The Tremec DCT TR9080 dual clutch transmission (RPO M1L, M1M) on 2020-2023 Corvettes features a transmission canister filter (Fig. 3) that should be replaced at the initial 7,500-mile (12,000-km) maintenance service and at regular intervals. The canister filter change in the first 7,500 miles (12,000 km) is critical due to the initial break-in of the internal transmission components.
Fig. 3
Maintenance Coverage
GM has extended maintenance coverage of the filter to two years or 7,500 miles (12,000 km) on the first filter change to cover vehicles that do not accumulate 7,500 miles in the first year. It is recommended to only replace the filter (Fig. 4) at the required maintenance intervals due to the loading characteristics of the filter.
TIP: In Canada, only 2022-2023 model year Corvettes are eligible for coverage of this service.
The initial filter change should be at 7,500 miles (12,000 km) and then at 22,500-mile (36,210-km) intervals.
Fig. 4
The filter does not need to be change earlier than 7,500 miles (12,000 km). GM will only cover one filter change.
Recommended miles intervals should be followed. If a customer elects to have the filter changed before 7,500 miles (12,000 km), it should be changed again at 7,500 miles (12,000 km). Check the maintenance schedule in the appropriate Service Information. (Fig. 5)
Fig. 5
TIP: Filter change information should be shared with your service advisors and service management. GM will be reviewing maintenance records on transmission warranty claims. Lack of maintenance on the canister filter cartridge may affect warranty coverage.
Maintenance Minder
The 2023 Corvette features a new maintenance minder on the Driver Information Center and will display a maintenance message shortly before the 7,500-mile (12,000-km) maintenance interval. (Fig. 6) The message will appear every 22,500 miles (36,210 km) after the first maintenance service is performed. The transmission filter minder cannot be reset like the engine oil life monitor.
Fig. 6
If the transmission is replaced, customers will need to keep track of the mileage, starting with the first 7,500 mile (12,000 km) maintenance service for the new transmission.
– Thanks to Marty Leach
GM’s coverage on first maintenance service, along with all applicable labor operations, can be found in Service Information (SI) by building the year/make/model, then accessing the vehicle’s Labor Time Guide, and then clicking Preface > Maintenance Programs > New Vehicle and CPO Labor Codes (US). The labor codes and coverage for Corvette LOF, transmission filter and fluid top off are provided, based on engine RPO.
We have been unable to find the labor and price breakdown for the first maintenance filter replacement, we have the old labor op number and pricing breakdown, and the new maintenance labor op of 0665175, but no pricing breakdown. Any help would be appreciated, thank you.
Kris Taylor
-Smith Chevrolet Idaho Falls, ID.
208-521-3549