4L60E Pressure Control Solenoid 2003-05, new and ready to install. Fits the 4L60E. Ships fast from the USA.
If your 2003, 2004 or 2005 Silverado, Sierra, Tahoe, Yukon, Suburban or Avalanche with a 4L60E has started slamming into gear, shifting soft and slippery under load, or setting P0748, the pressure control solenoid is a prime suspect. This is a new EPC solenoid listed for the 2003-05 4L60E, with a 1-year warranty. Buy it when you have tested the old one and confirmed it is the fault, and you want a new part matched to these model years rather than a universal fit.
Line pressure in the 4L60E is not fixed. The powertrain module varies current to the EPC solenoid, and the solenoid sends a matching signal pressure to the boost valve, which in turn pushes the pressure regulator to raise or lower line pressure. GEARS Magazine describes the relationship as inverse: around 0.9 to 1.1 amps at idle produces low pressure, and current falls toward zero at wide-open throttle for maximum pressure. That is why a failed solenoid can go either way. A weak or contaminated one leaves pressure high and every shift harsh; one that leaks or sticks the other way lets clutches and the 2-4 band apply soft and burn.
Measure before you spend. The Teckpak-Fitzall installation sheet for the GM force motor lists 3.5 to 4.66 ohms at the solenoid, and it gives 4L60E line pressure as roughly 50 to 189 psi in Drive, Park or Neutral and 67 to 324 psi in Reverse, idle to wide open. A gauge on the line pressure port tells you more than any scan tool reading. If resistance is good but pressure is low, Sonnax points to a worn pressure regulator valve, which typically reads 50 to 100 psi under spec in Reverse and is not cured by a new solenoid. Our line pressure test guide shows the gauge hookup, and the EPC solenoid function guide covers amp-clamp testing.
This listing covers the 4L60E in 2003, 2004 and 2005 GM applications. GM made running changes to the 4L60E internal harness and valve body around 2003, so do not assume an older solenoid is identical. Pull the old part and compare its connector and body to the product photo, or send us your year and VIN and we will confirm. The same 2003 trucks are also covered by the 2003-2007 pressure control solenoid, and every 4L60E part we stock is on the 4L60E collection page.
| Fits | 4L60E 2003-05 |
| Part type | Pressure Control Solenoid |
| Condition | New |
| 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.
It is listed for 2003-2005. GM changed the 4L60E harness and valve body during this period, so match your old solenoid to the photo or send your year and VIN before ordering for any other year.
It is new and carries a 1-year warranty.
Unplug it and measure resistance; the force motor spec is about 3.5 to 4.66 ohms at the solenoid. Then test line pressure with a gauge. A good solenoid with low pressure points to a worn pressure regulator or boost valve.
Yes. Low line pressure lets clutches and the 2-4 band slip, and the 3-4 clutch pack in the 4L60E is especially vulnerable. Fix pressure problems quickly.
Clear codes and reset transmission adapts with a scan tool if it supports it, then drive through all gears so the module relearns shift pressure.
