NHTSA Complaint #11499311 — 2019 CHEVROLET EQUINOX

I purchased the crossover 2019in or around Sept 2021 the engine light appeared, it was taken to Reedman Toll Chevy of Springfield and they replaced the mass air flow sensor or oxygen sensor. Sept 2022 the engine light appeared again they replaced the oxygen sensor, Dec 19,2022 the engine light appeared again the vehical was taken to Reedman were it remains and I am being told it's th orifice tube(PVC tube). They stated this part is not covered under warranty after research GM bulletin No.: 20-NA-047 states this part is in fact covered. Reedman states the coverage of the service is $2,000.00 I contacted GM warranty dept (Irene) case#9-8392615536 who stated the part is covered also. Reedman refuses to follow the order given under the bulletin and GM.