2007 LTZ with 172,000. Let me start by saying I love this truck I have set it up perfectly for my tastes over the last 4 years of ownership and struggle with the idea of having to step out of it into something with lower mileage in the near future. At its last checkup a slight oil leak is developing from the driver side head. I’m told it’s common with high mileage 5.3 Ltr engines. My questions revolve around what to do. I’m guessing head gasket repair is out because of the mileage. Band aid on a time bomb? Engine replacement?? What would advise for replacement. If I go this route I would prefer to put some performance back in its place, instead of the anemic stock version of the 5.3. What would you guys recommend? Keep in mind it is my wife’s daily/family hauler, so reliability is key.