Check the listing for details. Thexton: GM Micropak Coil Adapter 388 NEW NEVER OPENED!. Condition: Used, Made in United States. Listed at 12.00 USD. The Thexton GM Micropak Coil Adapter 388 is a brand new, never opened diagnostic service tool designed for passenger vehicles and heavy-duty/commercial vehicles. This adapter, with a length of 1 foot, allows for seamless compatibility with GM vehicles, providing a reliable and efficient connection for troubleshooting and maintenance tasks. With the manufacturer part number 388, this adapter from Thexton is a must-have for automotive professionals looking to streamline their diagnostic services. I have many unopened Thexton parts. Check out our other items to save on shipping. And if we don’t have it posted, we probably have it. Just let us know what you’re looking for and we can come up with a good price for you, on anything you need. Thank you