6L80 Valve Body 2009, remanufactured and ready to install. Fits the 6L80. Ships fast from the USA.
A 2009 Silverado, Sierra, Tahoe, Yukon, Suburban or Escalade with the six-speed 6L80 that slams into gear, flares on the 2-3 or 3-4, refuses reverse, or throws a clutch pressure control solenoid code is a strong candidate for a valve body. This listing is a remanufactured OEM 6L80 valve body for the 2009 model year, rebuilt and ready to bolt in, so you are not gambling on a used unit with the same worn bores you are trying to get rid of. It carries a 1-year warranty.
The 6L80 uses clutch-to-clutch shifting: five clutches (1-2-3-4, 3-5-Reverse, 4-5-6, 2-6 and Low/Reverse) are applied and released in overlapping pairs, with no bands and no one-way clutch doing the work on most shifts. Every one of those handoffs is timed by a pressure control solenoid feeding a clutch regulator valve in the valve body. The regulator valve and its boost valve set the actual pressure that reaches the clutch. When the bore around that valve wears, or an end plug starts leaking feed oil, the solenoid can be commanding exactly the right pressure while the clutch gets something else. That is why 6L80 shift complaints often survive a solenoid replacement.
Check the fluid level properly first. The 6L80 has no dipstick on most trucks; the level is set at the check plug with the engine running at the specified temperature, and running it low produces the same flares a worn valve body does. Then read the codes and watch the clutch pressure commands against shift times on a capable scan tool. Our 6L80 valve body problems and testing guide walks through which complaint matches which valve, and 6L80 common problems and fixes covers the converter shudder and fluid-related failures that get mistaken for a valve body.
This unit is for 2009 6L80 applications. GM Service Bulletin 16-NA-130 is the reason to check before bolting it in: upper valve bodies are unique by transmission RPO (MYA, MYB, MYC, MYD for the 6L45, 6L50, 6L80 and 6L90). The top of each upper valve body has four posts labeled A through D, and the milled post identifies its RPO; a 6L80 is MYC, so look for the C post milled off. Installing the wrong one can cause no reverse and no 2nd, and can misplace the speed sensors so ISS and OSS signals go missing. Confirm your RPO on the glovebox label and compare it to the posts, or send year, vehicle and VIN. Other years and versions are on the 6L80 parts page, including the 2010 valve body.
The valve body sits inside the pan with the TEHCM control module attached. Disconnect the vehicle harness at the case connector, drop the pan, and take the assembly out with the module. If the module is ever replaced, it has to be programmed to the vehicle with factory-level software. Install a new filter and seal; a fresh pan kit with drain plug and gasket makes the next service easier. Refill with Dexron VI through the fill port, using a manual ATF fill pump since there is no dipstick tube, then set the level hot at the check plug. Finish by running the transmission adapt reset and a road test so the module relearns clutch fill times.
| Fits | 6L80 2009 |
| Part type | Valve Body |
| 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.
Not without checking. GM makes upper valve bodies unique by RPO, and the 6L90 is MYD while the 6L80 is MYC. Look at the milled post on top of the upper valve body (C for 6L80) and match it to your RPO label.
The listing covers the valve body. Check your old assembly and send us your year and VIN if you are unsure what transfers. Any replacement TEHCM must be programmed to the vehicle with factory-level software.
Dexron VI. Fill through the fill port and set the final level hot at the check plug with the engine running, following the procedure for your vehicle; there is no dipstick on most 6L80 trucks.
Sometimes, but most 6L80 shudder starts with degraded fluid and the converter clutch. GM Service Bulletin 22-NA-182 covers the shudder procedure for this family. Do that diagnosis before buying a valve body for shudder alone.
Yes. Run the transmission adaptive learn reset with a scan tool and drive it through all gears so the module relearns clutch fill times. Shifts are often firm until the relearn finishes.
