freon leak on 2004 GMC Sierra 1500

we check under the hood and no leak, where and what would be the cost.

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1 answer 1 comment
Cost would depend on locating the leak, evacuating the system and then recharging the system.Cost ill certainly depending on what is found to be wrong.
I was told by a freind that it could be in the dash, if true how long would it take and about the cost.