9T50 Transmission Solenoid Kit 10-Piece for GM 2.0L

Owners usually find this page after a GM nine-speed starts acting up: a hard bang on the 2-3 shift, a pause before Drive engages on a cold morning, rpm hanging between gears, or a check engine light with pressure control codes like P0776 or P0796. This ten-piece kit replaces the pressure control and shift solenoids in the 9T-family solenoid control valve body. Every solenoid is remanufactured, cleaned and flow-tested against OE spec, and the set is cross-referenced to GM 24046408, 24043757, 24293253, 24045659, 24291625 and 24284174.

How pressure control works in the GM nine-speed

GM's transverse nine-speed is a family: 9T45 and 9T50 behind four-cylinder engines, 9T60 and 9T65 behind the V6. All of them shift clutch to clutch, meaning one clutch releases while the next one applies with no freewheeling element to cover a sloppy shift. The transmission computer controls those clutches through variable force solenoids that convert a current signal into a precise oil pressure. When a solenoid's spool wears or its filter screen loads up with debris, the pressure it delivers no longer matches what the computer asked for. The computer sees the mismatch as a pressure control performance fault, and the driver feels a late, harsh or flared shift.

Symptoms this kit addresses

• Banging or harsh 2-3 upshift
• Flare, where engine speed climbs during the shift before the next gear catches
• Delayed engagement into Drive or Reverse when the transmission is cold
• Stored pressure control codes such as P0776, P0796, P2723 or P2727
• Reduced-function operation after the computer detects a pressure fault

Diagnose it first

Pull every stored code and freeze frame before ordering anything. Codes describing an open or shorted circuit send you to the wiring and connectors first, and our guide to checking solenoid resistance with a meter walks through it. Performance codes with good circuits point to the solenoids or the valve body. Also check the fluid. If it is black, burnt-smelling or full of friction material, a slipping clutch has already been cooked and new solenoids alone will not fix it; at that point a full overhaul with new frictions and steels is the honest repair. A line pressure check, covered in our line pressure testing guide, helps separate a pump or regulator problem from solenoid control.

Fitment

The listing covers the 2.0L turbo Chevrolet Equinox 2018-up, Blazer 2019-up, Malibu 2017-2022, GMC Terrain 2018-up, Acadia 2020-up, Buick Regal 2018-2020 and Envision 2019-2023, plus the Buick LaCrosse 3.6L. Because GM revised the pressure solenoid design during production, match the numbers stamped on your old solenoids against the list above before ordering. Sonnax also notes the 9T50 came with two valve body styles, ETRS (electronic range select, with extra position switches and a park inhibit solenoid) and non-ETRS, so note which one you have. If you are unsure, send us your year and VIN and we will confirm it. For V6 applications, compare against our 9T65 ten-piece kit.

Installation points

• Drop the pan, remove the filter and unclip the internal harness from the solenoid body.
• Change solenoids one bore at a time. They are not interchangeable from position to position, so never pull them all at once.
• Check the spring retainers that hold each solenoid. Collapsed retainers let a solenoid sit crooked; reopen them or use a stabilization insert.
• Torque the retaining bracket screws to GM spec and make sure each harness clip snaps fully home.
• Refill with DEXRON VI, the fluid GM lists for its 9T transmissions, using a fill pump since there is no dipstick tube to pour into.
• Clear codes, perform the adaptive relearn with a scan tool, then road test through all nine gears.

Which GM nine-speeds does this kit fit?

It is listed for the 9T45, 9T50, 9T60 and 9T65 family. The vehicle list centers on the 2.0L turbo Equinox, Terrain, Malibu, Blazer, Acadia, Regal and Envision, plus the LaCrosse 3.6L. Match the numbers on your old solenoids or send your VIN.

Can I swap the solenoids around between bores?

No. Each solenoid controls a specific clutch circuit. Replace them one bore at a time so every new solenoid goes into the position the old one came from.

What codes usually lead to replacing this kit?

Pressure control solenoid performance codes such as P0776 and P0796, and related pressure control codes like P2723 and P2727, along with harsh 2-3 shifts and flare. Confirm the wiring is good first.

What fluid and relearn do I need afterward?

Refill with DEXRON VI and perform the transmission adaptive relearn with a scan tool that supports GM transmission functions before judging shift quality.

Will new solenoids fix a transmission with burnt fluid?

Usually not. Burnt fluid and friction debris mean clutches are already damaged. Solenoids fix the control problem but not worn clutch packs; plan for a rebuild in that case.

• How to Test a Transmission Solenoid with a Multimeter
• Checking Transmission Line Pressure
• Best Scan Tools for Transmission Work