The induction systems get completely carboned up because it never gets a chance to run a regeneration. And by carboned up I dont mean “spray a few spritz of intake cleaner in there” I mean remove the EGR cooler and intake manifold and chisel out the carbon. Also all the DEF system either Leaks, pump fails, injectors fuck up, goes into limp mode..... I’ve replaced more Cruze and Silverado DEF pump assemblies than I care to remember.
I'm more happy with my 3.6 right now
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