The Wife and I purchased a 2020 GMC Denali Dually on July 2020. Took vehicle into Grey Chevrolet for check engine light appt was on 7/15/2021. After sitting on the vehicle for 5 days all they did was clear codes and said was good ( RO # 6100456/1) picked up truck and engine code was still there could not even get the service writer to acknowledge me when i went back in. Took truck to Bellevue GMC (was Kirkland GMC) where i bought it. (invoice GCCS315919) they found that they had to replace two injectors. Shows me how Grey takes care of GM customers. Word of mouth goes a long ways. Now that i have to go to Bellevue for service which is 1.5 hours away that is unsat. Dennis Hrdina( [protected]@yahoo.com )