Determining Emissions Equipment - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**shambles** · 03-30-2023, 11:21 PM

How would I find out what emissions equipment originally came on my truck? It's a 1978 GMC C15. Bought new here in Arizona. The RPO Code says NA2-Standard Emissions system. I only have charcoal canister, and catalytic converters. No smog pump or ports in the exhaust Manifolds. It's a 250 inline 6.

I'm getting ready to go through emissions test for the first time. The truck hasn't been registered in years.

Thanks.

03-30-2023, 11:21 PM	#1
shambles Junior Member Join Date: Jul 2010 Location: Goodyear, AZ Posts: 68	Determining Emissions Equipment How would I find out what emissions equipment originally came on my truck? It's a 1978 GMC C15. Bought new here in Arizona. The RPO Code says NA2-Standard Emissions system. I only have charcoal canister, and catalytic converters. No smog pump or ports in the exhaust Manifolds. It's a 250 inline 6. I'm getting ready to go through emissions test for the first time. The truck hasn't been registered in years. Thanks.



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