Remanufactured 4L60E master solenoid kit with EPC, TCC PWM, 3-2 control, shift solenoids, pressure switch manifold and internal harness for 1993-2002 GM.
On a 1993-2002 GM pickup, SUV, van or rear-drive car with the 4L60E, the problems that point to the electrical side are familiar: firm-to-violent shifts, a converter that never locks or shudders when it does, a truck that takes off in 2nd, or a check engine light with solenoid codes that keep coming back after a single-part repair. This remanufactured master kit replaces everything that plugs into the internal harness at once - the EPC pressure control solenoid, the 1-2 and 2-3 shift solenoids, the 3-2 downshift control solenoid, the TCC on/off solenoid, the TCC PWM solenoid and the pressure switch manifold - and it includes the internal harness and case connector, so nothing new gets plugged into a brittle old harness.
In the early 4L60E the computer runs the transmission through these seven electrical parts. The 1-2 and 2-3 shift solenoids are on/off valves whose combined states select the gear. The pressure control solenoid takes a varying current signal and turns it into a line pressure command, so when its screen clogs or its armature wears, shifts go harsh or soft no matter what the throttle is doing. The TCC on/off solenoid applies the converter clutch and, from 1995 on, the PWM solenoid modulates that apply so lockup feels smooth. The 3-2 solenoid times the downshift on coast and kickdown, and the pressure switch manifold tells the computer which range the manual valve is in.
Read the codes and the freeze-frame data first. ATRA Bulletin 583 documents a poor crimp on the shared solenoid feed circuit that can set P0740, P0753, P0758, P0785 and P1860 together on these units, which is a wiring repair rather than proof that every solenoid is bad. Unplug the case connector and measure each solenoid at the pins: Bulletin 269 lists 20-40 ohms for each shift solenoid and 3.5-8.0 ohms for the pressure control solenoid. Out-of-range or shorted readings, or more than one weak circuit, make this kit the sensible fix. Our EPC pressure control solenoid guide covers the harsh-shift side, and the 3-2 downshift solenoid and P0785 guide explains how to separate a solenoid fault from a broken 3-2 control valve spring, which Sonnax notes can cause a 3-2 bind.
The kit is listed for 1993-2002 4L60E transmissions in Chevrolet, GMC and Cadillac vehicles, including C/K 1500 and 1999-2002 Silverado and Sierra 1500 pickups, Tahoe, Yukon, Suburban, S10, Sonoma, Blazer, Jimmy, Astro and Safari vans, Camaro and Corvette. GM changed the solenoid package twice inside this range. The 1993-1994 units had no TCC PWM solenoid and used a PWM-type 3-2 solenoid; 1995 added the TCC PWM solenoid; and from 1996 the 3-2 solenoid became an on/off type. That makes 1996-2002 the closest match, while a 1993-1995 owner should compare the 3-2 solenoid and every connector against the parts in the pan before installing. Reference numbers for this kit include 10478112, 10478120, 10478131, 24230298, 24215111, 24219581, 24212327 and 8683187. Send us the VIN if anything looks different, and see all 4L60E transmission parts for other years. 2003 and newer trucks use a different harness and need the 2003-up master solenoid kit.
| Fits | GM 4L60E, 1993-2002 (Chevrolet, GMC, Cadillac) |
| Includes | EPC, 1-2 and 2-3 shift, 3-2 control, TCC and TCC PWM solenoids, pressure switch manifold, internal harness |
| Condition | Remanufactured |
| Weight | 2.61 lb |
| Package Dimensions | 11.85 x 10 x 4.84 in |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Check before installing. 1993-1994 4L60E units had no TCC PWM solenoid and used a PWM-type 3-2 solenoid, while this kit follows the later layout. Compare the 3-2 solenoid and connectors in your pan to the photos, or send us your VIN.
No. GM changed the internal harness and solenoid connectors for 2003. Use the 2003-up master solenoid kit instead.
After years in hot fluid the factory harness insulation gets hard and cracks, and the pressure switch manifold diaphragms can leak. Replacing them with the solenoids stops the intermittent codes that a single-part swap leaves behind.
No. This is a remanufactured kit, which is how it covers every solenoid, the pressure switch manifold and the harness for less than buying new pieces individually.
Dexron VI ATF. It is backward compatible with the earlier Dexron fluids specified for 1993-2002 4L60E transmissions.
Clear the stored codes, reset the transmission adaptive values if your scan tool supports it, and road test through all four gears and a converter lockup before calling the job done.
