Thank you TJ! That did it!
Private Sub ProductIDCombo_AfterUpdate()
Make = DLookup("Make", "ProductList", "ProductID= '" & me.ProductIDCombo & "'")
Model = DLookup("Model", "ProductList", "ProductID= '" & me.ProductIDCombo & "'")
AssetType = DLookup("AssetType", "ProductList", "ProductID= '" &...