All seven 4L60E solenoid parts plus the pressure switch manifold, internal harness, filter and pan gasket for 2003-2005 GM M30/M32 units in one pan drop.
If your 2003, 2004 or 2005 Silverado, Sierra, Tahoe, Yukon, Suburban or GM van with the 4L60E is stuck in limp mode, flaring on the 1-2 shift, refusing to lock the converter, or storing P0753, P0758, P0748 or P0740, the fix often turns out to be more than one part on the valve body. This kit is built around that reality. It carries all seven solenoid-side parts for 2003-2005 M30 and M32 units, including the transmission fluid pressure manifold switch, along with the internal harness, a pan filter and a pan gasket.
Every solenoid in this transmission works on oil that has already been regulated. Sonnax explains that the actuator feed limit (AFL) valve holds that feed at roughly 115 psi in the 4L60-E and sends it to the shift solenoids, the pressure control solenoid, the TCC solenoid and the 3-2 control solenoid. The computer then switches shift solenoids A and B to select gears, varies the EPC solenoid to set line pressure, uses the TCC on/off solenoid to enable lockup and the TCC PWM solenoid to feather it on, and fires the 3-2 solenoid to time the downshift. The seventh part, the pressure manifold switch, is the computer's only way of knowing which range the selector is in. When it leaks or a contact fails, the computer works from bad information and shifts erratically, which is why the switch belongs in the same job as the solenoids.
A cluster of solenoid codes at once is not proof that every solenoid died together. ATRA Technical Bulletin 583 traces P0740, P0753, P0758, P0785 and P1860 on 4L60E and 4L80E units to a poor crimp on one terminal of the shared solenoid feed circuit, and Bulletin 1244 covers limp mode with solenoid codes on these same transmissions. Check that feed and the case connector pins first. Our shift solenoid A and B code guide covers the circuit checks, and the TCC solenoid and P0740 guide handles the lockup side. If the wiring tests good and the solenoids still read out of spec, this kit is the right repair.
Listed fitment is 2003-2005 GM 4L60E and 4L65E (RPO M30 and M32). The listing cross-references 24230298, 24215111, 24219581, 10478112, 10478120, 10478131, 8677314, 8684216, 24220158, 24209121, 24203101, 8683187, 24208576 and 24212690, and the solenoid bodies are stainless steel. Solenoid layouts and connectors changed across 4L60E model years, so hold your old harness and pressure switch next to the product photos before ordering. If you are unsure, send us your year and VIN and we will confirm it. The rest of the lineup for this transmission is on the 4L60E parts page.
While the pan is off, look closely at what the old filter caught. Burned friction material means the 3-4 clutches are already going, and a 3-4 Z-PAK clutch pack belongs on the list. If you end up separating the valve body, a new valve body spacer plate with gaskets is worth having on hand; match it to your unit first.
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Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It is listed for 2003-2005 GM 4L60E and 4L65E (M30 and M32) transmissions, found in half-ton Silverado and Sierra pickups, Tahoe, Yukon, Suburban and other GM trucks, SUVs and vans of those years. Match your harness and pressure switch to the photos, or send us your year and VIN.
Shift solenoid A, shift solenoid B, the 3-2 downshift solenoid, the EPC pressure control solenoid, the TCC PWM solenoid, the TCC on/off solenoid and the transmission fluid pressure manifold switch. The internal harness, pan filter and pan gasket are included as well.
Not necessarily. ATRA has documented a single bad terminal crimp on the shared solenoid power circuit setting a whole string of codes on the 4L60E. Check the feed circuit and connector pins first. If the wiring is good and the solenoids test out of spec, replace them as a set.
Yes. Clear the codes and run the adaptive shift relearn with a scan tool. Without it the computer keeps adapts learned around the worn parts, which can leave shifts harsh or soft.
Dexron VI ATF. Check the level with the transmission at operating temperature after the job.
