6T30 Solenoid Kit, remanufactured and ready to install. Fits the 6T30. Ships fast from the USA.
The 6T30 is the lightest-duty member of GM's small front-drive six-speed family, built for small four-cylinder cars such as the Chevrolet Cruze and Sonic. When one starts dropping gears, flaring between shifts or engaging late, the fault often traces to the solenoids in the control module. This remanufactured kit replaces all seven, which lets you repair the module you have instead of buying and programming a new one.
GM's service bulletins treat the 6T30, 6T40, 6T45 and 6T50 as one design, and the controls are shared. There is no solenoid pack under the pan. The solenoids plug into the TEHCM, a single assembly that combines the transmission control module and the solenoid body, bolted to the valve body behind the case side cover.Six variable pressure control solenoids set line pressure, apply the converter clutch, and feed the regulator valves for the 3-5-R, low-reverse/4-5-6, 2-6 and 1-2-3-4 clutches. A seventh on/off solenoid shifts the clutch select valve. A 6T30 is clutch-to-clutch, so the timing between one clutch letting go and the next taking hold comes entirely from these parts.
Start with the cheap checks. A low fluid level makes a healthy 6T30 flare, and a failing speed sensor can confuse shift timing; our speed sensor symptoms guide shows how to separate the two. Then look at the codes. Pressure switch codes P0873 and P0878 only exist on Gen 1 controls, and GM removed the switches for Gen 2, so on an early unit those codes can point to a switch rather than a solenoid. GM's PI0670A also notes that the scan tool's TEHCM performance test does not work on Gen 1 controls, so a bench check is the reliable route: remove the module and measure each solenoid. The solenoid testing guide lists the resistance values and the air test.
No years are attached to this listing; the set is catalogued for the 6T30/6T40/6T45/6T50 family, with a long list of GM applications at home and overseas. For a small car the detail to watch is the control generation. PI0604C says most 2012 models moved to Gen 2, but the 2012 Cruze and Sonic with the 1.8L engine kept Gen 1 controls, and every 2013 covered vehicle is Gen 2. Read the eighth digit of the TEHCM identifier: 1, 2 or 3 is Gen 1, B, C or D is Gen 2. PCS2 and PCS5 move and reverse their normal state between generations, so compare each new solenoid with the old one in the same bore. Send us your year and VIN if you want us to check. A dated alternative is the 2010-2012 6T30 solenoid kit.
If the 3-5-R clutch or another pack is already burned, solenoids will not bring it back. A 6T30 clutch module or the 2013-2018 6T30 overhaul kit belongs on the same order.
| Fits | 6T30 |
| Part type | Solenoid Kit |
| 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.
GM shares the control design across the 6T30, 6T40, 6T45 and 6T50, and this set is catalogued for the whole family. What has to match is your module generation, so check the TEHCM ID digit before installing.
Not necessarily. The 2012 Cruze 1.8L kept Gen 1 controls, which still have pressure switches, and P0878 is a pressure switch circuit code. Inspect the switch and its circuit before replacing solenoids.
No. The point of this kit is to keep your existing TEHCM. Because the module stays the same, no programming is required; clear adapts and road test afterward.
Only the on/off shift solenoid. Applying 12 volts to the pressure control solenoids can damage them. Use an ohmmeter, a solenoid driver, or a low-pressure air test.
Dexron VI. Set the level with the transmission hot at the level plug.
