Welcome to the Forum from NH.
Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.
I hope that you will become a participating member in the Forum's discussions.
Pics of the truck, please.
I cannot personally assist you with your issue, but other members of this Forum much more knowledgeable than me in this area will chime in. It would seem to me that this would be possible, if a flasher unit is used on your truck (versus an electronic relay contained in the BCM). If it is a relay, you would need to connect to the trigger contact on the relay, though you would have to assess how much amperage is needed to operate your strobe unit.
