4L80E Valve Body 2004, remanufactured and ready to install. Fits the 4L80E. Ships fast from the USA.
By 2004 the 4L80E had mostly moved out of GM's heavy-duty pickups — 2500/3500 trucks running the Duramax diesel had already switched to the Allison 1000 — so a 2004 4L80E showing a flared 1-2 shift, slipping under load, delayed engagement, or a stored pressure/shift code is almost always sitting behind a gas V8 in a Suburban 2500, an Express or Savana van, or a Hummer H1. This listing is a remanufactured 2004 4L80E valve body with a 1-year warranty, built to the solenoid-integrated casting GM carried through the 2003-up 4L80E.
The valve body routes line pressure from the pump through a stack of precision bores and spool valves to apply the correct clutch pack or band for the gear the PCM has selected. On the 2003-up casting used through 2004, the pressure control and shift solenoids mount directly to the valve body, so the PCM commands a variable current through the PCS to set line pressure on the fly rather than relying on a fixed mechanical boost valve alone. Worn bores or a tired PCS on this casting show up fast as harsh or flared shifts and pressure complaints.
If the symptom is specifically rough or flared shifting without a hard code, it's worth testing the pressure control solenoid's current draw before replacing the whole valve body — a PCS that can't hit its commanded amperage will mimic a worn valve body. Our PCS symptoms guide covers that test.
On a healthy 2003-up 4L80E, the PCS should pull roughly 0.9-1.1 amps at idle with light load and drop toward 0.2-0 amps near wide-open throttle. A reading that's flat or erratic across that range, combined with a line pressure test in Reverse, 3rd, and 4th that's out of spec, points to the valve body itself rather than just the solenoid. Our valve body testing guide walks through the full gear-by-gear pressure check.
This valve body is built for the 2003-up solenoid-integrated 4L80E casting and fits the 2004 model year specifically. Confirm the casting number stamped on your old unit matches before ordering, since the earlier non-solenoid-integrated castings used through the 1990s are not interchangeable with this one. If your truck falls outside 2004, see our general 4L80E valve body listing for other year-matched options, or browse the 4L80E parts collection.
Drop the pan and replace the filter with fresh Dexron VI ATF at the same time — the ATP filter and gasket kit covers that. Torque the valve body bolts to spec in the correct sequence, then run the adaptive shift relearn so the PCM isn't still compensating for the old unit's wear pattern. If the solenoids on the removed valve body test out of range, replace them as a set rather than one at a time — the 7-piece master solenoid kit built for 2004-on units covers the full internal harness and filter in one job. Inspect the pump at the same time if the truck has towing miles; a worn 2004 pump can mimic valve body symptoms by starving the whole hydraulic circuit of pressure.
| Fits | 4L80E 2004 |
| Part type | Valve Body |
| 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.
It's built to the 2003-up solenoid-integrated casting, so it shares fitment with that family, but we list it against the 2004 model year specifically — confirm your casting number if you're outside 2003-2009.
It's remanufactured from an OEM core and backed by a 1-year warranty against defects in the rebuild.
Test the PCS's current draw first. If it can't hit its commanded amperage but the bores and other circuits test fine, a solenoid alone may fix it; if pressure is off across multiple gears, the valve body itself is worn.
By 2004 the 4L80E was mainly behind gas V8s in the Suburban 2500, Express and Savana vans, and the Hummer H1, since 2500/3500 Duramax trucks had already switched to the Allison 1000.
Only if the truck has significant towing miles or the pump itself tests worn. A failing pump can produce the same low-pressure symptoms as a worn valve body, so rule it out before assuming the valve body alone solved the problem.
