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Re: P0446 code and SES light...
evap codes can be fun for sure. I was a nissan technician for almost 3 years, and have been at a GM dealership now for a few months. With a code like this i would check the canister, also how many miles on the Yukon?? and do you offroad or drive in the dirt alot. Ive seen on multiple vehicles that the vent hose was clogged up from excesive amounts of dirt, What I've done to many farm, and dairy trucks is ran the vent hose from canister to under the hood and put a valve cover breather on the end of the hose, worked many times
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