When I was backing up my 2001 Blazer, I went to put into drive and the shifter felt very free and would not shift out of neutral. I call the tow truck and the guy needed to blazer in neutral to get in on the flatbed. I told him it was tuck in reverse and he went under the right side of the truck aqnd said the linkage to the tranny came off. He was able to shift in neutral by had and snapped the linkage bacl together. He indicated there was some sort of pin that should the linkage together. I had him tow it our local GM dealer and they claim they can find no missing pins?
Any thought on what I should tell the repair dude to look at?

 

You could have broken or just dislodged somehow the end of the cable where it attaches to the shift lever at the transmission or the adjustment could have unlocked which would have resulted in you not being able to shift the transmission.

THIS LINK shows the relevant parts. THIS LINK will show you how to adjust the shifter.

 

Is there any thing to keep the cable from becoming dislodged? Kotter pin?

 

The adjustment is supposed to have a lock on it, but if it was damaged... You really need to get in there and inspect it. See what's loose. The connection to the transmission shift lever is a detent style connection or a ball/socket connection. Either should snap into place.

 

I had it in the shop and they said they could find nothing wrong. Is it possible for the darn thing to pop out? The guy that towed my car said he put the linkage back together, but thought it needed something to secure the connection in place to keep it from popping out again.

Does any one have a dwg or diagram of the linkage where it connectd to the tranny?

 

Its possible that something popped up in there and dislodged the shift cable where it connects to the shift arm out of the transmission, but that would be a pretty out there occurrence. Another possibility is that someone was trying to mess with you. All it takes is a screw driver and 10 seconds of time to pop the linkage off. If it didn't come all the way off, you would have been able to move it some, but then it could have slipped off the rest of the way.
First link in my first post.