VMSpc Downloads

The VMSpc software are always available for download.

Current version is v4.0.5. However, due to a couple surprise! bugs (Odometer and Offsets), we're marking it as an Official Experimental-Beta. I'm also putting the v3.0b1 back up...for now...

Check the Forum for bug fixes and changes.

The new 4.x software mixes the original layout style with a new feature set. Once you try this new version out, you'll never want to go back to anything else!

Even if you don't have the VMSpc Cables and Hardware you can still install and try out the software. You can see for yourself how easy it is to customize VMSpc to your tastes. And when you are ready to "go live", give us a call at (888) 741-0259 and we'll set you up with everything else you need.

Software upgrades are free forever. When in doubt: Read the FAQ


As diagnostic ports vary greatly across the spread of coach-builds and years, the pinning and socket types vary significantly. When you call we will ask you what type of Diagnostic socket you have in your coach. This may require a close look to determine the physical nature of the socket, number of pins available and those used in that socket. Refer to the document, SilverLeaf Electronics J1708/J1587, J1939, RV-C Wiring Diagrams to identify what the Diagnostic sockets look like. Its regretful that, for this reason alone, we're not able to have an online store.

To start a fresh installation, download the latest "Distribution Disk," below. However, when first prompted, Open it (don't download it) --save/copy the Folder it contains to a place on your PC you can find easily, such as c:\ or your Desktop.

Install the drivers by Opening 'Install_Drivers.exe' Once the driver Software has completed, Install program from that same folder ("Distribution_Disk_v4.0.x_[date]"). These steps can be reversed. Reboot, open the program, select your specific engine and confirm the communications are set; USB JIB etc. Need a hand? Call so we may walk you through.

If you are having difficulty Installing VMSpc v4.x, please refer to our All Versions Frequently Asked Questions Page for further information.

Be sure to give a call if you get stuck or need clarification.

Need an engine calibration file not on the list? Look here: Engine Calibration Files New engines are added on an as-needed basis for the most part...

Older program versions (prior to v4.x) and drivers have been archived; contact us by phone or Tech Support (below) for help.

VMSpc Downloads

Distribution_Disk_v4.0.5_05_04_2017.zip15.61 MB
VMSpc_4.0.6_Owners_0.pdf3.37 MB
Signed_Drivers_Only_04-16-2015.zip2.2 MB
Distribution_Disk_USB_Jib_v3.0_12_24_2015.zip4.72 MB
Distribution_Disk_USB_Jib_v3.1b3_10_26_2015.zip4.68 MB
Distribution_Disk_VMSpc_v2.5b10c.zip4.62 MB
Wifi Manual Addendum Hardware.v.2 rev.2.05.pdf125.86 KB
Additional_Engines_(05-04-2017).zip43.78 KB