4L65E Tcc Solenoid 1993-02, remanufactured and ready to install. Fits the 4L65E. Ships fast from the USA.
This listing is for the early 4L60E-family valve body, the one used up through the 2002 model year, which covers the first two years of the heavy-duty 4L65E in 2001-2002 Silverado, Sierra, Tahoe, Yukon, Suburban and Avalanche trucks with the 6.0L. Buyers usually land here because the converter will not lock on the highway, the truck shudders at 40-60 mph, or a P0741 keeps coming back. It is sold under the TCC solenoid name, but the photo shows a five-piece solenoid set: two box-style shift solenoids, two pencil-style solenoids of the type the 4L60E family uses for 3-2 control and TCC PWM duty, and the round early-style pressure control solenoid. That makes it a full valve body solenoid refresh rather than a single coil.
The 4L65E shares the 4L60E valve body layout, so lockup is handled the same way. When the PCM sees warm fluid, light throttle and a steady road speed, it energizes the TCC circuit, the converter clutch valve strokes, and the converter clutch clamps the engine to the turbine shaft. On units with PWM lockup, the pencil solenoid ramps that apply so it feels like a gentle drop in RPM instead of a bump. All of these solenoids live on a regulated feed from the actuator feed limit (AFL) valve, which Sonnax describes as stepping line pressure down to a steady solenoid supply. That matters because a worn AFL or TCC regulator bore can mimic a bad solenoid perfectly.
Plug in a scan tool and watch TCC command against slip RPM at steady cruise. If lockup is commanded and slip stays high, check the electrical side first: GEARS Magazine lays out a resistance and current-draw method that catches a solenoid that ohms out fine but will not pull in under load. A clean circuit with high slip points to hydraulics, and Sonnax names TCC regulator valve bore wear as a primary cause of P1870 and overheated converters in this family. Our 4L65E common problems guide walks through that path, and the 4L65E shift solenoid guide covers the shift-side codes that often show up with it.
The listing is marked 1993-02. The 4L65E itself only exists from the 2001 model year, so on a 4L65E this set is for 2001-2002 trucks; earlier years are 4L60E applications using the same early valve body style. The break that matters is 2003, when GM moved to a new casting and a late-style pressure control solenoid. Sonnax lists the 4L65E on the GM049 casting for 2000-2002 and the GM051 casting from 2003, so a 2003-up truck will not take the round early pressure control solenoid shown here. On the early units the on/off TCC solenoid is usually carried on the internal wiring harness, so compare the photo with what is bolted to your valve body. If you have a 2003 or newer truck, use the 2003-2006 TCC solenoid set instead. Not sure? Send us your year and VIN before ordering. The rest of the parts for this unit are on the 4L65E parts page.
| Fits | 4L65E 1993-02 |
| Part type | Tcc Solenoid |
| Condition | Remanufactured |
| Brand | GM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
The photo shows five pieces: two box-style shift solenoids, two pencil-style solenoids and the round early-style pressure control solenoid. If you need the contents confirmed against your valve body, send us your year and VIN before ordering.
No. GM changed to a new valve body casting and a late-style pressure control solenoid for 2003. A 2003 or newer 4L65E needs the late-style set.
The 4L65E uses the same early valve body and solenoid style as the 4L60E up through 2002. On a 4L65E this set fits 2001-2002; the earlier years are 4L60E applications.
Often not by themselves. Sonnax ties P1870 in this family mainly to a worn TCC regulator valve bore. Test the solenoid circuit first, and if it is good, look at the valve body.
Refill with Dexron VI ATF and check the level hot. Clear codes afterward, and reset adapts if your scan tool supports it, then drive at steady cruise to confirm lockup.
