8L45 Tcc Solenoid 2014-25, remanufactured and ready to install. Fits the 8L45. Ships fast from the USA.
If your GM eight-speed is setting a torque converter clutch code, cruising at higher rpm than it used to, or locking and unlocking at steady highway speed, the TCC circuit in the valve body is the place to look. This is a remanufactured valve body solenoid for the 8L45 and 8L90, listed under reference 24044716 for 2014 through 2025 applications including Silverado 1500, Sierra 1500, Tahoe, Yukon, Camaro and Corvette, and offered here as the replacement for the lock-up position. At a fraction of the cost of a new GM solenoid, it suits a budget repair where the rest of the valve body is healthy.
The 8L45 and 8L90 share the same control strategy: nine solenoids sit in the valve body, seven of them variable force pressure control units and two simple on/off units. The TCC solenoid is one of the variable force designs. Instead of slamming the converter clutch on, it meters signal pressure to the TCC regulator valve so the control module can hold the converter in a controlled slip at light load and full lock at cruise. Every pressure control solenoid in this family should measure 4.5 to 5.5 ohms. Sonnax notes that each of the seven low-flow circuits also has a signal accumulator piston behind it, so a worn bore can mimic a bad solenoid.
Do not buy a solenoid for shudder alone. GM Service Bulletin 18-NA-355 covers a 25 to 80 mph rumble-strip shudder on these transmissions and calls it TCC shudder caused by the fluid, not a failed part; the repair is a complete flush to Mobil 1 Synthetic LV ATF HP. If your truck has never had that flush, start there. When a code is present, scan commanded versus actual TCC slip, check resistance at the solenoid, and inspect the harness connector for fretting. Our 8L90 and 8L45 solenoid symptoms guide walks through the electrical checks, and 8L90 common problems and fixes explains the shudder bulletin and the valve body pressure issues that also cause lock-up complaints.
The listing covers 8L45, 8L90 and 8L50 units in 2014-2025 GM trucks, SUVs and performance cars, and cross-references GM numbers 24272280, 24272281, 24272282, 24272846, 24274844 and 24273239. GM uses position-specific solenoids with different flow calibrations, and it revised valve body parts over the years, including a 2019 control valve and solenoid change. Before ordering, pull the old solenoid and compare the number on its body to this listing, or send us your year and VIN and we will check it. A new-condition alternative is our 8L90 TCC lock-up solenoid for 2017-up, and the full range of parts is in the 8L90 and 8L45 collection.
| Fits | 8L45 2014-25 |
| Part type | Tcc Solenoid |
| Condition | Remanufactured |
| Brand | OEM |
| Reference | 24044716 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
The listing covers both, plus the 8L50, for 2014-2025 GM applications. Because GM uses position-specific solenoids, compare the number on your old solenoid to reference 24044716 and the cross-references on this page, or send us your year and VIN.
Usually not. GM bulletin 18-NA-355 traces that shudder to the fluid and fixes it with a full flush to Mobil 1 Synthetic LV ATF HP. Replace the solenoid when you have a TCC code or a converter that will not lock after the flush.
Use a DEXRON HP licensed fluid such as Mobil 1 Synthetic LV ATF HP. Older-specification fluids are not approved for these eight-speeds.
Yes. Clear the codes and run the transmission adaptive learn so the control module relearns lock-up apply.
Replace the pan gasket and filter, inspect the internal harness and connectors, and consider the matching solenoids if the valve body has high mileage or burnt fluid.
