4L60E/4L80E TCC PWM Lockup Solenoid, GM 24227792

GM Genuine Parts number 24227792 is the pulse-width-modulated (PWM) torque converter clutch solenoid used across the late GM 4L60E family and the 4L80E. It is the electro-hydraulic valve that meters fluid to apply and release the converter lockup clutch. Instead of the older on/off TCC solenoid, the PWM valve ramps apply pressure so lockup engages smoothly under computer control rather than slamming in. Confirm it by GM part number 24227792 for your application.

This is the solenoid to reach for when you set a P0741 (TCC circuit stuck off) or P0742 (TCC circuit stuck on). A stuck-off code shows up as no fourth-gear lockup, converter shudder, and 200 to 300 rpm of float on the highway; a stuck-on code shows up as the engine trying to stall when you come to a stop with your foot on the brake. Both trace back to a worn or contaminated PWM valve or debris in the bore.

On the bench or in the pan the solenoid lives on the valve body / side cover and is held by a retaining clip. It is spring-loaded, so keep a thumb on it while you pull the clip or it will launch and drop the internal valve into the channel. Because a failing TCC solenoid usually means the fluid is worn and the shift solenoids are the same age, most techs replace it during a full fluid, filter and gasket service and change the 3-2 shift solenoid at the same time.

Fits GM 4L60E, 4L65E and 4L70E (2003-up wiring), 4L80E and 4L85E, and 4L30E applications that call for the PWM TCC solenoid. Metal body, machined finish, built to GM OE specification. Ships from the USA, handling in 1-2 business days.