Today on our 2005 Chevrolet Avalanche, we'll be installing the Derale Transmission Cooler, part number D12906. We'll also be using the Derale Universal Mount Kit, part number D13002 and the GM Radiator Adaptor, part number D13035.Now our truck has had some modifications so the removal of the grill is different than normal, so we will not be showing it. With our grill out of the way, we'll go ahead and test fit the cooler.After finding a good spot for our cooler, using a couple of bolts and nuts we purchased separately, we'll attach the Derale brackets to the cooler. At this point, we want to leave the brackets loose until theyre mounted to the vehicle. We can go ahead and attach the rubber line to the cooler as well using two of the worm clamps. It also may be necessary to use some transmission fluid as lubricant to get the line around the fittings.We can now tighten down the worm clamp securing the rubber line to our cooler.