4L70E Solenoid Kit 2004-10, remanufactured and ready to install. Fits the 4L70E. Ships fast from the USA.
Owners of 2004-2010 GM pickups and SUVs usually land here after a scan tool shows a shift or pressure control solenoid code, or after the truck starts banging into second, flaring on the 2-3, or holding third with no overdrive. This is a remanufactured solenoid kit listed for 4L70E applications from 2004 to 2010, and at its price it is the budget way to refresh the whole solenoid set instead of buying parts one by one. The product photo shows five solenoids and the pressure switch manifold: the A and B shift solenoids, the late-style EPC solenoid, and the two spool-type solenoids that run the 3-2 downshift and converter clutch apply. No internal harness is pictured, so plan on reusing yours if it is in good shape.
These years straddle an important change. Until 2005 this case family was sold as the 4L60E and 4L65E; ATRA's GM update material announced the 4L70E as a new model for 2006, built with the same technology as the updated 4L60E and 4L65E. Across the whole range, the solenoids are fed regulated oil from the actuator feed limit (AFL) valve. Sonnax, writing in Transmission Digest, puts that feed at roughly 115 psi, and it supplies the shift, pressure control, converter clutch and 3-2 solenoids. The shift solenoids pick the gear by switching on and off, the EPC solenoid trims line pressure with current, and the pressure switch manifold tells the computer which range the driver selected. When any of those signals goes wrong, the computer commands one thing and the hydraulics deliver another.
A solenoid performance code does not always mean a bad solenoid. Sonnax's AFL valve article lists second-gear starts, no fourth, and solenoid and ratio codes as symptoms of a worn AFL valve and bore, because a worn bore starves every solenoid of feed pressure at once. If several solenoid codes appear together and each solenoid tests within spec, suspect the valve body. On the pressure control side, check EPC current with an amp clamp; Gears magazine gives roughly 0.9 to 1.1 amps at idle, dropping toward zero at wide open throttle. Our 4L70E EPC solenoid symptoms guide covers that test, and 4L70E valve body problems and testing explains how to tell bore wear from a bad solenoid.
Listed for 2004-2010 4L70E applications, which in practice covers the late 4L60E and 4L65E years as well as the first 4L70E trucks: Silverado, Sierra, Tahoe, Yukon, Suburban, Trailblazer SS and related models. Every EPC solenoid in this range is the late 2003-and-later style, which Sonnax notes uses a different connector than the 1992-2002 design. The input speed sensor and its wiring arrived with the 2006 update, so harness details vary by year even though the solenoids are shared. Hold your old solenoids next to the photo and match the connectors, or send us your year and VIN. The 4L65E vs 4L70E differences guide explains the split, and the full range is on the 4L70E collection page.
Drain the pan, remove the filter and lay out the old solenoids in order as they come off so connectors are not swapped. Inspect the harness for hardened insulation and check the case connector pins; if the harness is cracked, replace it with the 4L70E internal wiring harness at the same time. Oil every O-ring with ATF, seat each solenoid squarely, reinstall the clips and torque the pressure switch manifold bolts evenly. Refill with DEXRON-VI, which GM specifies for the 4L70E, clear codes and road test. If you only need the pressure control side, the 2003-2008 4L70E pressure control solenoid is sold on its own, and the 2004-2010 master rebuild kit is the step up if the clutches are worn too.
| Fits | 4L70E 2004-10 |
| Part type | Solenoid Kit |
| Condition | Remanufactured |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Remanufactured. It is the lower-cost way to replace the full solenoid set on a 2004-2010 unit.
No harness is shown in the product photo. Reuse your original if the insulation and connectors are sound, or add a replacement harness.
The listing covers 2004-2010, which includes late 4L60E and 4L65E years before the 4L70E name was introduced for 2006. Match your connectors to the photo or send your year and VIN to confirm.
A worn actuator feed limit valve bore starves all the solenoids of feed pressure. Sonnax lists second-gear starts, no fourth and solenoid codes as AFL symptoms. That is a valve body repair.
Use DEXRON-VI with a new filter and pan gasket, then clear codes and road test through all gears.
