Question about 2006 GMC Yukon Xl Denali

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What is the optimal operating temp for a 2006 yukon xl denali (6.0motor) I want more fuel efficiency not power (i have a cold air intake for power) I have 80k miles should I just change my t-stat. operating temp currently is just over 150 - just under 200?

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Operating temp is in range of what you are saying ,but its allways good to change the t-stat around that miles,,make sure to put correct coolant type in,best if not know buy all makes and models coolant ,,go ahead and flush your system also while you doing all this..

Posted on Aug 27, 2010

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Posted on Jan 02, 2017

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