: Drivers and software are provided to authorized dealers and customers through the Caterpillar Service Information System (SIS) Dealer Software Licensing (DSL) Installation Method Install the Cat Electronic Technician software from your provided media or digital download. Comm Adapter Toolkit found under All Programs > Caterpillar Comm Adapters to verify the adapter is detected. If using a USB-to-Serial adapter

Do not download drivers from third-party "driver download" websites. They are often outdated or contain viruses.

Even with the correct file, problems occur. Here is how to solve them.

The driver is always bundled with the Cat Electronic Technician software. If you have Cat ET installed, the driver is likely already on your hard drive. Look in: