4L80E Tcc Solenoid 2003, remanufactured and ready to install. Fits the 4L80E. Ships fast from the USA.
Owners of a 2003 Chevrolet or GMC 2500/3500 pickup, Suburban 2500 or Express and Savana van usually land here because the converter will not stay locked: a vibration like driving over rumble strips at 45 mph, a tach that hunts at highway speed, or a P0741 that keeps coming back. The title says TCC solenoid, but the photo is a full remanufactured 4L80E valve body with its solenoids in place, including the lockup solenoid. For a 2003 unit that has already had a solenoid swapped without curing the slip, replacing the whole hydraulic control assembly is the step that usually finishes the job. Need just the loose solenoid? Message us first and we will confirm what fits.
2003 marks the changeover in 4L80E electrical parts. Our solenoid kits for 1991-2003 carry four pieces, the pressure control (EPC), shift A, shift B and TCC solenoids, while 2004-and-later units use a revised internal harness and solenoid set. On the 2003 body, the TCC solenoid opens to send oil to the converter clutch apply valve once the computer sees the right speed, gear and throttle. Lockup quality depends on two things: the solenoid switching cleanly, and the valve body delivering steady feed and apply oil. Worn bores in the apply and feed circuits bleed that oil off, so the clutch slips even when the solenoid is new.
Start at the case connector, not the pan. A TCC solenoid that reads outside 10 to 14 ohms is open or shorted; shift solenoids should be 18 to 24 ohms. Because the shift solenoids and TCC solenoid share one ignition feed, check that feed before condemning anything. Our shift solenoid diagnosis guide has the pinout and readings. If the electrical side passes, watch commanded versus actual slip on a scan tool under load. Steady slip with good solenoids points at valve body wear or the converter itself, and our 4L80E failure guide shows how to tell the two apart.
This listing is titled for the 2003 4L80E, and the unit itself is described as an updated 2003-and-up valve body with solenoids included. 2003 is a transition year: our loose solenoid kits split at 1991-2003 and 2004-up with a revised internal harness, so the connectors on your truck matter as much as the year. Compare the casting number and solenoid connectors on your old valve body with the photo, or send us your year and VIN and we will check it. For other 2003 parts, browse the 4L80E collection.
With the pan and filter off, unplug each solenoid from the internal harness, unhook the manual valve link, and lower the old body carefully so loose checkballs do not drop. Install the new body with the bolts tightened gradually in a pattern to factory torque. This is the moment to fit a new harness, filter and gasket kit for 1997-2003 if the original harness is stiff or the connector tabs are cracked, or at minimum a fresh filter and pan gasket. Fill with Dexron VI, clear codes, and drive through repeated lockup cycles at highway speed to prove the repair.
| Fits | 4L80E 2003 |
| Part type | Tcc Solenoid |
| 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.
The photo shows a complete remanufactured 4L80E valve body with the solenoids mounted, including the TCC lockup solenoid. If you were expecting only the solenoid, contact us before ordering.
This unit is described as a 2003-and-up valve body, but 2003 is a transition year for the internal harness and solenoids. Match the casting and solenoid connectors to your old valve body, or send us the VIN to confirm.
Ohm the TCC solenoid (10 to 14 ohms) and check the shared feed. If those pass, watch slip RPM with lockup commanded. A worn converter clutch can still slip with a perfect valve body, so rule it out before buying.
At least the filter and pan gasket. If the internal harness insulation is brittle or the case connector tabs are broken, replace the harness while the pan is down.
Use Dexron VI. It is back-serviceable for the Dexron III the 2003 unit was originally filled with.
