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1997 Chevrolet C K 1500 Base Reg Cab 117.5 WB (CMI)

1997 Chevrolet C K 1500
Trim Info:
Rear Wheel Drive, Reg Cab 6.5' Fleetside
17 mpg city / 22 mpg hwy
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April 4, 2013, 10:10 am

Gus G

Question: Cats need to be replaced on my truck.

I have a 96' silverado that needs new cats. It is a california spec truck. I live in Texas so we don't have as strict emission laws as they do. My question is, do i need to put california spec cats back in it or can i just replace them with regular ones? Would the computer accept the regular ones or will it still throw up codes? Thanks.

April 7, 2013, 9:20 am

Ron W
Expert Mechanic

Legally you must install the CA certified cats as that is what it came with. If you put federal cats in it, it may work (and the computer may not care), but because you are doing something other than what is factory, there could be issues.

And if you ever move to CA, it will fail the California Smog check as part of the inspection is to verify that the proper cats were installed.

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