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Derale Series 9000 Transmission Cooler Installation - 2003 Chevrolet Avalanche

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How to Install the Derale Series 9000 TranSMIssion Cooler on a 2003 Chevrolet Avalanche

Today, in the Chevy Avalanche well be installing the Derale Series 9000 Plate-Fin Transmission Tool Kit, part number D13611. To begin our install, well first go ahead and open the hood. Then remove the three push-pin fasteners going across the top of the engine bay. To remove these fasteners well use our flat blade screw driver and pry out on the center of the fastener and then completely remove it. Next, using a plastic pry tool or a flatbed screwdriver, and begin working the front clip off as itll unlock the fasteners underneath. Starting on the corners first and then working our way towards the middle.

Now, with our fasteners free well go ahead and remove the front clip and set it aside for reinstallation later. Now, weve exposed the area where well be mounting the new cooler. Next, well go ahead and prepare to install the cooler. First, well need to install the supply nipples. Before, we install them though were going to go ahead and add some thread tape going around the threads to help seal it up between the nipple threads and the new cooler.

Once, we have the thread tape in place well go ahead and tighten the nipple into the cooler. Now, with the first one done were ready to go ahead and install the hose. At this point well just go ahead and install one end of the hose and one clamp to secure it. Quick tick tip: I recommend you use some transmission fluid as lubricant as well put it over the barbs and the nipple and a little on the hose, so that we can slide it on easily. Once weve got it slipped into place well go ahead and clamp it down using the new clamp provided with the install kit.

Now well go ahead and repeat the same process on the other side. With both hoses installed and secured, well go ahead and set the cooler into position up against the front A/C condenser. Then, well go ahead and take the rod pad and clip to secure the new transmission cooler to the A/C condenser. To do this well go ahead and remove the adhesive cover on the foam pads and secure them behind the mounting points of the pre-drill holes and the cooler. Well start with two first till we get our cooler in position.

Now, with the two on well go ahead and take the rod go through the cooler, through the pad and then through the condenser. Putting our clip on the backside and securing it to the condenser. With the bottom undone well go ahead and do the top one. Now, well move over to the other side and repeat the same process.Once we have the clips tightened to the rods and secured the condenser well go ahead and cut off the access from the rod. Youll need to locate the cool side of the transmission cooler. This will be the side where the transmission fluid will come out of the manufacturers radiator. To locate it recommend a start to vehicle, putting gear with your foot on the brake and ran to about 2000rpms for one minute then, gently touching the transmission cooler lines to see which one will be cooler. That will be the cold side of the manufacturers transmission cooler. As the fluid comes out of there well then go into the Derale transmission cooler and then back in line with the manufacturers set up. Since weve already done that we know on this application the cool side will be coming out of the bottom of the two transmission cooler lines from this radiator set up. To connect our cooler in line, well go ahead and remove the manufacturers transmission line from the radiator. To do this, well pull back on the plastic cover exposing the small clip that secures the line in position. Then using a flat blade screw driver get underneath the clip and remove it and pull the line out. Then using the Derale Snap-In Radiator Adaptor, part number D13035 we can go ahead and install it into the radiator and make sure its a good fit. Once weve identified a good fit we can then run the new hose down to it, mark it and cut the length. Now, well go ahead and slide the new clamp onto the hose and the radiator adapter into the hose. Then, well go ahead and secure it and reinstall into the radiator. Then well take the line that we remove from the radiator and our new hose that we ran from the transmission cooler, mark and cut the length. Next, using some lubricant we can go ahead and lube up the line in the hose, install the new clamp onto the hose and the hose onto the manufacturers steel line. Once we have the new hose on the line, well go ahead and clamp it down. Next, well go and take some black zip ties to secure the routing of our hoses and lines. Next, well go ahead and cut off the excess from the zip ties and clean up our install look and were ready to reinstall the front fascia. Note; at this time, I recommend to go ahead and start the vehicle bringing the transmission up to operating temperature and check for leaks. Once youre sure there are no leaks, well go ahead and re install the front fascia. This will complete the install of the Derale Series 9000 Plate-Fin Transmission Cooler Kit part number D13611 along with the Derale Snap-In Radiator Adapter Fitting, part number D13035 on our 2003 Chevy Avalanche. .

Questions and Comments about this Video

Kameron H.

Would the lower cooler line be the bottom on the radiator be the cold line on a 2002 chevy avalanche just like in the video

Etrailer Expert
Reply from David B.

Yeah, they lower line will be the cooler line the top is the hot.

Reply from Kameron H.

@DavidB thank you very much

Etrailer Expert
Reply from David B.

No problem.

Info for this part was:

Employee Patrick B
Video Edited:
Patrick B
Employee Jacob T
Video Edited:
Jacob T
Employee Dustin K
Video by:
Dustin K
Employee David F
Installed by:
David F

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