Having problems with your GMC Cars & Trucks ?

Flashing emissions light

\015 The emissions light is on pretty much all of the time and recently when I drive over 45 mph it starts flashing. The car was recently inspected and passed, but the engine is loud, especially when first starting up. After driving for a while it gets better, but the engine doesn't run smoothly on a regular basis. I am not even sure if that is related to the emissions light, but it gets worse when the light is flashing, so it might be.\015 Posted / edited by AnonymousUser on : 12-03-2018

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