OK, so no one wanted to answer my question about the motor running constantly during failure, so I tore it apart. It appears that when the cable breaks the motor keeps running until the antenna trips some electrical switch that shuts it off at one or the other end point.
Oh, and Len, you really must be some kinda miricle man. This is a 5 hr. job MINIMUM in my opinion, jester, and berky2500, I found some of the info at
Zip better than the GM instructions, but I left the antenna fully exteded when puting the unit back together, thereby avoiding the messy rewinding job they describe. They do not describe or suggest replacing the gromets with nuts and bolts, which GM does. Also their price for the kit is an outrage! There is almost nothing about this job that is easy
Anyway, I ended up getting the replacement part from a local dealership. $15.52 jobber, about $25 retail . Like this
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2408742246&category=6774
and this is a good price. The instructions were nothing to brag about. They don't suggest claening off old sealant and replacing with new, as the Zip article did. And, they provided no tool, nuts and bolts or sealer for repair.
All in all, it went back in easier than it came out, but about three hours incuding the repair of the antenna. The biggest problem I encountered was reinsertion of the rubber wiring gromet back into the body. It is in a location that is extremely hard to get any leverage on, and you need a LOT of pressure to reinsert it. Knowing that all you on this forum are as meticulous as I am about your car, this SOB is going back like I found it come hell or highwater, I found a way:bash . Take out the far left taillight and you can go straight at it,another 20 min:duh This is important in order to keep moisture and road dirt out of your interior.
I hope this information helps limit some frustration for others who attempt to tackle this LITTLE repair job:gap