catalytic converters - The 1947 - Present Chevrolet & GMC Truck Message Board Network

wlarue72 · 11-14-2002, 12:07 AM

My 78 gmc does not have catalytic converters. What was the first year that these trucks were equipped with a converter. How can I find out whether or not I am supposed to have them on my truck?

Prerunner1982 · 11-14-2002, 12:12 AM

my 82 had them... not sure about in texas, but we no longer have emissions testing here so it doesnt matter much...

jon

79BIG10 · 11-14-2002, 02:49 AM

I know in Texas 84 and older do not have to have cats. I passed emissions fine without cats.

KIILew · 11-14-2002, 03:25 AM

wlarue72,

I know that Brandon provided a more practical answer regarding whether Texas law requires cats on your rig. Nevertheless, since other posters occasionally ask similar questions, and since I once wrote an answer to one of these inquiries on this board, I am going to try to post a link to that earlier thread here...

http://67-72chevytrucks.com/vboard/s...&threadid=4408

Tom · 11-14-2002, 11:20 AM

My 78= no emissions equipment except for PCV valve.
My 79= cats, evap canister, and PCV.

PHOENIX · 11-14-2002, 12:47 PM

There is a sticker under your hood, by the latch. I believe it tells you if the truck came with a cat from the factory. That sticker is what AZ uses to make sure you have everything you should.

wlarue72 · 11-14-2002, 03:22 PM

KIIlew, thanks for the info. I guess I will go with the cats to be safe!

pkbinplano · 11-16-2002, 01:38 AM

Don't put cats on it till if fails inspection ! I want to get rid of mine but need to research it at the DMV before I hack it off and put on duals.

11-14-2002, 12:07 AM	#1
wlarue72 Registered User Join Date: Nov 2002 Location: DFW Texas Posts: 244	catalytic converters My 78 gmc does not have catalytic converters. What was the first year that these trucks were equipped with a converter. How can I find out whether or not I am supposed to have them on my truck?

11-14-2002, 12:12 AM	#2
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,904	my 82 had them... not sure about in texas, but we no longer have emissions testing here so it doesnt matter much... jon __________________ Jon 1982 Chevy Silverado 350/th350.... RETIRED 1993 Jeep XJ 2 door(Cherokee) 4wd 4.0ltr/AX-15 (5spd)/NP231 .... Oklahoma Roll Call

11-14-2002, 02:49 AM	#3
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,774	I know in Texas 84 and older do not have to have cats. I passed emissions fine without cats. __________________ 1979 Chevrolet Bonanza Big10 "Tootsie Roll" 1985 Chevrolet Silverado (wife's) Member of the Southern Bowties Club "Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson

11-14-2002, 11:20 AM	#5
Tom driving is in my blood Join Date: Dec 1999 Location: Mesa AZ Posts: 5,748	My 78= no emissions equipment except for PCV valve. My 79= cats, evap canister, and PCV. __________________ -78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle. -98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes. -02 Suburban 4x4: leveled front -CBR600F4i, CBR600RR, CBR1000RR, and standup skis DISCLAIMER: I cant spell for the life of me.

11-14-2002, 12:47 PM	#6
PHOENIX Registered User Join Date: Oct 2002 Location: Phoenix, Arizona Posts: 4,703	There is a sticker under your hood, by the latch. I believe it tells you if the truck came with a cat from the factory. That sticker is what AZ uses to make sure you have everything you should. __________________ * AVOID: LOPER'S PERMORANCE / LOPERSPEED.COM OF PHOENIX, AZ & COTTMAN TRANSMISSION *

11-14-2002, 03:25 AM	#4
KIILew Active Member Join Date: Mar 2002 Location: Prosser, WA 99350 Posts: 147	wlarue72, I know that Brandon provided a more practical answer regarding whether Texas law requires cats on your rig. Nevertheless, since other posters occasionally ask similar questions, and since I once wrote an answer to one of these inquiries on this board, I am going to try to post a link to that earlier thread here... http://67-72chevytrucks.com/vboard/s...&threadid=4408

11-14-2002, 03:22 PM	#7
wlarue72 Registered User Join Date: Nov 2002 Location: DFW Texas Posts: 244	KIIlew, thanks for the info. I guess I will go with the cats to be safe!

11-16-2002, 01:38 AM	#8
pkbinplano pkbinplano Join Date: Nov 2002 Location: Plano Texas Posts: 370	Cats Don't put cats on it till if fails inspection ! I want to get rid of mine but need to research it at the DMV before I hack it off and put on duals. __________________ http://www.picturetrail.com/gallery/...7496&members=1 84 chevy silverado aka The Bananna Boat



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