if the dealer is incompetent, contact the warranty person for Roo/Shamrock and ask for a recommendation to another dealer.
hopefully you can show that this has been a long standing issue.
maybe some of our Canadian Roo/Shamrock owners can chime in with some recommendations.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC