Six solenoids, internal harness, filter and pan gasket for 2003-2005 GM 4L60E and 4L65E: fixes slipping, no lockup and P0753/P0758 codes in one pan drop.
If your 2003-2005 Silverado, Sierra, Tahoe, Yukon, Escalade, S10, Blazer or Rainier is setting P0753, P0758, P0740, P0796 or P1860, starting in the wrong gear, refusing to lock the converter, or banging into gear, the fault is very often on the electrical side of the valve body. This kit lets you renew that whole side, plus the filter and pan gasket you need anyway, so the pan comes off once. It covers the 2003-2005 4L60E and the heavier 4L65E and 4L70E that share the same valve body layout.
The 4L60E picks its gear with only two on-off shift solenoids. Shift solenoid A (1-2) and shift solenoid B (2-3) are both on in first, B alone in second, both off in third and A alone in fourth. Because every gear depends on that pair, one weak coil can knock out two gears at once. The EPC solenoid sets line pressure from throttle and load, the TCC solenoid opens the lockup circuit, and the 3-2 solenoid times the 3-4 clutch release against the 2-4 band apply on downshifts. The internal harness ties them all to the case connector, and it lives in hot fluid for its whole life. In this box you get shift A and B, EPC, TCC, two 3-2 downshift solenoids as packaged, the harness, a filter and a pan gasket.
Pull codes and freeze frame first. With the case connector unplugged, measure each circuit from the outside: ATRA's bulletin on these units puts the shift solenoids at roughly 20-40 ohms. A circuit that is open, shorted or jumps around as you wiggle the connector tells you the problem is inside the pan. ATRA also documented 4L60E units setting any combination of P0740, P0753, P0758, P0785 and P1860 from one poor terminal crimp on a shared feed circuit, which is exactly why a fresh harness belongs in the job. Our shift solenoid A and B guide for P0753 and P0758 walks through the tests, and the TCC solenoid and P0740 guide covers lockup faults. If the electrical side tests good and the unit still slips or flares, the cause is more likely mechanical, such as burnt 3-4 clutches or a stripped sun shell; see our 4L60E common problems guide before spending money on solenoids.
The listing fits GM 4L60E, 4L65E and 4L70E transmissions from 2003-2005. It does not fit the 1993-1996 early valve body. GM made running changes in this family, so lay the old solenoids and harness next to the new ones and compare connector shape, harness routing and solenoid style before you install anything. Cross-references listed are 24230298, 24208576, 24225815, 10478120, 10478131 and 24207379. If you are not sure, send us the year and VIN and we will check it. Other 4L60E parts are on our 4L60E parts page.
Drain and drop the pan, pull the filter and look at what is in the pan: fine gray paste is normal, but heavy friction material or metal flakes mean the unit needs more than solenoids. Unplug the harness at the case pass-through and at each solenoid, then remove the retaining clips and bolts. Note which bolt came from which hole, since lengths differ. Lube every new O-ring with ATF so it does not roll or cut going into its bore, route the new harness exactly as the old one ran, and tighten bolts evenly to service manual spec. Fit the new filter and gasket, refill with Dexron VI, check the level hot, clear codes and drive through several full shift cycles so the computer relearns. If the valve body bores are worn, a complete 4L60E valve body with solenoids and harness is the better repair. If a downshift problem persists, the separate GM 24212327 3-2 shift solenoid is available on its own.
| Fits | GM 4L60E / 4L65E / 4L70E, 2003-2005 |
| Solenoids | Shift A and B, EPC, TCC, two 3-2 downshift |
| Also includes | Internal wiring harness, filter, oil pan gasket |
| Replaces OE | 24230298, 24208576, 24225815, 10478120, 10478131, 24207379 |
| Not compatible | 1993-1996 early 4L60E valve body |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It is listed for 2003-2005 4L60E, 4L65E and 4L70E units, which includes 2004 Silverado 1500 trucks. Compare your old solenoids and harness connector with the new ones before installing, or send us the VIN and we will confirm.
The pan has to come off to reach the solenoids, and reusing an old filter and gasket invites leaks and restriction. Having them in the box means the job is finished in one pan drop.
Most solenoids come out with the valve body in place after removing their clips and bolts, but harness routing and some solenoids are easier with the valve body lowered. Keep bolts sorted by length if you remove it.
Use Dexron VI ATF. Check the level hot, in Park with the engine running, and top off in small amounts.
A slip or converter code after a good electrical repair usually points to valve body bore wear or worn clutches. A vacuum test of the valve body bores or a full inspection is the next step.
Clear the codes and drive through repeated light and moderate throttle shifts. If your scan tool can reset transmission adapts, do that first so the computer starts fresh with the new solenoids.
