6T45 Pump 2012, used and ready to install. Fits the 6T45. Ships fast from the USA.
This is a used GM pump assembly for the second-generation 6T45 and 6T40, part number 24253823, for 2012 and later units. If your Equinox, Terrain, Malibu, Regal, LaCrosse or Verano is slow into gear, slips in every range once warm, or whines with engine speed and a pressure test points at the pump, this is the complete assembly rather than a body you have to build up.
GM made a set of running changes to the 6T40, 6T45 and 6T50 for the 2012 model year. Diagnostic manuals call them Gen 2, and the parts catalog calls them second design. The pump kept the same basic layout as Gen 1 and is still driven by the converter, but GM changed the identification marking on the pressure regulator valve, and the control solenoid valve lost its pressure switches. That matters here: the pump makes the oil, the regulator valve in the pump sets line pressure, and the solenoids meter it out to the clutches. A Gen 2 regulator calibration is what this unit expects.
Slip in only Reverse, 3rd and 5th with P0776 is a different problem: the 3-5-R clutch and its wave plate, not the pump.
Set the fluid level hot at the level set plug first, because a low level imitates a weak pump. Then put a gauge on it and check line pressure in Drive and Reverse at idle and under load. Low in every range, along with metal in the pan, points at the pump; low in one range points at a clutch or valve body circuit. Our 6T40 delayed engagement guide walks the order, and the 6T40 valve body symptoms guide helps rule out the pressure control side.
The listing covers non-BAS+ 6T40 and 6T45 Gen 2 transmissions, 2012 and up, under GM 24253823. Check two things before you order. First, GM kept some 2012 models on Gen 1: the 1.8L Cruze and Sonic, the 3.0L Captiva Sport and the Orlando. Those need the Gen 1 6T45 pump body. Second, from 2015 the Gen 3 units moved to a remote-axis vane pump, so a late Gen 3 6T46 or 6T41 needs our Gen 3 6T40 pump. Match 24253823 to your old pump, or send us the year and VIN and we will confirm it.
| Fits | 6T45 2012 |
| Part type | Pump |
| Condition | Used |
| Brand | GM |
| Reference | 24253823 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
The listing describes it as a pump assembly, GM 24253823, for Gen 2 6T40 and 6T45 units. It is a used part, so inspect it and fit new seals before installing.
Probably not. GM's own bulletin says the 2012 Cruze and Sonic with the 1.8L stayed on the Gen 1 design. Send us your VIN and we will tell you which pump you need.
No. The listing excludes BAS+ (eAssist) applications. It is for non-BAS+ Gen 2 6T40 and 6T45 units.
Gen 2 started in the 2012 model year and removed the pressure switches from the control solenoid valve, so Gen 2 cannot set the pressure switch codes P0842, P0872, P0877 or P0989. The pump part number 24253823 is the best match.
DEXRON VI only. GM lists a 4.0-6.0 L fluid change capacity for the 6T40; set the final level hot at 85-95 C at the level set plug.
Yes. Clear the transmission adaptive values and run the adaptive learn with a scan tool so the TCM relearns clutch fill.
