4L70E Shift Kit 2003, remanufactured and ready to install. Fits the 4L70E. Ships fast from the USA.
Although it is listed with our shift kits, this is a complete master solenoid kit for the late GM four-speed: 2003 and newer 4L60E, 4L65E and 4L70E transmissions. It replaces every electrical control part on the valve body at once, which is the right move when a 2003-2013 Silverado, Sierra, Tahoe, Yukon, Suburban, Avalanche or Escalade is setting shift solenoid or pressure control codes, starting in the wrong gear, refusing to lock the converter, or shifting hard after years of dirty fluid. Each solenoid is remanufactured, flow tested and resistance checked.
The 4L70E is controlled entirely by solenoids. The kit includes all six control pieces:
The 2003 split matters for the EPC solenoid. Sonnax documents that GM changed to a late-style EPC solenoid in 2003 with a different pin and connector layout, so early 1992-2002 solenoids do not plug straight into a 2003-up harness. This kit is the late design.
Scan for codes and look at the data, not just the code list. Rob Faucett's Gears Magazine article explains that a healthy GM pressure control solenoid is commanded around 0.9 to 1.1 amps at idle and drops toward zero at wide open throttle; actual current that will not follow the command points to the solenoid or wiring. Our 4L70E EPC solenoid symptoms guide walks through that test, and the 4L70E common problems guide helps separate solenoid faults from clutch damage. Check the internal harness and case connector too, since a chafed wire sets the same codes.
The listing covers GM 4L60E, 4L65E and 4L70E automatics from 2003 on, with example applications including 2003-2013 Silverado 1500, Sierra 1500 and Avalanche and 2003-2014 Tahoe, Yukon, Suburban and Escalade. Confirm your truck has one of these four-speeds, not a six-speed 6L80. If you are not certain, compare the solenoid connectors to the photos or send us your year and VIN before ordering. Every part for this family is listed on the 4L70E parts page.
The solenoids live on the valve body, so this is a pan-off job that does not require pulling the transmission. Drain the pan, drop the filter, unplug the harness, then replace the solenoids one at a time so each connector goes back to the right part. Lube new O-rings with clean ATF and do not force a solenoid into its bore. If the harness is brittle or chafed, replace it with an 4L70E internal wiring harness while you are in there, and if you are chasing harsh shifts or TCC slip, a TransGo shift kit fixes the worn TCC regulator bore that new solenoids alone cannot. Install a new filter, refill with DEXRON-VI, clear codes and let the computer relearn shifts with a gentle drive cycle.
| Fits | 4L70E 2003 |
| Part type | Shift Kit |
| Condition | Remanufactured |
| Brand | GM |
| Ships | From the USA |
| Warranty | 1-year |
It is a master solenoid kit: A and B shift solenoids, 3-2 solenoid, EPC solenoid, TCC PWM solenoid and the pressure switch manifold. It does not include valve body springs or valves.
No. This kit is the 2003-and-up design. GM changed the EPC solenoid connector in 2003, so earlier trucks need the early-style parts.
Yes. It is listed for 2003-up 4L60E, 4L65E and 4L70E, which share the same solenoid layout.
No. The solenoids are on the valve body and are reached by dropping the pan and filter.
Install a new filter, refill with DEXRON-VI, check the level hot, clear the codes and drive normally while the computer relearns shift timing.
