Thread: Codes P0420 and p0430
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Old 10-25-2010, 12:08 PM   #2
ChevLoRay
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Re: Codes P0420 and p0430
Does your truck emit black smoke on startup?
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'96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed.

'69 C-10 SWB; 350/TH400 - in limbo

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