2004 GMC Yukon Denali Q&A

2004 GMC Yukon Denali Question: Check engine light

How do you get the light to turn off? -
Answer 1
after the vehicle fault is repaired, he light will be re set Roy -
Answer 2
Have you checked the gas cap? It may not be sealing properly. -
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A Loose or worn gas cap may cause Check Engine Light to illuminate.
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A Loose or worn gas cap may cause Check Engine Light to illuminate.
...tion check valves may become restricted causing poor air flow resulting in illumination of the Check Engine Light. It is often recommend to replace both check valves even if a fault code is set for only one...