Yes, my 2010 and one of my 2013s leaked the same way. Third brake light seal. Not a hard fix. Pull the brake light put some sealant along to top and sides of the seal.
I been making it a point when needing to fill DEF. Turn the nossle downward before ever bringing it up to the truck. Those nossels all seem to have fluid in them when being taken from the pump.
It's not to hard to add a little cooler to the PS on these LMMs. IDK why it was eleminated on that engine model. The years before had it and the models after do.
I had to change out lines multiple times on the 2010, even the brake master cylinder do to leakes. Get the heat of that oil down the leaks stop.
Someone posted on another forum the easiest spot to run outta cab is where the emergency brake cable enters, on the floor right below the accererator pedal.
Then you'll have to fish it up from below the carpet to where the carpet ends behind the pedal.
646,000 on the SRW, figure it was time to pull radiator because changing fan clutch. The truck still doesn't get hot like the 2010 did. Never seen temps above 215.
Also put on some rancho 9000 shocks. Set to 7.
I run an Edge Insight CTS on my diesels to read engine parameters. Those stock gauges are misleading.
Nice thing about My edge is it will read 10 things at once. I think the new ones will read 12.
GM seems to only went half retard on the C&C frame. Looks like it's only gonna take minimal mod to get the airlift bag kit order for the 2010 on.
Cut off
Dry fit
All bolted down