Tested refurbished solenoid set with internal harness for 2003-2007 GM 4L60E and 4L65E: EPC, TCC, TCC PWM, 3-2 and both shift solenoids in one swap.
A 2003-2007 Silverado 1500, Sierra 1500, Tahoe, Yukon, Suburban or Avalanche that suddenly holds 2nd or 3rd, refuses the 1-2 shift, bangs into gear, or will not lock the converter usually has a tired electrical package inside the 4L60E pan. This refurbished kit replaces that whole package in one piece: the EPC pressure control solenoid, shift solenoids A and B, the TCC on/off solenoid, the TCC PWM solenoid and the 3-2 downshift solenoid, already mounted on the internal harness with the pressure switch manifold. A pan filter and pan gasket are in the box. It also fits the 4L65E that shares this layout.
The 4L60E picks its gears with just two on/off shift solenoids. Their on/off combination steers the 1-2 and 2-3 shift valves, so a sticking solenoid A or B takes away whole gears at once. The EPC solenoid is the variable one: the computer changes its current to raise or lower line pressure, which is what makes a shift feel crisp or soft. The TCC on/off solenoid enables the converter clutch and the PWM solenoid meters how fast it applies, while the 3-2 solenoid times the coast and kickdown downshift. All of them run on oil from the actuator feed limit circuit and all of them get their 12 volts through one shared terminal at the case connector. The pressure switch manifold sits on the same harness and tells the computer which range the manual valve is in.
Refurbished means each solenoid in this set has been cleaned, bench-tested and reconditioned rather than built new. That is why the price lands well under a full set of new name-brand solenoids plus a harness.
Pull every code first, then check resistance at the case connector. The published spec is roughly 20-40 ohms for each shift solenoid and 3.5-8 ohms for the EPC solenoid. If several solenoid circuit codes appear together, check the fuse and the feed voltage before blaming the parts, because a loose crimp or a weak ignition switch on the shared feed can set all of them at once. Our 4L60E shift solenoid testing guide walks through the pin map, and the P0748 pressure control solenoid guide covers the most common single failure. If the solenoids test good and P0741 keeps coming back, the problem is often worn valve body bores, which no solenoid kit will cure.
This kit is listed for 2003-2007 Chevrolet and GMC trucks and SUVs with the 2003-up internal harness. Two warnings matter here. First, 1993-2002 transmissions use a different harness and PWM connector, so this kit will not fit them. Second, GM added an input speed sensor to the 4L60E during the 2006 model year and changed the internal harness and pass-through connector at the same time, so a 2006 or 2007 unit needs to be checked carefully against the kit photos before you order. Compare your harness, case connector and pressure switch manifold, or send us your year and VIN and we will confirm it. Interchange numbers on the listing include 24230298, 24219581, 24220158, 24227792, 24209276 and 10478131. You can browse every other part for this unit on the 4L60E parts page.
If the fluid came out dark and full of clutch material, solenoids alone will not save it; a 4L60E rebuild kit is the right next step. A truck that tows should also get a 4L60E transmission cooler to keep the new solenoids from cooking. Prefer all-new parts? Compare the new 2003-2007 solenoid kit.
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Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. 1993-2002 4L60E transmissions use a different internal harness and PWM connector. This kit is built for the 2003-up harness. Send us your year and VIN if you are not sure which you have.
It is listed for 2003-2007, but GM changed the internal harness and pass-through connector when it added the input speed sensor during 2006. Compare your harness and connector to the photos or send your VIN before ordering.
EPC, shift A, shift B, TCC on/off, TCC PWM and 3-2 downshift solenoids mounted on the internal harness with the pressure switch manifold, plus a pan filter and pan gasket.
No. Each solenoid is cleaned, bench-tested and reconditioned. That is how the kit costs less than a set of new name-brand solenoids with a harness.
Refill with Dexron VI ATF, check the level hot with the engine running, then clear codes and run the shift relearn with a scan tool.
Only if the TCC solenoid or its wiring is the cause. On these units P0741 is often valve body bore wear, so test the solenoid circuits first and vacuum test the valve body if they pass.
