6L80 valve body for 2006-2017, Sonnax-updated and ready to install. Ships fast from the USA.
A 2006-2017 Silverado, Tahoe, Suburban, Camaro, Corvette, Sierra or Yukon that bangs into gear, flares between shifts, starts in the wrong gear, or sets a solenoid performance code usually has worn valve body bores before it has a burnt clutch. This valve body is remanufactured and updated with Sonnax valves in the bores that wear first on the 6L80, then function-tested, so it ships ready to hold the pressure the transmission was designed for.
The 6L80 is GM's 6-speed rear-wheel-drive electronic automatic. Its valve body routes line pressure through the pressure regulator, the clutch boost valve and a set of clutch regulator valves to apply the 1-2-3-4 clutch, the 3-5-R clutch, the 4-5-6 clutch and the bands in the right sequence, while shift and pressure control solenoids carried on the unit tell those valves when to move. Every one of those valves rides in a precision bore, and the boost valve sets how much the regulator valve raises line pressure under load.
Sonnax documents the clutch regulator valve bore plug leaking at its retainer as a direct cause of those performance codes, and a boost valve bore worn oversize lets line pressure drop under load even though the pressure regulator itself is fine. Our 6L80 valve body problems and testing guide covers how to tell a bore wear complaint from a solenoid or TEHCM fault.
Check line pressure at idle and under load if you can, and pull codes before assuming the valve body is bad. Low or inconsistent pressure that does not match a healthy pressure regulator points at bore wear in the clutch regulator or boost valve circuits. Burnt clutches from a complaint that has been running a while mean the valve body alone will not fix the shift, and the unit needs a rebuild behind it; our 6L80 common problems and fixes guide covers the clutch failures that pair with worn hydraulics.
This valve body covers 6L80 production from 2006 through 2017, across Chevrolet Silverado and GMC Sierra, Tahoe, Suburban, Yukon, Camaro and Corvette depending on year and trim. GM revised castings and solenoid packages over that span, so match your original unit's casting marks and connector before ordering, or send us your year, vehicle and VIN and we will confirm the correct version. Every 6L80 part we stock is on the 6L80 parts page.
Drop the pan and change the filter and fluid at the same time, refilling with Dexron VI, so debris already circulating from worn bores is not pulled straight into the corrected unit. Torque the valve body bolts in sequence to spec and run the transmission control module's adaptive relearn after the first drive. If end plugs or the boost valve bore in your old unit were already leaking badly, a 6L80 valve body rebuild zip kit is worth having on hand, and if clutch wear shows up alongside the hydraulic complaint, a 6L80 master rebuild kit with steels, frictions and filter covers the rest of the unit.
| Transmission | 6L80 |
| Year Range | 2006-2017 |
| Condition | Remanufactured / updated |
| Shipping | Ships from the USA |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Sonnax makes corrected replacement valves for the clutch regulator and boost valve bores that wear in production 6L80 valve bodies. This unit has those circuits corrected with Sonnax parts, so it holds line pressure like a new unit instead of leaking at worn bores.
If those codes trace to a leaking clutch regulator valve bore plug or worn boost valve bore, yes. If the solenoid itself has failed electrically, the solenoid needs to be replaced as well.
No. A valve body corrects the hydraulic circuits that apply the clutches, but burnt clutch material has to be replaced in a rebuild. Pair this with a master rebuild kit if the unit has been slipping for a while.
It covers that production span, but GM revised castings and solenoid packages over those years. Match your original unit's casting and connector before ordering, or send your year, vehicle and VIN and we will confirm fitment.
Line pressure at idle and under load, and the condition of the fluid and filter. Replace the filter and refill with Dexron VI at the same time so the corrected valve body is not immediately recontaminated.
