4L60E Pump 2004, remanufactured and ready to install. Fits the 4L60E. Ships fast from the USA.
Own a 2004 Silverado 1500, Sierra 1500, Tahoe, Yukon, Suburban or another 4L60E-equipped GM that now sits for a beat before it moves, flares or slips no matter which gear it is in, or hums louder as the revs climb? Those are textbook signs of a front pump that can no longer hold line pressure. This remanufactured 4L60E pump is matched to the 2004 model year and arrives assembled, so the job is a bolt-in replacement rather than a bench rebuild of a worn body. It is covered by a 1-year warranty.
Inside the pump, a rotor driven by the torque converter hub carries vanes that sweep oil around a moveable slide. GM's service information calls it a 13-vane, variable-displacement pump: as the slide pivots, the pumping chamber grows or shrinks, and the pressure regulator valve in the cover positions the slide to hold the pressure the PCM commands. The cover also houses the boost valve, the converter clutch valve and the stator shaft that feeds converter oil.
A 2004 pump sits just ahead of GM's big internal redesign. According to Wayne Colonna's 4L60-E history in PTEN, the changes that made room for an input speed sensor started in 2005, beginning with a new single-spring TCC valve and a shorter boost valve and sleeve, followed by a revised casting and stator shaft. A 2004 unit predates all of that, which is exactly why a pump from a later sensor-ready transmission is not a safe swap without checking the input shaft.
The test that settles it is a line pressure check with a mechanical gauge in drive and reverse, at idle and under load. Low readings across the board suggest the rotor, vanes or slide are leaking internally. Pressure that is fine at idle but falls away in reverse or at heavy throttle usually means a worn pressure regulator bore; Sonnax has documented that bore wear alone can drop boost pressure well below spec. Our guide to 4L60E pump rotor and bushing wear walks through each wear point, and if your symptoms are mostly harsh or soft shifts, check 4L60E 1-2 accumulator and shift feel before condemning the pump.
This listing is for 2004 4L60E transmissions, which covers the GMT800 full-size trucks and SUVs of that year along with other 4L60E rear-drive and 4x4 GM vehicles. Lay your old pump beside this one and compare the cover casting, stator shaft and converter hub bore, and confirm the input shaft in your transmission matches a pre-sensor pump. If anything does not line up, or you simply want a second set of eyes, send us your year and VIN. If you are not sure which side of the revision your truck falls on, the 2004-2006 4L60E pump is the wider-range option, and the full lineup is in the 4L60E parts collection.
| Fits | 4L60E 2004 |
| Part type | Pump |
| 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.
Not necessarily. GM began changing the pump in 2005 to add an input speed sensor, including the TCC valve, boost valve, casting and stator shaft, and completed it in model year 2006. A 2004 pump predates those changes, so match it to your input shaft.
It is listed for 2004 4L60E transmissions, which includes the 2004 Tahoe and Yukon with the 4L60E. Compare the old pump to this one or send us your year and VIN to confirm.
The pump turns any time the engine runs, so a whine that changes with RPM in park or neutral often comes from worn pump gears, vanes or bushing. A line pressure test helps confirm it.
Dexron VI. Add some to the converter before installing it and fill the case before starting so the pump does not run dry.
If low pressure has already burned the 3-4 clutch or the fluid is full of debris, yes. A 2004-specific rebuild kit lets you replace the frictions and seals while the case is open.
