Remanufactured 4L60E solenoid set on the internal harness with pressure switch, filter and pan gasket for 1993-2002 GM trucks, SUVs and F-bodies.
If your 1993-2002 Silverado, Sierra, Tahoe, Yukon, Suburban, S10 Blazer, Jimmy, Camaro or Firebird is throwing a string of shift solenoid codes, losing lockup, or shifting hard and late, the problem is often not one solenoid but the whole internal circuit getting old together. This package replaces that circuit in one pan drop: a new internal wiring harness carrying the shift, TCC, PWM, pressure control and 3-2 solenoids, a new pressure switch manifold, and a fresh pan filter and gasket. The solenoids are remanufactured and bench tested.
The early 4L60E has no mechanical shift control beyond the manual valve. Everything else is electrical. The computer feeds the solenoids through a single round case connector, and the internal harness carries that signal to each one. The two shift solenoids set the gear by their on/off pattern: the ATRA GEARS solenoid chart lists first as both on, second as A off and B on, third as both off and fourth as A on and B off. The pressure control (EPC) solenoid trims line pressure, the TCC and PWM solenoids apply the converter clutch, and the 3-2 solenoid times part-throttle and kickdown downshifts. The pressure switch manifold reports the selected range back to the computer.
Because the harness lives in hot fluid for its whole life, the insulation hardens and the terminals loosen. ATRA Technical Bulletin 583 describes a poor crimp on one terminal of the shared solenoid feed circuit setting several solenoid codes at once on 4L60E units. Replacing the solenoids without the harness can leave that fault in place.
Read codes first, then test at the case connector before you drop the pan. ATRA Technical Bulletin 269 lists both shift solenoids at 20-40 ohms and the pressure control solenoid at 3.5-8.0 ohms on this case connector. A reading far outside that range, or one that changes when you flex the harness, points to this kit. Resistance alone does not prove a solenoid is good: Transmission Digest covered a 2001 S10 with a stored P0758 where solenoid B measured within spec but was slow to respond, and only replacement cured it. Our 4L60E shift solenoid testing guide walks through the full check, and the TCC solenoid and P0740 guide covers lockup complaints. If the fluid is burnt and you have a slipping 3-4 clutch, solenoids will not fix it.
Listed for the 1993-2002 4L60E and the 2001-2002 4L65E: Tahoe, Yukon, Suburban, Silverado and Sierra 1500-2500, S10 Blazer, Jimmy, Envoy, Camaro and Firebird, plus the 1993-1996 Fleetwood and Roadmaster. It does not fit 2003-up units. GM changed the harness and connector layout for 2003, so a 2003 truck needs the later style even if a solenoid looks identical. Builds near the changeover can vary, so compare the case connector and pressure switch manifold to the photos, or send us your year and VIN before ordering. Other early and late versions are on our 4L60E parts page.
If testing points to valve body bore wear rather than electrical faults, a remanufactured 2001-2002 valve body is the better fix. If the unit is coming apart anyway, pair this kit with a 1997-2003 master rebuild kit so the hydraulics and electrics start fresh together.
| Fitment | GM 4L60E 1993-2002, 4L65E 2001-2002 |
| Does not fit | 2003-2005 4L60E/4L65E |
| Includes | Internal harness, shift A/B, TCC, EPC, 3-2 and PWM solenoids, pressure switch manifold, filter, pan gasket |
| Pieces | 9 |
| Condition | Remanufactured, tested |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. This package is for 1993-2002 4L60E and 2001-2002 4L65E units. GM changed the internal harness and connector layout for 2003, so a 2003 or later truck needs the later style kit from our 4L60E parts page.
On an early 4L60E the harness has lived in hot fluid for two decades or more. Brittle insulation and loose terminals can set the same codes as a failed solenoid, so replacing the whole circuit removes both causes in one pan drop.
Yes. Resistance only checks the coil. A solenoid can measure correctly and still be slow to open or close under heat, which is why shift complaints sometimes survive a meter test.
Use Dexron VI. It is the current GM fluid and is backward compatible with these earlier 4L60E units. Check the level hot with the engine running in park.
Clear the codes, then drive the truck through several full warm cycles with light and moderate throttle so the computer can adapt shift pressures to the new pressure control solenoid. Early shifts may feel slightly firm until it settles.
Look at the pan debris and the filter. Heavy clutch material or metal means internal wear that solenoids will not fix, and the valve body or clutch packs need attention first.
