6L80 Valve Body 2012, remanufactured and ready to install. Fits the 6L80. Ships fast from the USA.
If a 2012 Silverado, Sierra, Tahoe, Suburban, Camaro, or Escalade is bumping into gear, hunting on light throttle, or shuddering when the torque converter locks up on the highway, the 6L80's valve body is the part doing that work and the part most likely worn out. This listing is a remanufactured valve body built to the 2012 6L80 casting and connector spec, assembled and function-tested on a bench before it leaves, so the clutch regulator valves, boost valve, and bore plugs inside are already matched and verified rather than left for you to diagnose piece by piece.
Every clutch in the 6L80 - the 1-2-3-4, the 3-5-R, the 4-5-6 - gets its apply pressure from its own regulator valve inside this casting, each one fed and timed by a shift or pressure control solenoid under command from the transmission control module. A boost valve works alongside the pressure regulator to raise line pressure under load so the clutches do not slip, and the torque converter clutch gets its own apply and release circuit through this same assembly. When a bore wears or an end plug starts leaking, the clutch it feeds loses apply pressure before anything mechanical actually fails - which is why a bad valve body so often looks like a bad clutch pack until someone checks the hydraulics first.
Read the 6L80/6L90 3-5-R clutch failure guide if the symptom is specifically a loss of reverse or a 3-5-R flare, and the 6L80 shift solenoid symptoms guide if you want to rule out a solenoid before assuming the casting itself is worn.
Scan for codes before ordering. A single solenoid performance code can sometimes be fixed with just that solenoid; a spread of clutch pressure-control codes across more than one circuit, or a shudder that a fluid and filter service does not clear, points to bore wear in the valve body itself. Sonnax's technical writeup on 6L80/6L90 no-movement conditions is a good second check if your shop wants to confirm the diagnosis before replacing the whole assembly.
This valve body is built to the casting and connector count used in 2012 6L80 production. GM revised this transmission's valve body more than once over its production run, and a unit from a different year can bolt up but not seal correctly against an updated separator plate. Check your old unit's casting markings against this one before ordering, or send your year, vehicle, and VIN and we will confirm the correct match. The full lineup of 6L80 valve bodies and other parts by year is on the 6L80 collection page.
Service the fluid and filter in the same job - debris from the worn-out unit will otherwise recirculate into the new one on first startup. Use Dexron VI, follow GM's specified bolt torque sequence rather than a generic pattern, and let the TCM relearn shift adapts over several drive cycles after the swap, or reset adapts with a scan tool if one is available. Many shops pair this job with a clutch drum inspection and a seal and overhaul kit when the fluid came out already discolored, since that usually means some clutch wear happened before the valve body was replaced.
| Fits | 6L80 2012 |
| 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.
Yes, the shift and pressure control solenoids that mount to this casting ship installed and function-tested as part of the assembly.
Check the codes and fluid first. Clutch pressure-control codes with otherwise clean fluid usually point to the valve body; burnt fluid with the same slip usually means the clutch itself has already taken damage.
Not always. GM revised the casting and separator plate more than once during this run. Match your old unit's casting markings against this one, or send your year, vehicle, and VIN so we can confirm fitment before shipping.
A worn clutch regulator valve or leaking end plug in the valve body is a common cause of 3-5-R flare or slip, separate from physical drum or clutch pack wear - our 3-5-R clutch failure guide covers how to tell them apart.
Not required, but a scan tool reset of the shift adapts speeds up the relearn. Without one, the transmission control module relearns shift timing over normal driving within a few drive cycles.
