This Merchant Automotive High Idle Switch, part number 10457, is a great addition for 2001 - 2004 GM trucks with the LB7 6.6L Duramax engine. It's a stealthy solution that allows you to quickly warm up your truck in cold weather and reduces wear and tear during long idling periods. You can control it through your existing cruise control switches, so there's no need to add extra equipment in the cab. Features include operation only in Park and Neutral, easy installation, use of factory controls, and compatibility with both stick - shift and auto trucks.

Using this high idle switch is simple. When your truck is in Park or Neutral, you can use the cruise control switches to control the high idle function. This way, you can warm up your truck faster in cold weather. When you're driving on the road, the cruise control will work as normal. Installation is easy, but make sure to follow the included instructions carefully. As for maintenance, there's not much you need to do. Just keep it clean and check the connections regularly to ensure it functions properly. And remember, this switch only works in Park and Neutral, so don't try to use it while driving.