I've installed many alarms and remote starters before.

It set to tach mode.

The problem hasn't happened since the weather got warmer. In any case, I removed the SL module and installed a new SL2 module. Hopefully this will resolve any issues, but I won't be able to tell until the weather gets cold again...

 

just a thought.. most remote started ive installed, i needed to use thicker wire for the remote start portion.. since it draws a lot of current to remote start esp. in the cold, i used an amp power wire (ie. 10gauge) directly to the battery instead of the cheap wire that comes with the alarm that you tap into an existing power supply.. its just to make sure its getting enough power to support it.. denno if it helps you, but thought id give it a try..