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75sierraclassic · 06-09-2009, 08:31 AM

Please correct me if I am wrong, but I understood that they started putting cats on trucks in 75. If the truck had a GVW under 6001 lbs it was fitted with cats, if it was over (heavy duty trucks) it didn't have cats. I was looking into it because my 75 GMC Sierra Classic never had cats on it (but I didn't own it until 1999). I have the F44 Heavy Duty Chassis option which puts my truck at 6200 GVW so I am pretty sure it never had cats on it.

06-09-2009, 08:31 AM	#11
75sierraclassic Registered User Join Date: Jun 2002 Location: Kansas City, MO Posts: 186	Re: Question about cats and arizona. Please correct me if I am wrong, but I understood that they started putting cats on trucks in 75. If the truck had a GVW under 6001 lbs it was fitted with cats, if it was over (heavy duty trucks) it didn't have cats. I was looking into it because my 75 GMC Sierra Classic never had cats on it (but I didn't own it until 1999). I have the F44 Heavy Duty Chassis option which puts my truck at 6200 GVW so I am pretty sure it never had cats on it.