I recently had my Z1 pro installed in my 06 Grand Prix but the installer woudn't do the by-pass so i did it myself the other day. However, now since the bypass the speed sensor works most of the time but every once in awhile it just goes to 0 and sits there for a second and doesn't do anything. I had read that someone said that the pink wire connectors were flaky so i cut them off and redid them and it still does it....Anyone got any ideas?

Check and make sure the connection to the vehicle is tight. Also check an make sure the pin for the pink wire is partly pulled out of the harness.

what do you mean partly pulled out of the harness? Didn't think it was supposed to be

I menat to say isn't partly pulled out of the harness. Sorry mind thinks faster than fingers type.