Replaces the 1-2/2-3 shift solenoids, 3-2 downshift, EPC and TCC PWM solenoids on 1993-2002 GM 4L60E and 4L65E transmissions in one job.
Owners of 1993-2002 Chevy and GMC pickups, S-10s, Blazers, Tahoes, Camaros and other early 4L60E vehicles usually land here after a scan tool shows P0751, P0753, P0756 or P0758, or after the truck starts pulling away in second, refuses to lock the converter, or slams every shift. This five-piece set covers the solenoids on the early-style valve body in one job: shift solenoid A (1-2), shift solenoid B (2-3), the 3-2 downshift solenoid, the EPC pressure control solenoid and the TCC PWM solenoid. It is a practical buy for a high-mileage truck where one solenoid has already failed and the rest have the same years and heat on them.
Every gear change in the early 4L60E comes from the A and B shift solenoids switching on and off in a fixed pattern, so the computer can command a gear the hydraulics cannot deliver if either one is slow or leaking. The EPC solenoid tells the pressure regulator how much line pressure to build, which sets shift firmness. The TCC PWM solenoid feathers the converter clutch on and off, and the 3-2 solenoid times the downshift into third. Sonnax notes that the AFL valve in this transmission regulates the solenoid feed to roughly 115 psi, which means one worn feed circuit can starve every solenoid at once.
Two real shop cases show why testing comes first. Transmission Digest described a 2001 S-10 with P0758 that held second gear for 20 to 25 seconds after third was commanded before finally shifting. Both solenoid circuits measured close to 27 ohms, inside GM's 19-31 ohm specification, yet the 2-3 solenoid was slow to respond and had no audible release click when cycled with a scan tool. A resistance check alone would have passed it. In a second case, a 1993 C1500 kept starting in second even after new solenoids and a complete replacement valve body. Line pressure read a healthy 62 psi, and the real cause was a missing seal on the 1-2 accumulator piston that let pressure apply the band. So command each solenoid with a scan tool and listen for a crisp on and off click, compare commanded gear to actual ratio, and check line pressure before you replace electrical parts. Our 4L60E shift solenoid testing guide covers the full sequence, and the 3-2 downshift solenoid guide explains that circuit.
This kit is listed for GM 4L60E and 4L65E transmissions from 1993 through 2002. Starting with 2003, GM changed the solenoid and pressure switch arrangement and the harness, so a 2003-up truck needs a different set such as the 2003-2005 master solenoid kit with harness. Converter controls and connectors also changed during the 1993-2002 span, so compare the solenoid styles and connectors on your valve body with this kit, or send us your year, model and VIN and we will confirm it. You can browse all 4L60E parts on the 4L60E parts page.
With the pan and filter off, unplug the internal harness from each solenoid. The A and B shift solenoids slide out once their retaining clips are removed, the TCC PWM and 3-2 solenoids are bolted in place, and the EPC solenoid is held by its bracket. Lube each O-ring with ATF and seat every solenoid fully. If your old harness is brittle or the connector locks are broken, choose the 1993-2002 master kit with harness, filter and gasket instead. While the pan is off, consider the aluminum pan kit with filter and drain plug, which makes the next fluid service a simple drain. Refill with Dexron VI, clear codes and road test through every gear with a scan tool connected.
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Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. It is for 1993-2002 4L60E and 4L65E transmissions. GM changed the solenoid, pressure switch and harness arrangement for 2003, so later trucks need the 2003-up kit.
Five: shift solenoid A (1-2), shift solenoid B (2-3), the 3-2 downshift solenoid, the EPC pressure control solenoid and the TCC PWM solenoid. The internal harness is not included.
Yes. Transmission Digest documented a 2001 S-10 whose 2-3 solenoid measured about 27 ohms, inside the 19-31 ohm spec, but was slow to release and delayed third gear by 20 to 25 seconds. Command each solenoid with a scan tool and listen for a clean on and off click.
Sometimes, but not always. The valve body defaults to second until line and AFL pressure reach about 48 psi, and a missing 1-2 accumulator piston seal can also apply the band. Check line pressure before replacing parts.
Dexron VI is the current GM fluid and is backward compatible with these earlier units. Refill, check the level hot and clear codes before the road test.
