GM 8L45, 8L90 Deep
Part Number 11140

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)

Pricing: not yet available

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.

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.

If there is not enough ground clearance for this deep pan, email us at: [email protected]

2021 Canyon

Tyler email us that the installation of the PML pan on his 2021 GMC Canyon Denali 3.6 4x4 was straight forward. To remove the old pan he unbolted the manifolds, so he needed new manifold to main pipe gaskets To install the PML pan, he also lower the exhaust hanger that mounts near the passenger side of the transmission.

After that it was just a matter of getting everything bolt into place. His truck needed the tallest of the fill check plug options (Stock Pan GM part number 24274616). The truck when up to temperature took 8 quarts of Mobil One Synthetic LV ATF HP fluid. He also changed the filter and opted to replace the reusable pan gasket (GM part numbers 24295812 and 24260071 respectively).

Under normal driving conditions the increased fluid capacity and the pan acting as a better heat sink and potentially catching more air flow, Tyler has averaged me 10-15 degrees lower temps, even uphill.

Tyler found the clearances on the exhaust "PERFECT and have to rate this thing a 10/10". 

OEM pan on 2021 Canyon Denali 3.6   draining fluid from OEM pan, exhaust too close to remove OEM pan   gaskets for exhaust manifolds   PML pan and OEM pan, level check stand off pipes at same height above flange   gasket on PML transmission pan   exhaust dropped, PML pan installed   installing PML pan and putting exhaust back together   PML pan installed, clears exhaust, fits good
Click on image to view larger in a new tab or window.

2020 Silverado 1500

Torrance Transmission installed this PML 8L90 pan on Damien's 2020 Silverado 1500 5.3 Z71 4WD truck. Truck has a lift kit, 38 inch tires, aftermarket dual exhaust and a PML GM 9.5 12 bolt rear differential cover.

This truck had OEM pan part number 24278775 and the fluid check hole was level with the flange. After loosening the aftermarket exhaust pipes and jacking up the transfer case, the OEM pan could finally be removed and the PML pan installed. The fill plug is behind a shield, which made it difficult to access.

Even with the modifications and aftermarket parts, the PML pan fit great. Video of this installation available on YouTube: https://youtu.be/LmYAk02_pLE

2020 Silverado 1500 with PML rear differential cover   stock pan   tool for accessing bolts behind aftermarket exhaust  

exhaust   loosening exhaust pipes to make space   jacking up transfer case  

OEM pan dropped and draining   PML provides new, longer mounting bolts   PML 8L90 pan installed

Fluid fill is on passenger side of transmission case   PML 8L90 pan fits great, no clearance issues   PML 8L90 pan on 2020 Silverado 1500

Click on image to view larger in a new tab or window.

2019 Colorado 8L45

Troy installed this PML transmission pan on his 2019 Colorado 3.6l ZR2 Bison with an 8L45 transmission and AEV boron skid plates.  He needed to switch to AEV Boron Skid Plates PN 58060005AA to gain enough clearance for the larger PML pan.

Troy liked the thickness of the PML pan and that the machine work is spot on and hardware kit works perfectly.

2019 Colorado ZR2 Bison   OEM pan part number   GM 8L45 OEM pan and skid   OEM level check stand off pipe   PML level check stand off pipe   PML pan clears exhaust   PML pan with new skid plate   PML pan fits with new skid plate
Click on image to view larger in a new tab or window.

2017 Canyon 3.6 Gas Engine 8L45

Bruce installed this PML transmission pan on the 8L45 in his 2017 GMC Canyon Denali 4WD 3.6 gas engine truck. Bruce borrowed a friend's lift to make the installation easier. They needed to loosen the exhaust at the manifold to lower the cross over pipe. Installation was straight forward. He selected the longest PML level check pipe. He added about 4 extra quarts. He used an 8L90 fill tube he got on Summit Racing. The passenger side of the pan has a 1/8 NPT for a future temperture sending unit. He also wrapped his exhaust while the truck was on the lift.

The truck has a factory skid plate, which is not shown in the pictures. He removed the skid plate to install the PML pan and reinstalled a few days later. Bruce reported that the skid plate fits find with the PML pan.

2017 Canyon gas engine truck with 8L45 transmission   stock pan on truck   lowered exhaust to removed stock pan   GM part number on original transmission pan   level check stand off pipe inside stock pan   PML pan level check stand off pipe   PML pan installed   Magnetic drain plug on the side of the PML pan
Click on image to view larger in a new tab or window.

Locations of 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, level check hole, and optional machining locations   plugs 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.

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.

8L45, 8L90 trans pans stand off 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 and PML pan with stand off 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.

Included with PML 8L90 Pan

Included with PML 8L90 pan, shown in cast   Included with PML 8L90 pan, shown in black powder coat  Click on image to view larger.

PML includes new mounting bolts, magnetic drain plug and washer, new mounting bolts and washers, and level check plug and barbs.

Inside of PML 8L90 Transmission Pan

Inside of PML 8L90 pan, Click To View Larger Image   Inside of PML 8L90 pan, location of filter supports, drain and level check, Click To View Larger Image   Click on image to view larger.

Filter

GM 8L90 filter pick up   GM 8L90 filter top   GM 8L90 filter box label   Post on GM 8L90 filter goes in slot in transmission
Click on image to view larger.
Installer is responsible for verifying filter and fitment. Information for reference only.

This PML transmission pan works with the OEM filter. This is the OEM filter, GM part number 24274402.

The filter rests on ledges on the raised above the bottom of the pan so the filter is supported. Both the PML pan and OEM pans have ledges. The ledges on the PML pan are at the same distance from the flange as the ledges on the OEM pan. The annotated picture of the inside of the PML pan has arrows indicating the filter support ledges.

The filter has a post on it that fits into a slot on the transmission.

The filter also has a metal spring on the top. When installing a pan, it can be necessary to push on the pan a bit to compress the metal spring.

Gasket

This PML pan works with the OEM gasket. Shown here is the OEM gasket, GM part number 24260071.
GM 8L90 gasket  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 8L45, 8L90 transmission with filter   GM 8L90 Transmission Pans, Click To View Larger Image   2019 Colorado 8L90 Transmission Pan, Click To View Larger Image   2020 Silverado 8L90 Transmission Pan, Click To View Larger Image
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.

 Click on image to view larger.

Measurements are approximate.