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  1. Chevy Silverado Forum (GMC Sierra)
    hello gm truck club commuinty i’m having issues with a smog readiness monitor not completing. any information on this issue would be greatly appreciated. my truck is a 2001 Chevy Silverado LS 1500 with a 5.3L v8 and it’s 4×2. all the readiness monitors complete except the secondary air system...
  2. General Chevy & GM Tech Questions
    I have an 89 GMC Sierra 1500. When I bought it there was no air pump on it. My question is this, Does Ca. Emissions require an air pump on the sierra? I’ve searched the web and found no solid answers.
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