GM 8L45, 8L90, Deep Pan

Retail Price: $385.00
Price: $365.00
  • SKU11140AC
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PML makes this 8 speed 8L45, 8L90 transmission pan to work on many GM/Chevy vehicles, including trucks with exhaust cross over pipes, like Canyon, Colorado, Sierra, and Silverado.

Since there are many different OEM transmission pans for the 8L45, 8L90 with different fluid levels, PML includes a hardware kit with several level checks so the customer can maintain correct transmission fluid levels. See SPECIFICATIONS section below.

Configurations vary so always check your vehicle for clearance.

The GM 8L45, 8L90 transmission can be found on many makes and models of 2015 and newer Chevrolet, Cadillac, and GMC vehicles.

  • 2017 and newer Colorado and Canyon, gas engines

  • 2015 and newer Silverado and Sierra 6.2L

  • 2016 to 2018 Silverado and Sierra 1500 5.3L

  • 2015 and newer Yukon Denali/Denali XL 6.2L

  • 2016 and newer Chevrolet Tahoe 6.2L

  • 2017 to 2018 Express/Savana 2500, 3500 2.8L I4 Turbo Diesel

  • 2018 Express/Savana 2500, 3500 4.3L V6

  • Some 2015 and newer models of Camaro, Corvette, and Cadillac ATS, CTS, CT4, and CT6 (may lack ground clearance for a deeper transmission pan)

  • 2015 and newer Escalade 6.2L

Always check your vehicle to verify transmission and clearance. Configurations vary and other transmissions are possible. Some vehicles have 6 speed transmissions and others have 10 speed transmissions so check carefully.

Volume: 3 to 4 quarts over stock (varies depending on stock pan)

Dimensions: Click here for dimensions. , Max height is 3.9, height at rear is 2.7 inches

Number of Bolts: 15 bolts (there are 17 holes, 2 holes locate the gasket)

PML Design and Benefits

PML designed an extra capacity, heavy duty pan for the GM 8L90 transmission. Our design includes these benefits:

  • Extra capacity
  • Drain hole and magnetic drain plug
  • Choice of level check stand off pipe for accurate fluid levels on many applications
  • No aftermarket dipstick needed to reduce cost
  • Works with stock filter and gasket
  • Finned to aid in heat dissipation
  • Heavy duty sand cast aluminum construction

Since there several different stock pans and level check stand off pipe heights, PML includes choices. See SPECIFICATIONS section for more information.

Video of Installation

This 2020 Silverado 1500 has aftermarket dual exhausts and a lift kit so this was a complicated installation! In the end, the PML pan fits great and clears exhaust.

Level Check

For most 8L45, 8L90 transmissions, the fluid level check is on the transmission pan. PML knows of 6 different OEM pans with various level check stand off pipes in the pan. The height of the pipe above the flange controls the amount of fluid.

GM 8L45, 8L90 stock pans standoff pipes
Inside of OEM transmission pans. Distance above the flange for these pans: none, 1 inch, 1 inch, and 1/4 inch
Measurements are approximate. Click on image to view larger.

When installing this PML pan, use the correct level check stand off pipe if one is needed. On the OEM pan, measure the distance from the flange to the top of the level check stand off pipe. If there's no pipe that goes above the flange, the PML pan is good to go out of the box. PML provides level check stand off pipes with each pan. Here is an example of a PML pan and an OEM pan:
GM 8L45, 8L90 stock pan and PML pan with standoff pipes  Click on image to view larger.

Maintaining a correct fluid level is important to the operation of the transmission so verify the fluid level check procedure of any aftermarket pan to avoid over or under filling transmission.

Inside of PML 8L90 Transmission Pan

Inside of PML GM 8L90 Transmission Pan  
Click on image to view larger.

Drain, Level Check, and Optional Temperature Sending Unit Machining

Drain and level check holes are located on the driver/left side of the PML transmission pan. Plugs are provided. For the drain hole, the plug is magnetic.

Drain hole location on PML GM 8L90 Transmission Pan   plug for drain and level check installed  Click on image to view larger.

The length of the level check stand off pipe varies with the application. PML supplies these with the pan.

Optionally, this pan can be drilled and tapped for an aftermarket temperature sending unit. The location is on the passenger side. If you want PML to machine this hole, there is a machining charge and the standard size is for a 1/8 NPT.

Gasket and Filter

This PML transmission pan works with the OEM gasket and filter.

This is the OEM gasket, GM part number 24260071.
GM 8L90 gasket  Click on image to view larger.

This is the OEM filter, GM part number 24274402.
GM 8L90 filter, pick up   GM 8L90 filter, spout GM 8L90 filter, part number
Click on image to view larger.

Example 8L90 Transmission and OEM Stock Pans

There are at least 6 different OEM stock transmission pans. The bolt hole pattern is the same for all of them. The shape of the pans vary and the standoff pipes for the level check are different. There are also internal differences with the transmission.

GM 8L90 Transmission and filter   OEM GM 8L90 transmission pans   2019 Colorado 8L90 Transmission Pan   2020 Silverado 8L90 Transmission Pan
Pictures of the stock pans are from a 2019 Colorado (GM part number 24274616) and a 2020 Silverado (GM part number 24278875).
Click on image to view larger images in a new tab or window.

PML Transmission Pan Compared to Stock

Always check your vehicle for clearance for a larger transmisssion pan before ordering. If the frame or an exhause pipe run under the stock pan, measure from the transmission housing flange down to see if PML pan will fit.

This PML pan is deeper than stock pans by about 1.5 inches at the deepest points and at the rear the PML pan is deeper by 3/8 to 1 inch, depending on OEM pan in the vehicle.

There are many different stock pans. The ones we have seen all have a maximum depth of about 2.4 inches.

At the rear where the PML pan does not have fins, it is 2.7 inches deep. This allows for clearance for exhaust cross over pipes or the frame which run under the rear of the pan on some vehicles.

PML 8L90 pan compared to stock  Click on image to view larger.

Measurements are approximate.