Lots of these Cadillac/CTS/V owners have their shit in one sock when it comes to repair, maintenance, and modifications.
Pour a decent bourbon & water, sit back, and dig into the sticky threads (marked with a push pin) in any forum of interest. CTS and its variants, Engines, Lounge, whatever. Stickies are timeless info for all owners of the particular car in the forum of interest.
FWIW, hydraulic clutch controls - pedal, lines, cylinders, mechanicals - can be a real PITA to keep functioning correctly.
You might want to spend $27 or so for a multi-year subscription to the real GM/Cadillac/Helm service manuals online in
www.alldatadiy.com.