97740/42 | Banks CoolRunner Oil Pan for 2017-2024 Chevy/GMC 2500/3500 6.6L Diesel L5P

Raise the truck on a lift to provide ample access to the oil pan and the area you will be working with.

With a 15mm wrench, remove the stock drain bolt.

With a pan under the truck, drain the old engine oil.

Allow for all the oil to drain from the pan and engine passages. (about 30 min)

Carefully lower the forward shield, and place it to the side for now. Take care as there may be dirt or debris that falls.

Continue to the remaining 2 bolts for the rear splash shield.

Carefully lower the rear shield, and place it to the side for now. Take care as there may be dirt or debris that falls.

The transmission cooler brackets and hard lines will need to be temporarily disconnected and moved to the side to provide extra clearance during the install.

With a flathead screwdriver, disconnect the plastic transmission line support clip that holds the hard lines together.

Move to the driver’s side. With a 13mm socket, disconnect the transmission cooler lines.

A small amount of transmission fluid in the lines will leak out. Be sure to have a rag ready or a pan to catch extra transmission fluid that will leak from the fitting. It is a small amount and won’t need to be topped off.

Move to the passenger side. Remove the 10mm nuts that holds the transmission lines. There are three in total.

With a zip-tie or bungee cord, hold the transmission lines together and to the passenger side so they do not interfere with the removal and reinstallation of the oil pan.

The front axle will need to be lowered slightly and supported by a jack stand to provide clearance to install the new oil pan.

Once supported, start by removing the clip for the electrical connection.

Disconnect the harness from the steering rack.

With a 15mm socket, remove the two bolts. on the passenger side.

Located on the front differential casting, remove the two 15mm bolts on the driver’s side.

Carefully lower the front axel to provide additional clearance to reach the oil pan.

The front axle does not need to be fully removed; just lower it enough to access the bolts around the oil pan.

1. Remove the front cross brace

With an 18mm socket and ratchet on both ends, Remove the four bolts and nuts which mount the traction cross member.

With all 4 bolts and nuts removed, use a pry bar or similar tool and remove the cross member. You may need to use the pry bar on both sides.

The cross member will swing down and can be moved out of the way for now.

Take note of the orientation of the cross member so you can keep it the same when you re-install it later.

Remove the 15mm bolt from the transmission bell housing.

With everything now clear and out of the way, begin removing the 26 10mm oil pan bolts.

The lower pan is sealed with RTV, and will not fall down once unbolted from the upper pan.

The RTV used on the factory pan will need some encouragement to free itself from the engine. Use the supplied oil pan separator tool with your mallet.

Start on the rear right corner of the pan and take extra care. The cast upper oil pan can crack and fracture if too much stress is applied.

Hit the back of the separator tool to break the RTV seal.

With care, use a small pry tool to start freeing the lower pan from the upper pan.

The lower factory pan is an expendable piece and will be bent by the time it is removed. Just be sure not to gouge or damage the upper cast pan during removal.

Once the factory pan has been removed, carefully remove any remaining RTV from the underside of the upper oil pan.

You want the mounting surface to be completely clean of any oil, dirt, and old gasket material.

Take care to not scratch the surface of the upper pan, as gauges can cause leaks. Take your time on this step.

Thread in the 1/8NPT plug with a 5mm Alan hex key and ferrite drain plug into the CoolRunner Oil Pan.

The plug should be snug, don’t over tighten it.

Carefully run a 1/4″ bead of RTV along the inboard side of the pan mating surface, highlighted in red. There is a squeeze gap to help catch and ball up the excess.

Thread a few of the perimeter bolts in by hand to align and level the pan. But don’t fully tighten yet.

Once all the bolts have been threaded, torque them to 89 in-lbs

Install the new supplied 15mm bolt into the transmission.

Raise the axle back up with your floor jack, and align the bolts.