diff --git a/docassemble/ALToolbox/al_income.py b/docassemble/ALToolbox/al_income.py
index 6aa3e2d6..6bef8d3e 100644
--- a/docassemble/ALToolbox/al_income.py
+++ b/docassemble/ALToolbox/al_income.py
@@ -701,13 +701,13 @@ def init(self, *pargs, **kwargs):
         if not hasattr(self, "source"):
             self.source = "vehicle"
 
-    def year_make_model(self) -> str:
+    def year_make_model(self, separator="/") -> str:
         """
         Returns a string of the format year/make/model of the vehicle. Triggers
         gathering those attributes.
         """
-        return f"{ self.year } / { self.make } / { self.model }"
-
+        return separator.join([self.year, self.make, self.model])
+    
 
 class ALVehicleList(ALAssetList):
     """List of ALVehicles. Extends ALAssetList."""