6L80 Tcc Solenoid 2010, remanufactured and ready to install. Fits the 6L80. Ships fast from the USA.
Read this first: the listing name says TCC solenoid, but the part that ships is a complete remanufactured 6L80/6L90 valve body assembly for 2010 and later units, the casting shown in the photos. Each one is vacuum tested and dyno tested before it leaves. If you landed here because your 2010-up Silverado, Sierra, Tahoe, Yukon, Suburban, Escalade or Camaro shudders at cruise, will not hold converter lockup, or shifts hard with solenoid performance codes, this is the piece that controls all of that hydraulically. A worn bore in the TCC regulator circuit produces exactly the symptoms people blame on the TCC solenoid itself.
The 6L80 has no conventional bolt-in TCC solenoid you can buy and swap. The solenoids sit in the TEHCM, the combined computer and solenoid body that bolts to the valve body. Those solenoids only make small signal pressures. The valve body turns them into real work: the TCC regulator valve sets converter clutch apply pressure, the clutch regulator valves feed each of the five clutches, and the actuator feed limit valve sets the supply pressure every solenoid works from. When those aluminum bores wear, the TEHCM commands the right thing and the hydraulics deliver the wrong thing. Sonnax notes that a worn actuator feed limit bore alone can cause solenoid performance codes, clutch failure, wrong gear starts and both harsh and soft shifts.
Start with the fluid. Old, broken-down Dexron VI causes more 6L80 converter shudder than any hard part, so a fluid exchange is the cheap first test. Next, watch commanded versus actual TCC slip on a scan tool at a steady cruise. Slip that wanders while the command holds steady points at regulation in the valve body, not at the converter lining. If you have stored solenoid codes, our 6L80 shift solenoid symptoms guide separates a failed TEHCM from a worn valve body, and the 6L80 common problems guide covers the shudder and pressure patterns in more depth.
This assembly is listed for 2010 and later 6L80 and 6L90 transmissions. Fit is not universal across those years, and GM is clear about why. Its bulletin 16-NA-130 says upper valve bodies are unique by transmission RPO: MYA, MYB, MYC (6L80) and MYD (6L90). Each upper body has four posts lettered A through D, and the one milled off identifies the RPO. Install the wrong one and the oil feeds to the center support and the speed sensor locations do not line up, leaving you with no reverse, no second, and missing ISS and OSS signals. Check the RPO on the glovebox or door sticker, compare the milled post on your old body, and send us your year and VIN before ordering so we can confirm the match. More options are in our 6L80 parts collection.
The valve body comes out from under the vehicle with the pan, filter and TEHCM. Keep the TEHCM clean and handle it by the edges, then bolt it to the new body. Replace the filter and its case seal, since GM calls for a new seal any time the filter is removed. Refill with Dexron VI using the check plug procedure at the correct temperature; a 6L80 fill adapter makes that much easier on a unit with no dipstick. Afterward, reset transmission adapts and run a fast learn with a capable scan tool before you judge shift or lockup quality. If you would rather repair your own casting, the Sonnax TCC regulator valve kit addresses the converter circuit only.
| Fits | 6L80 2010 |
| Part type | Tcc Solenoid |
| Condition | Remanufactured |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. Despite the listing name, this is a remanufactured 6L80/6L90 valve body assembly for 2010-up units. The 6L80 TCC solenoid lives inside the TEHCM and is not serviced as a loose part, but the valve body holds the TCC regulator valve that actually applies the converter clutch.
It fixes shudder caused by worn TCC regulation or feed pressure in the valve body. Shudder from degraded fluid is fixed with a fluid exchange, and a damaged converter lining needs a converter. Check fluid and commanded versus actual slip first.
The photos show the valve body casting assembly. Plan to transfer your existing TEHCM unless we confirm otherwise for your order. A replacement TEHCM must be programmed to the vehicle.
Upper valve bodies are specific to the transmission RPO (MYB, MYC or MYD). Check the milled A-D post on your old body and the RPO on your vehicle sticker, then send us your year and VIN so we can confirm before it ships.
Dexron VI, filled through the check plug at operating temperature. Afterward reset transmission adapts and complete a fast learn with a scan tool so the TCM relearns clutch fill and TCC control.
