6L80 Pump, remanufactured and ready to install. Fits the 6L80. Ships fast from the USA.
Low line pressure on a GM six-speed rarely announces itself as a pump problem. It shows up as a truck that sits a beat too long before Drive takes hold, a Tahoe that slips across several gears once the fluid is hot, or a Camaro that whines with engine speed. This listing is a remanufactured 6L80 front pump assembly, rebuilt and ready to bolt in, for the GM 6L80 used in 2006-2020 Silverado, Sierra, Tahoe, Suburban, Yukon, Escalade, Camaro and Corvette applications. It does not carry a model year in its title, so it suits a builder who will match the old pump against it before installation.
The 6L80 front pump is turned by the torque converter hub, so it runs any time the engine does. It is a variable-displacement vane design: output is trimmed to demand rather than dumped over a relief valve, which saves power at cruise. The pump body also houses the pressure regulator valve that sets line pressure, and the pump cover with its stator support carries the sealing rings that pass apply oil into the rotating 1-2-3-4 and 3-5-Reverse clutch housing. Because this is a clutch-to-clutch transmission with no bands, every shift depends on that pressure being steady. A pump that leaks internally or a regulator valve that hangs up drags the whole unit down at once.
Hook a gauge to the line pressure tap and compare readings in Park, Reverse and Drive at idle and at a light stall. Low pressure everywhere points to the pump or the regulator valve; low pressure in one range points to a clutch circuit instead. Pull the pan and look at the filter neck for cracks and the debris for aluminum. A slipping 6L80 can also be a valve body or TEHCM fault (P0716, P0717 or P0751), so scan it first. Our 6L80 pump failure symptoms guide lays out the pressure test and the bulletins, and the 6L80 common problems article covers the failures that mimic a weak pump.
This pump is listed for the 6L80 without a specific year. Over its run the 6L80 picked up revised pump cover sealing rings (late 2008), different stator shaft details on later trucks, and service covers with their own notes, so do not assume every 6L80 pump is identical. Compare the pump body casting, the stator shaft length and the ring configuration with your old pump, or send us your year and VIN and we will check it for you. If you know your year, we also carry the 2007 6L80 pump and the 2006 6L80 pump, and the full lineup is in the 6L80 parts collection.
| Fits | 6L80 |
| 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.
It is listed for the 6L80 without a model year. GM revised the pump cover rings and stator shaft details during production, so compare your old pump or send us year and VIN and we will confirm before it ships.
A line pressure test tells you. Low pressure in every range points to the pump or pressure regulator; slipping in one gear with normal pressure points to a clutch pack or the valve body.
A front seal, the pump bushing if it is not already new, a new filter and filter seal, and fresh DEXRON VI. Check the converter hub and have the converter serviced if it is scored or the fluid was full of debris.
DEXRON VI. A pan and filter service takes about 6 quarts on the 6L80; a pump job with the converter out takes considerably more, filled and checked hot at the check plug.
Yes. Line pressure and clutch fill times change, so run the TCM clutch adaptive relearn with a capable scan tool and drive it through all gears afterward.
