For anyone having these problems with motors....take a look how tight the factory pulls the wires and straps them with clamps. Mine were so tight the rubber gasket was cracked,possibly allowing water inside . I loosened the clamp and made a nice smooth curve to the wire and re calked the gasket . This may have been the problem for everyone.
Wayne --Belle River , Ontario
2013 Sunset Trail Reserve 25RB..
(13,500 kms ..about 8200 mi...summer 2013 .Nfld and back.)(Water site 2 weeks at Algonquin Prov.Park summer 2014)
2012 Chev Avalanche 5.3l for the summer.