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Forum > Emissions Component > Question

1990 Chevy Silverado C2500 5.7 TBI - Does it have a smog pump?

Did my Chevy truck come with a smog pump from the factory? I can not find my trucks air injection pump and I think the previous owner has removed it.
Answer:

Yes, you Chevy C2500 did come equipped with an air injection pump also known as a smog pump from the factory. The smog pump will be required to pass a California smog check. If your truck's air injection pump has been removed, consider locating one at a local wrecking yard or contacting a local auto parts store for a rebuilt unit. Having the smog pump installed and functioning is not only required to pass the smog inspection but is also necessary in order to lower HC and CO emissions.

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