How to Replace Transmission Oil Cooler 2000-13 GMC Yukon

All right. Let's remove this panel. I'm gonna use a trim tool, take these clips out. All right. Take this panel off. Take this bolt out, use a 10-millimeter socket. And there's four of these twist retainers. Just take a Philips-head screwdriver and just twist it about a quarter of a turn. And there's another one down here underneath, and two over here as well. And just grab the trim over on the side. You're just gonna pull it forward. Just like that. It's clipped in right there on the sides. Do the same for the other side. And just slides right off.

All right. We need to disconnect these cooler lines from the cooler. Now these are pretty rusted, but just take a straight blade screwdriver. Try to get this cover off. Just be careful. Pry this down and there's a clip in here. You can use a pick. It's clipped in right here. Try to get underneath the pick, underneath the clip. Now normally, you wanna save this and reuse it. But in our case, we're gonna replace the cooler, so doesn't matter. Take that clip off and then you just take the line. Wiggle the line back and forth. This one's pretty rusty and you're gonna pull it straight down. And then you'll do the same with the other side. Now if your lines are this bad, you're gonna need to replace the lines as well. We're just gonna have to cut these. Now there's two push pins on both sides of the cooler. Just use a trim tool, take those push pins out. And take a 10-millimeter socket, take these 2 bolts out. And slide the cooler out.

Some of the factory brackets might not line up quite right. You may have to ream this hole out a little bit or use a stepper bit. Just make it a little bit bigger. Make the hole a little bigger, just like that. Now this is a updated design. It's a little bit different. There are some slots on the bottom of this cooler. Those slots are gonna line up with those holes. Take those old bolts that were mounted up there. Can use those down here. And tighten those down. Snug them up. Now take this little cover off here, if you have one of those, and slide this in place, and lock it in. Make sure it locks in all the way, if you had to reinstall that retainer there. And put the cover on. Take that plug off. Get this lined up. Lock it in place. Put the retainer over there. Cover.

All right. Take the grille and line it up. Get this lined up on the side. And just twist these. There's four of them. And take this bolt. Get that started. And tighten it down. And put this cover back on, and take all the pushpins. Put all the pushpins back in. After you're done, you're gonna wanna check the transmission fluid level. Start the vehicle, let it run. Pull this dipstick out, wipe it off. And there's two areas right here. This is the hash marks where the fluid level should be when it's hot, and when it's cold, should be down here. You can top off the fluid with the appropriate fluid. Get that information from your owner's manual and adjust accordingly.