I could tell you that I will put one together, but I would be lying. We just don't have the time. However, if you guys want to post links to worthwhile write-ups, instructions, do-it-yourselfs, etc, I will index them in the first post of this thread as you add them.
Engine, Drivetrain and Mechanicals:
Timing Chain Recall Thread: http://www.cadillacforums.com/forum...sion/222387-2008-cts-timing-chain-recall.html
AWD differential binding during turns: http://www.cadillacforums.com/forum...70-awd-shudder-during-sharp-turns-please.html
3.6 Non-DI Spark Plug Change: http://www.cadillacforums.com/forum...ssion/252622-how-change-your-spark-plugs.html
Steering vibration thread: http://www.cadillacforums.com/forum...ave-we-solved-steering-vibration-freeway.html
Trans Fluid Change: http://www.cadillacforums.com/forum...s-transmission-fluid-change.html#post16051265
Front diff fluid change: http://www.cadillacforums.com/forum...sion/331066-diy-front-diff-pic-pic-fluid.html
Rear diff fluid change: http://www.cadillacforums.com/forum...iscussion/331058-diy-rear-diff-w-lsd-pic.html
Transfer case fluid drain fill procedure: http://www.cadillacforums.com/forum...2793-need-transfer-case-fluid-drain-fill.html
DIY replacement of the input/output shaft: http://www.cadillacforums.com/forum...-another-awd-stripped-input-output-shaft.html
Drainage of the AC Evap: http://www.cadillacforums.com/forum...255800-help-need-service-techs-advice-my.html
Entertainment, Navigation, etc:
Bluetooth add on How-to and information: http://www.cadillacforums.com/forum...iscussion/187314-2008-gen-7-gen-8-onstar.html
Bose 5.1 Surround Sound information: http://www.cadillacforums.com/forum...ion/230478-bose-5-1-cabin-surround-sound.html
Interior:
Mold removal + Cabin filter change: http://www.cadillacforums.com/forum...n/324353-diy-moldy-c-smell-removal-cabin.html
Sunroof Water Leaks: http://www.cadillacforums.com/forum...n/241035-water-leak-passenger-floor-area.html
Seat Belt Pilling/fraying: http://www.cadillacforums.com/forum...scussion/229908-seat-belt-pilling-solved.html
Re-indexing windows to fix auto-express windows: http://www.cadillacforums.com/forum...-passenger-window-express-up-not-working.html
Rear Deck Rattle Fix: http://www.cadillacforums.com/forum...y-detailed-description-rear-deck-removal.html
Exterior:
Wagon taillight fix: http://www.cadillacforums.com/forum...cubed3rs-wagon-taillight-fix-easy-hidden.html
Gen 2 CTS to CTS-V Front & Rear Bumper swap: http://www.cadillacforums.com/forum...nce-mods/244236-cts-v-bumpers-08-cts-how.html
Backup Camera Install: http://www.cadillacforums.com/forum...2619-how-install-rear-view-backup-camera.html
Heated washer fluid system replacement with AT37GM: http://www.alphathermusa.com/GM-cars-unit-placement.html
General Information:
Owner's Manual Thread: http://www.cadillacforums.com/forum...scussion/224106-owner-manuals-pdf-format.html
Performance Mods:
Aftermarket Lowering Spring Installation: http://www.cadillacforums.com/forum...-diy-how-install-lowering-springs-eibach.html
Engine, Drivetrain and Mechanicals:
Timing Chain Recall Thread: http://www.cadillacforums.com/forum...sion/222387-2008-cts-timing-chain-recall.html
AWD differential binding during turns: http://www.cadillacforums.com/forum...70-awd-shudder-during-sharp-turns-please.html
3.6 Non-DI Spark Plug Change: http://www.cadillacforums.com/forum...ssion/252622-how-change-your-spark-plugs.html
Steering vibration thread: http://www.cadillacforums.com/forum...ave-we-solved-steering-vibration-freeway.html
Trans Fluid Change: http://www.cadillacforums.com/forum...s-transmission-fluid-change.html#post16051265
Front diff fluid change: http://www.cadillacforums.com/forum...sion/331066-diy-front-diff-pic-pic-fluid.html
Rear diff fluid change: http://www.cadillacforums.com/forum...iscussion/331058-diy-rear-diff-w-lsd-pic.html
Note: According to this post, the Slip Lock Differential Additive is only needed for cars with the limited slip differential. To determine whether or not your car has the limited slip differential, check your RPO sticker for code "G80". Note that the diff change procedure above is for an '08 and the code for the limited slip differential is for an '09. It probably hasnt changed but just in case...
Transfer case fluid drain fill procedure: http://www.cadillacforums.com/forum...2793-need-transfer-case-fluid-drain-fill.html
DIY replacement of the input/output shaft: http://www.cadillacforums.com/forum...-another-awd-stripped-input-output-shaft.html
Drainage of the AC Evap: http://www.cadillacforums.com/forum...255800-help-need-service-techs-advice-my.html
Entertainment, Navigation, etc:
Bluetooth add on How-to and information: http://www.cadillacforums.com/forum...iscussion/187314-2008-gen-7-gen-8-onstar.html
Bose 5.1 Surround Sound information: http://www.cadillacforums.com/forum...ion/230478-bose-5-1-cabin-surround-sound.html
Interior:
Mold removal + Cabin filter change: http://www.cadillacforums.com/forum...n/324353-diy-moldy-c-smell-removal-cabin.html
Sunroof Water Leaks: http://www.cadillacforums.com/forum...n/241035-water-leak-passenger-floor-area.html
Seat Belt Pilling/fraying: http://www.cadillacforums.com/forum...scussion/229908-seat-belt-pilling-solved.html
Re-indexing windows to fix auto-express windows: http://www.cadillacforums.com/forum...-passenger-window-express-up-not-working.html
Rear Deck Rattle Fix: http://www.cadillacforums.com/forum...y-detailed-description-rear-deck-removal.html
Exterior:
Wagon taillight fix: http://www.cadillacforums.com/forum...cubed3rs-wagon-taillight-fix-easy-hidden.html
Gen 2 CTS to CTS-V Front & Rear Bumper swap: http://www.cadillacforums.com/forum...nce-mods/244236-cts-v-bumpers-08-cts-how.html
Backup Camera Install: http://www.cadillacforums.com/forum...2619-how-install-rear-view-backup-camera.html
Heated washer fluid system replacement with AT37GM: http://www.alphathermusa.com/GM-cars-unit-placement.html
General Information:
Owner's Manual Thread: http://www.cadillacforums.com/forum...scussion/224106-owner-manuals-pdf-format.html
Performance Mods:
Aftermarket Lowering Spring Installation: http://www.cadillacforums.com/forum...-diy-how-install-lowering-springs-eibach.html