Question about GMC Yukon XL
My car is emmiting blue smoke from exhaust and failed mot on emmisions does anyone know the likely cause?Failed on carbon monoxide content at idle excessive,2nd fast idle excessive,hydrocarbon content after 2nd fast idle excessive and exhaust emissions lambda reading after 2nd fast idle outside specified limits.Also needs cambelt and tensioner replacement is this expensive?
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Posted on Jan 02, 2017
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