 was official.

ToughBowtieTruck · 01-29-2010, 10:11 AM

I know for a fact my '77 3/4 ton, 6300 gvw had no cats factory, just the PCV system. No vapor canister, no A.I.R. pump, nothing. My uncle bought it new and it was titled as the weight of 4483. (commercial pickup truck).

Jim85IROC · 01-29-2010, 11:38 AM

Dunno about 1/2 and 3/4 ton trucks, but 1-ton trucks didn't get cats until 87. The 1/2 and probably 3/4 had cats long before then.

Silence86 · 01-29-2010, 11:38 AM

i wanna say 86 here in texas they had to put mine as an 85 cause i didnt meet standards.. i was a year off

01-28-2010, 10:29 PM	#1
SMiller Account Suspended Join Date: Jun 2009 Location: Tipton IN Posts: 81	What year did emissions come standard? I am looking at a '85 C20 and K30 and was wondering if it will have all the emissions stuff on it. What year did GM start adding all the stuff? Thanks! Last edited by SMiller; 01-28-2010 at 10:39 PM.

01-28-2010, 10:31 PM	#2
jared87350 Registered User Join Date: Sep 2009 Location: ontario, CA Posts: 86	Re: What year did emissions come standard? i think it was 72

01-28-2010, 10:42 PM	#3
95 S_Trucker Registered User Join Date: Oct 2009 Location: . Posts: 2,178	Re: What year did emissions come standard? certain stuff came out out at different times, my 85 k10 pretty much had every emission device imaginable on it catalytic converter AIR pump Evap emissions control EGR Heat riser yours being a k30 with a higher GVW means it was in a different tier for emissions. Does your truck still have the sticker on the core support? Last edited by 95 S_Trucker; 01-28-2010 at 11:47 PM.

01-28-2010, 11:45 PM	#4
sdime95 Registered User Join Date: Sep 2009 Location: Littleton, CO Posts: 33	Re: What year did emissions come standard? i know 75 is when cats were manditory not to sure about the other stuff my 84 has a butt load of emissions equp. __________________ 1984 Sierra 1/2 ton 4x4 swb 1987 Silverado 2wd swb 3/4 drop

01-29-2010, 12:04 AM	#5
willett Another Day, Another Dollar Join Date: Nov 2008 Location: North Vancouver, BC Posts: 1,316	Re: What year did emissions come standard? '73 was the year that it all turned to crap. except that is for chevy trucks that is..... thats when they started to get good..... __________________ -78 K20 Cheyenne 454 long box, 4" lift, 35" MT's, '84 cab, '80 box "its hip to be square"

01-29-2010, 12:17 AM	#6
clinebarger Senior Member Join Date: May 2009 Location: Fort Worth, TX Posts: 6,370	Re: What year did emissions come standard? It varies greatly, My 85 C20 suburban had a 350 with 2 smog pumps duel exhaust with no catalytic converters.

01-29-2010, 12:19 AM	#7
78 Chevyrado Account Suspended Join Date: Dec 2007 Location: Unnapreciative, Trollville Posts: 2,079	Re: What year did emissions come standard? I'm not sure when 1/2 tons got cats, 75 or 76 I think. as for 3/4 tons, they didn't get cats, etc until 79. up to 78 everything with a GVW over 6001lbs. was emissions exempt. 79 and later, you had to have a GVW of 8501lbs to be exempt. Basically that leaves dually's and their 10000lbs GVW exempt but I don't know when that ended. Last edited by 78 Chevyrado; 01-29-2010 at 12:19 AM.

01-29-2010, 02:14 AM	#8
mosthatedk5 Registered User Join Date: Jan 2010 Location: north richland hills texas Posts: 126	Re: What year did emissions come standard? idk cuz i had a 78 chevy and i was emmisions exempt... they just did my safety and thats it... i have and 81 blazer now which i think is the same way...

01-29-2010, 03:11 AM	#9
andrewmp6 Registered User Join Date: Jan 2009 Location: Louisville,Ky Posts: 5,811	Re: What year did emissions come standard? It depends your state mine don't start testing tell 86 some like utah is 67 tell now on cars.

01-29-2010, 03:32 AM	#10
d!nk76 Registered User Join Date: Jan 2010 Location: Port Hueneme, Ca Posts: 2	Re: What year did emissions come standard? California is '75 and Up I believe __________________ Hi. I'm Josh Current Rides: '76 Chevy K10 Cheyenne SWB - The Project '01 Ford Focus - Daily Beater '07 Nissan Xterra - Wife's Beater '09 Ford F250 Super Duty - Tow Vehicle

01-29-2010, 05:55 AM	#11
spinem haha, ford guys... Join Date: Feb 2007 Location: Visalia, CA Posts: 576	Re: What year did emissions come standard? 73 is when they put their foot in the dorr with vacc sensors. 74 (my truck) has the air pump /w/ the exhaust pick up off of the collectors, not the header-tubes. so accuracy, 74 was official.

01-29-2010, 10:11 AM	#12
ToughBowtieTruck Registered User Join Date: Dec 2009 Location: MI Posts: 111	Re: What year did emissions come standard? I know for a fact my '77 3/4 ton, 6300 gvw had no cats factory, just the PCV system. No vapor canister, no A.I.R. pump, nothing. My uncle bought it new and it was titled as the weight of 4483. (commercial pickup truck). __________________ -Josh "Mr. Simpson, there are thousands of people like you with no discernible talent." Duff World Records Division "Yeah, they're called Congress!!" -Homer Simpson Last edited by ToughBowtieTruck; 01-29-2010 at 10:14 AM.

01-29-2010, 11:38 AM	#13
Jim85IROC Registered User Join Date: Dec 2004 Location: Readsboro, VT Posts: 502	Re: What year did emissions come standard? Dunno about 1/2 and 3/4 ton trucks, but 1-ton trucks didn't get cats until 87. The 1/2 and probably 3/4 had cats long before then. __________________ 1987 GMC Sierra Classic 3500 454 TH400 My Sounddomain Page

01-29-2010, 11:38 AM	#14
Silence86 Registered User Join Date: Feb 2009 Location: N. Richland Hills Tx Posts: 229	Re: What year did emissions come standard? i wanna say 86 here in texas they had to put mine as an 85 cause i didnt meet standards.. i was a year off __________________ 1986 gmc sierra....http://67-72chevytrucks.com/vboard/a...hp?albumid=622

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