Five-piece 4L60E solenoid set with EPC, shift A and B, TCC PWM and 3-2 control solenoids for 1993-2002 GM trucks, vans and cars.
Early 4L60E trucks are getting old enough that tired solenoids are a routine find. If your 1993-2002 C/K or Silverado 1500, Sierra 1500, Tahoe, Yukon, Suburban, S10, Blazer, Sonoma, Camaro or other 4L60E-equipped GM is shifting late, banging into gear, holding second, or setting P0748 or a shift solenoid code, this five-piece set covers the solenoids that control line pressure and shift timing on the early valve body: the EPC, shift solenoid A (1-2/3-4), shift solenoid B (2-3), the TCC PWM and the 3-2 downshift control. They use steel housings and ABS bodies, with O-rings and inlet screens already installed.
On these early units the computer reads throttle, speed and load, then switches shift solenoids A and B to move the shift valves, sets line pressure by varying current to the EPC, and uses the 3-2 solenoid to soften the downshift from third. ATRA's 1995 bulletin on 4L60-E solenoid resistances shows how they are wired through the case connector: the 1-2 and 2-3 shift solenoids share a feed and read 20-40 ohms, while the pressure control solenoid reads a much lower 3.5-8.0 ohms on its own pair of pins. That low EPC resistance is why it runs warm and is often the first solenoid to fade, which shows up as soft, slipping shifts or erratic firmness.
Measure the solenoids through the case connector against the values above before you spend money, and inspect the pins for corrosion. ATRA Technical Bulletin 583 also describes a bad crimp on a shared feed circuit setting several solenoid codes at once on these units. Be aware that solenoids are not always the answer: Transmission Digest documented a 1993 C1500 that started in second gear where new solenoids and then a whole valve body did not help, because the fault was elsewhere in the hydraulic and electrical system. Our 4L60E shift solenoid symptoms and testing guide covers the checks, and the EPC solenoid guide explains line pressure faults.
The listing fits GM 4L60E transmissions from 1993 through 2002 and also calls out the 4L65E and 4L70E. Early 4L60E valve bodies changed during this run, and not every year used every solenoid in this kit in the same form, so match the shape, connector and numbers on your old solenoids before ordering. The listing cross-references a long range of GM numbers including 10478112, 10478120, 24230298, 24215111, 24227792, 8683187 and 24212327. The TCC on/off solenoid, harness, filter and pan gasket are not included; if you want those in one box, look at the 1993-2002 master solenoid kit with harness, filter and gasket. Send us your year and VIN if you are unsure, and see the rest of the lineup on the 4L60E shop page. 2003-and-later units use different connectors and need a late-style kit.
If the valve body bores are worn or the 3-2 problems persist after new solenoids, a remanufactured 1996-2000 4L60E valve body is the next step. A harsh 3-2 that went on too long can overheat the band, so check it and consider a TCI high energy 2-4 band if it is glazed.
| Transmission | GM 4L60E (also 4L65E, 4L70E per listing) |
| Model years | 1993-2002 |
| Piece count | 5 |
| Includes | EPC solenoid, shift A and B solenoids, TCC PWM solenoid, 3-2 control solenoid |
| Material | Steel and ABS |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. It includes the EPC, shift A and B, TCC PWM and 3-2 control solenoids. The TCC on/off solenoid, harness, filter and pan gasket are sold separately or in our kit that bundles them.
The listing covers 1993-2002 4L60E units, but the early valve bodies changed during that run. Compare your old solenoids against these, or send us the year and VIN to confirm.
ATRA's 4L60-E bulletin lists the 1-2 and 2-3 shift solenoids at 20-40 ohms and the pressure control solenoid at 3.5-8.0 ohms, measured through the case connector.
Often, if a shift solenoid or its wiring is the cause. But a second-gear start can also come from wiring or hydraulic faults, so test the circuit before buying.
No. 2003-and-later units use different solenoid connectors. Choose one of our 2003-up kits instead.
