New EPC, shift, TCC PWM and 3-2 downshift solenoids for early GM 4L60E and 4L65E units, 1993 through 2002, with the early-style connectors.
Early 4L60E trucks are now twenty-plus years old, and a 1993-2002 Silverado, Sierra, C/K 1500, Tahoe, Suburban, S10, Blazer, Camaro or Firebird running its original solenoids is living on borrowed time. This 5-piece kit replaces every solenoid in the early valve body with new parts: the EPC pressure control solenoid, both shift solenoids, the TCC PWM solenoid and the 3-2 downshift control solenoid. It is the right buy when you have a solenoid code or a shift complaint, clean fluid, and no intention of dropping the pan twice.
The two shift solenoids (24230298) do the gear picking. The PCM turns them on and off in four combinations, one per gear, and the shift valves follow. The EPC solenoid (24203101) is a variable-force unit that sets line pressure; on these early units the PCM uses it in place of the throttle valve cable the older 700-R4 relied on. The TCC PWM solenoid (24227792) ramps converter clutch apply so lockup feels smooth instead of abrupt, and the 3-2 control solenoid (24212327) times the release of the 3-4 clutch against the 2-4 band on a forced downshift. All five are fed from the same regulated solenoid pressure circuit, so when that feed fluid is varnished and the coils have been heat-cycled for decades, they tend to drift out of spec together.
None of those, on their own, mean the clutch packs are gone. They mean the valve body is getting bad instructions or bad pressure.
Begin with the case connector and a meter. The ATRA resistance bulletin for this era lists the shift solenoids at roughly 20-40 ohms and the pressure control solenoid at about 3.5-8.0 ohms; anything open, shorted or far outside those ranges is an electrical fault inside the pan. If several solenoid codes appear at once, inspect the harness terminals before blaming every solenoid, because a single poor crimp on the shared feed can set all of them. Our 3-2 downshift solenoid and P0785 guide and the EPC solenoid guide explain both tests. Burned fluid or a pan full of friction material changes the plan to a rebuild.
This kit is for GM 4L60E and 4L65E transmissions from 1993 through 2002. The early units use a different solenoid connector than the 2003-on design, so the parts will not plug into a later harness. The earliest 1993-1994 valve bodies also differ in solenoid count, so check that your unit actually carries a 3-2 control solenoid. Compare the numbers above with the ones stamped on your old solenoids, or send us your year and VIN and we will confirm. Everything else we stock for this transmission is on the 4L60E parts page.
If only the 3-2 solenoid is bad and the others test well, the single GM 24212327 3-2 solenoid is the cheaper fix.
| Fits | GM 4L60E / 4L65E, 1993-2002 |
| Pieces | 5 |
| EPC solenoid | 24203101 |
| Shift solenoid | 24230298 |
| TCC / PWM solenoid | 24227792 |
| 3-2 downshift solenoid | 24212327 |
| Condition | All new parts |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. The 1993-2002 solenoids use an early-style connector that does not match the 2003-on harness. Later trucks need a 2003-up kit.
The kit cross-references 24203101 for the EPC pressure control solenoid, 24230298 for the shift solenoids, 24227792 for the TCC PWM solenoid and 24212327 for the 3-2 downshift control solenoid. All parts are new.
Some of the earliest valve bodies use a different solenoid layout. Check which solenoids are on your valve body before installing, and keep any part that does not have a home. Send us your year and VIN if you want us to confirm before ordering.
No, but they have aged together in the same fluid. Replacing all five during one pan drop avoids coming back for the next one to fail. If only one circuit tests bad and the vehicle has low miles, a single solenoid is a reasonable choice.
Dexron VI ATF. It is GM's current fluid for these transmissions and is backward-compatible with the earlier Dexron specifications.
