4L80E Pump 1997, used and ready to install. Fits the 4L80E. Ships fast from the USA.
1997 was a turning point for the 4L80E, and it matters when you are shopping for a pump. If your 1997 Chevy or GMC 2500 or 3500 pickup, Suburban 2500, or Express or Savana van is slow to pick up Reverse when hot, feels mushy in every gear while towing, or hums in step with the engine, the front pump is a prime suspect. This is a used OEM pump assembly for the 1997 4L80E, a budget way to replace a damaged pump with a factory part that matches the 1997 design.
The pump is driven by the torque converter hub and produces all the oil flow the transmission uses. The pressure regulator valve in the pump cover sets line pressure and charges the converter, and the boost valve raises pressure when the EPC solenoid or Reverse calls for it. For the 1997 model year, GM rerouted the cooler return oil from the pump to the center support so cooled fluid lubricates the middle of the gear train. Transmission Digest reports that many internal hard parts were redesigned to go with that change. A 1997 pump therefore belongs with the center-lube case and center support, not with the 1991-1996 parts it replaced.
A 4L80E pump job means pulling the transmission, so test first. Verify fluid level and look for burnt fluid or debris, then gauge line pressure at idle and stall in each range and compare to the factory specs. Pressure that is low everywhere and does not respond to the EPC solenoid points at the pump or a big internal leak. Also make sure the problem is not a mixed-parts rebuild: Transmission Digest describes how an early sun gear shaft fitted into a center-lube unit restricts lube and cooler flow and drags the converter clutch. Our GM 4L80E heavy duty guide and Silverado 2500 4L80E shift problems guide cover the diagnosis step by step.
This pump is listed for the 1997 4L80E, the first center-lube year. It is not for 1991-1996 transmissions, which need the 1991-1996 4L80E pump. Pumps for 1997-2003 share the center-lube layout, but because these transmissions are often rebuilt or swapped between trucks, compare the casting numbers on your old pump body and stator support with this one, or send us your year and VIN and we will check fitment before shipping. Browse every part for this unit on the 4L80E parts page.
| Fits | 4L80E 1997 |
| Part type | Pump |
| Condition | Used |
| 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.
No. GM moved the cooler return from the pump to the center support for 1997 and redesigned internal parts with it. A 1991-1996 transmission needs the early pump.
It is a used OEM pump assembly. Inspect the gear pocket, gears, cover faces and bushing before you install it, and fit a new front seal, gasket and O-ring.
Gauge line pressure in every range. A worn pump reads low everywhere. If pressure is normal at idle but does not rise as commanded, test the EPC solenoid and wiring before pulling the transmission.
Use Dexron VI ATF. Prime the pump before the first start and check the level with the engine running and the fluid at operating temperature.
The 1997-2003 units share the center-lube design, but this pump is listed for 1997. Match the casting numbers on your old pump and stator to this one, or send us your year and VIN to confirm before ordering.
