6T45 Pump, remanufactured and ready to install. Fits the 6T45. Ships fast from the USA.
An Equinox, Terrain, Malibu or other GM front-drive model with the 6T45 that hesitates going into Drive or Reverse, slips in every gear once it is hot, or whines in step with engine speed may have a pump that can no longer hold pressure. This is a remanufactured 6T45 oil pump. The listing cross-references GM numbers 24245551, 24256950 and 24256951, and it is the same pump design shared across the 6T30, 6T40 and 6T45.
The 6T45 is the heavier-duty sibling of the 6T40, built for the bigger four-cylinder and V6 crossovers and sedans. It shifts clutch-to-clutch, so every apply and release depends on the control solenoids getting a steady supply of oil from the pump. On the first two generations of this family the pump is driven off the torque converter, so it turns whenever the engine runs. Transmission Digest notes that Gen 1 and Gen 2 used the same pump layout, with only a slightly different pressure regulator valve in Gen 2. Starting with the 2015 model year, GM switched the Gen 3 units (6T31, 6T41, 6T46, 6T51) to an off-axis, chain-driven vane pump, which is a different part entirely.
A weak pump causes problems everywhere. If the 6T45 slips only in Reverse, 3rd and 5th, or sets P0776, look first at the 3-5-R clutch and its wave plate, which is the best-known failure in this family and has nothing to do with the pump. Check fluid level the correct way, hot at the level set plug, because a low level imitates a failing pump. Then confirm low line pressure in every range before you pull the unit. Our 6T40 delayed engagement guide walks through those checks in order, and 6T40 common problems and fixes covers the failures that share these symptoms.
This pump fits the 6T45 and is cross-referenced to 24245551, 24256950 and 24256951. It is not the Gen 3 pump. If your transmission is a 2015 or later unit tagged 6T46, you need the chain-driven Gen 3 design instead, listed as our Gen 3 6T40 pump. Gen 1 and Gen 2 units changed over during the 2012 model year, so compare the part number or casting on your old pump with the numbers above, or send us your year and VIN and we will confirm fit before it ships. If the pump is being replaced because of a pressure complaint, a 6T45 solenoid kit covers the other half of the pressure control system.
| Fits | 6T45 |
| Part type | Pump |
| Condition | Remanufactured |
| Brand | GM |
| Reference | 24245551 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Only if the transmission is a Gen 1 or Gen 2 unit. From the 2015 model year GM moved to the Gen 3 6T41/6T46 with a chain-driven off-axis pump, and that needs the Gen 3 pump. Send us your VIN and we will check.
The listing cross-references 24245551, 24256950 and 24256951. Match one of those to the number or casting on your old pump.
Usually not. Slipping or no Reverse, 3rd and 5th with P0776 points at the 3-5-R clutch and its wave plate. A failing pump causes low pressure and slipping in every gear.
DEXRON VI. GM lists a 4.0-6.0 L fluid change capacity for the 6T40 family. After any repair, set the level hot at the level set plug instead of filling by volume.
Yes. Clear the adaptive values and run the adaptive learn procedure with a scan tool. Expect shift quality to settle over the first several shift cycles.
