How many miles on your 2011?I can't help with the DIY piece but just wanted to add that my local dealer (San Diego area) wants $4000 to do both left and right gaskets (5.0 V8 in my 2011). Only one is leaking but they recommended doing both to save on labor.
Luckily my extended warranty covers the leaking one so it's going to cost me my $150 deductible only.
If I didn't have a warranty; I'd certainly be looking at a DIY job though.
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