First off want to thank RustedElvis for his Invisicord guide in the CTS section of this forum. Here is the link:
http://www.cadillacforums.com/forum...ums/cadillac-cts-forum-2008-beyond/137007-easy-radar-detector-installation.html
To keep things simple I will paste his steps with some more detail and then give my guide on the BlendMount. I would do the Invisicord stuff first because I was having to move the mirror around to get the plug out. BlendMount limits how far you can bend the mirror.
Invisicord...
Step 1: Remove wire harness from rear view mirror. I folded the mirror to where it was facing the ground and then pushed in the clip on then pulled up. It is a little tough to get out the first time I kept working it from side to side.
Step 2: Once you unplug the harness you can then remove the plastic back plate from the plug. At the neck where the wires go in there are little clips on each side. Undo them and then you can fold the neck piece around. Now you can pop the back plate off. This took a little effort and wiggling to get it off.
http://i42.tinypic.com/29x9rph.jpg
Step 3: Push ground with black wire on the top row, only wire on the top row. Push 12v with solid yellow wire on the bottom row (3rd wire from the left)
Step 5: Push the wire plug back into the rear view mirror. Hardest part was taking the plastic cover off the wire harness. Detector powers on when the car starts and powers off immediately when the engine is turned off.
BlendMount...
Step 6: Package contents. All the tools you will need are supplied by BlendMount.
Step 7: Take the suckers off the V1 mount and fasten it to the BlendMount.
Step 8: The 08-09 CTS-V stem is 7/8" or 23mm so you do not need the bushing. Mount the BlendMount loose to the stem of your mirror and then adjust it to your liking.
Conclusion: Invisicord is a must have in order to avoid messing with wires and it is extremely easy to use. The BlendMount is a quality product and not a cheap piece of metal. It is fully adjustable which makes it the best option available in my opinion (Adjustment is important considering every mirror is different). BlendMount is very fast with their shipping.
http://www.cadillacforums.com/forum...ums/cadillac-cts-forum-2008-beyond/137007-easy-radar-detector-installation.html
To keep things simple I will paste his steps with some more detail and then give my guide on the BlendMount. I would do the Invisicord stuff first because I was having to move the mirror around to get the plug out. BlendMount limits how far you can bend the mirror.
Invisicord...
Step 1: Remove wire harness from rear view mirror. I folded the mirror to where it was facing the ground and then pushed in the clip on then pulled up. It is a little tough to get out the first time I kept working it from side to side.
Step 2: Once you unplug the harness you can then remove the plastic back plate from the plug. At the neck where the wires go in there are little clips on each side. Undo them and then you can fold the neck piece around. Now you can pop the back plate off. This took a little effort and wiggling to get it off.

Step 3: Push ground with black wire on the top row, only wire on the top row. Push 12v with solid yellow wire on the bottom row (3rd wire from the left)

Step 5: Push the wire plug back into the rear view mirror. Hardest part was taking the plastic cover off the wire harness. Detector powers on when the car starts and powers off immediately when the engine is turned off.
BlendMount...
Step 6: Package contents. All the tools you will need are supplied by BlendMount.

Step 7: Take the suckers off the V1 mount and fasten it to the BlendMount.


Step 8: The 08-09 CTS-V stem is 7/8" or 23mm so you do not need the bushing. Mount the BlendMount loose to the stem of your mirror and then adjust it to your liking.



Conclusion: Invisicord is a must have in order to avoid messing with wires and it is extremely easy to use. The BlendMount is a quality product and not a cheap piece of metal. It is fully adjustable which makes it the best option available in my opinion (Adjustment is important considering every mirror is different). BlendMount is very fast with their shipping.