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1990 Other GMC Models Failed California smog
I just failed CA smog, my HC levels are as such
Idle- RPM- 1062, HC measures 173
2500 RPM- HC measures 400
What should I do to correct this? Truck seems to run fine.
have the same problem?
Tuesday, August 19th, 2008 AT 6:51 PM
At that mileage, it could very well be the cat converter is all used up. They are a reactive material and will only last so long
Friday, August 22nd, 2008 AT 12:19 PM
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