The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Which of the '73-'80 Chevy's had catylitic converters and which didn't?

alf4444 · 05-06-2003, 10:14 AM

I will add to the confusion. My 78 1/2 ton blazer originally had a 400, does not say "unleaded fuel only" anywhere, had no diagram on radiator support and had no cats. Its GVW is under 6000. It also has no smog pump or anything emmisions related that i can see, unless you count a PCV valve. My buddies 78 truck was identical. Both of these vehicles have resided in emmision counties of Utah for their entire lives. And his passed, hope mine will too

05-06-2003, 10:14 AM	#37
alf4444 Registered User Join Date: Dec 2002 Location: taylorsville, UT Posts: 778	I will add to the confusion. My 78 1/2 ton blazer originally had a 400, does not say "unleaded fuel only" anywhere, had no diagram on radiator support and had no cats. Its GVW is under 6000. It also has no smog pump or anything emmisions related that i can see, unless you count a PCV valve. My buddies 78 truck was identical. Both of these vehicles have resided in emmision counties of Utah for their entire lives. And his passed, hope mine will too __________________ 2011 CCSB GMC 2500HD DMAX 73 GMC 3/4 ton 4x4 96 Chevy 1500 STD Cab Shortbed Z71 Owner of WickedWolfRC.com