Nine-piece 4L60E solenoid kit with shift A/B, TCC, PWM, EPC and 3-2 solenoids plus harness, filter and gasket for 1993-2002 GM units.
Owners of 1993-2002 Chevrolet and GMC trucks and SUVs with the 4L60E usually land here for one of three reasons: the truck launches in second, the dash shows a string of solenoid codes, or the converter will not lock at highway speed. On a transmission this age, the solenoids and the internal harness have spent decades soaking in hot fluid, and the plastic connectors get brittle. This nine-piece kit renews the whole electrical side of the valve body in one pan drop: the 1-2/3-4 (A) and 2-3 (B) shift solenoids, the TCC on/off solenoid, the TCC PWM solenoid, the EPC pressure control solenoid, the 3-2 downshift control solenoid, the internal wiring harness, a pan filter and a pan gasket.
The early 4L60E is a two-shift-solenoid design. ATRA's GEARS solenoid chart lists the pattern: A and B both on for first, only B on for second, both off for third, only A on for fourth. Because each gear depends on the pair, a dead B solenoid does not just lose one shift, it changes which gear the valve body defaults into. Around those two, the EPC solenoid sets line pressure by varying current, the TCC solenoid opens the converter clutch circuit, the PWM solenoid feathers the apply so lockup is smooth, and the 3-2 solenoid controls how quickly the 3-4 clutch lets go while the 2-4 band comes on during a downshift. Sonnax notes all of these are fed from the AFL valve at roughly 115 psi, so one leaking solenoid O-ring can drag the whole circuit down.
Check the electrical side from the outside first. ATRA Technical Bulletin 269 maps the case connector for these early units: the A solenoid between pins E and A and the B solenoid between E and B, each about 20-40 ohms, with the pressure control solenoid on C and D at 3.5-8.0 ohms. If a reading is open or changes when you flex the connector, the fault is under the pan and this kit covers it. ATRA Bulletin 583 also traced combinations of P0740, P0753, P0758, P0785 and P1860 to a single poor crimp on circuit 1020, which is the strongest argument for replacing the harness along with the solenoids. If every reading is in spec, do not throw parts at it: our 4L60E shift solenoid testing guide covers the next steps, and the P0748 pressure control solenoid guide explains EPC diagnosis.
This kit is built for the GM 4L60E from 1993 through 2002, the earlier case-connector and harness style. The listing also names the 4L65E and 4L70E, which share the valve body family. It is not for 2003-up units, which use a different harness. Within 1993-2002 there were running changes, and not every valve body uses every solenoid in the set, so match the part numbers on your old solenoids and harness to the cross references listed for this kit, or send us your year and VIN and we will check before it ships. All of our 1993-2002 parts are grouped on the 4L60E parts page.
If your EPC was the only failed part, the separate 4L60E pressure control solenoid is a cheaper fix, and a lone downshift complaint may only need the GM 24212327 3-2 shift solenoid. If the pan shows burnt clutch material, step up to the 4L60E Banner rebuild kit for 1992-2003 instead.
| Transmission | GM 4L60E (also 4L65E, 4L70E per listing) |
| Model years | 1993-2002 |
| Piece count | 9 |
| Includes | Shift A and B solenoids, TCC solenoid, TCC PWM solenoid, EPC solenoid, 3-2 control solenoid, internal harness, filter, pan gasket |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. This kit is for 1993-2002 4L60E units with the earlier harness. 2003 and later transmissions use a different harness and connectors, so choose one of our 2003-up solenoid kits instead.
Most of the solenoids and the harness can be changed with the pan and filter off and the valve body in place. Some solenoids are easier to reach with the valve body lowered. If you remove it, keep the check balls in place and torque the bolts to factory spec.
Rarely. Two or more solenoid circuit codes at once usually means a harness or connector fault on the shared power feed. ATRA documented exactly this on 4L60E units. Since this kit includes a new harness, it covers both possibilities.
Use Dexron VI ATF. It is the current GM-approved fluid and replaces earlier Dexron specs for these transmissions. Check the level hot, in park, on level ground.
Clear the codes, then drive gently through all four gears so the computer can adapt shift timing and pressure. A scan tool relearn is not required on most 1993-2002 trucks, but shifts may feel slightly firm or soft for the first few drives.
It can be. GM made running changes during 1993-2002 and not every valve body uses every solenoid in the kit. Compare each new part to the one you removed before installing it.
