Remanufactured 10-solenoid set for the GM 9T50 nine-speed in 2.0L Equinox, Terrain, Malibu, Blazer, Envision and Regal - fixes harsh or erratic shifts.
A 2.0L turbo Equinox, Terrain or Malibu that slams the 1-2 or 2-3 upshift, clunks as it coasts to a stop, or flares between gears is very often telling you its 9T50 solenoids are worn. This is a complete ten-solenoid set for that nine-speed, remanufactured with each solenoid cleaned, inspected and tested before it is packed. It is referenced to GM numbers 24046408, 24043757, 24293253 and 24045659 and replaces the shift and pressure control solenoids that live in the transmission's solenoid control valve body.
The 9T50 is GM's front-drive nine-speed, built in 9T45, 9T50, 9T60 and 9T65 versions. It has two valve bodies: a main control valve body and a separate solenoid control valve body that carries the solenoids. The computer sends current to each solenoid, and the solenoid turns that into a regulated oil pressure that fills and releases a specific clutch. Nine forward gears means a lot of clutch-to-clutch shifts, and every one of them depends on two solenoids handing off pressure at exactly the right moment. A solenoid that sticks on varnish or loses coil strength makes that handoff late or early, and the result is a bang, a flare or a slip.
There is a second wear point in the same area. Each solenoid is held in its bore by a spring retainer, and Sonnax documents that these OE retainers collapse with age, leaving the solenoid loose and crooked in the bore. That is why a 9T50 solenoid job should always include a look at the retainers, and Sonnax sells a stabilization clip insert that works with the OE retainer.
Start with a scan tool that reads the transmission module and shows the full code list. Electrical codes mean checking connector pins and coil resistance first, which our solenoid multimeter test explains. Performance or pressure codes on a 9T50 can also come from worn valve body bores, so if the solenoids test good, the valve body itself is the next suspect. Sonnax makes a Zip Kit that reseals those circuits on the bench, and when the unit is badly worn a complete 9T50 valve body with internal harness is the quicker fix. A bidirectional scanner lets you command each solenoid and is worth the money if you work on these; see our scan tool guide.
This set is listed for the 2.0L versions of the 2018-up Chevrolet Equinox and GMC Terrain, 2019-up Chevrolet Blazer, 2020-up GMC Acadia, 2017-2022 Chevrolet Malibu, 2018-2020 Buick Regal and 2019-2023 Buick Envision. The engine must be the 2.0L and the transmission must be the 9T50; the 1.5L Equinox and Malibu use a different transmission. GM changed solenoid designs during the run, so match the numbers on your old solenoids to the list above, or send us your year and VIN. If your transmission is a 9T65 behind a V6, see the 9T65 pressure solenoid kit instead.
If the fluid is dark and smells burnt, a pressure fault has probably already damaged clutches; plan for a rebuild rather than solenoids alone.
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No. The 1.5L cars use a different transmission. This set is for the 2.0L turbo models with the 9T50 nine-speed only.
Replace the set. The other solenoids have the same miles in the same fluid, and doing one at a time usually means pulling the pan and valve body again later.
GM specifies DEXRON VI for the 9T50. A drain and fill takes roughly 5.3 to 6.3 quarts; verify the level with the factory check procedure.
Yes. Clear codes and perform the transmission adaptive relearn with a scan tool that supports GM transmission functions, or shifts may stay harsh until it adapts.
Worn valve body bores and collapsed solenoid retainers are common 9T50 causes. Check the retainers first; a valve body reseal or a complete replacement valve body addresses the bore wear.
