How to Replace Throttle Body 2000-06 Chevy Tahoe

All right. We want to disconnect the battery. Disconnect the negative cable, use an 8-millimeter ratchet wrench or a wrench, and slide that out of the way. All right. We're going to take this engine cover off. You can use an 8-millimeter socket and loosen up the screw right here. Slide it up and slide it out. We want to disconnect the battery. Disconnect the negative cable. Use an 8-millimeter ratchet wrench or a wrench and slide that out of the way. Now loosen up this worm clamp right here. You can use a straight blade screwdriver. And then also right here on the mass airflow sensor.

And then there's a little bracket right here holding the upper radiator hose on. This one's broken but just get in here with your screwdriver or pry tool and just pry that off and just grab the intake snorkel and just rock it back and forth. Slide it forward and take it off over here. Slide it out of the way. Disconnect the connector right here. There's a little lock tab. You got to slide this back, this little gray piece. Just to there, or you can take it off completely and then push down on this tab. Slide the connector off. Now there are three nuts that hold the throttle body on. Just use a 10-millimeter socket to take those nuts off.

All right. So you're going to notice that you can't take the throttle body off yet because the coolant hose has to go through it. You want to make sure that the engine is cool when you do this. You don't want to do this when the engine is hot because when you take those off, then it's going to blow off and it could potentially hurt you. So what we're going to do is the engine is cool and we're going to take these hose clamps or hose shutoffs, and we're going to install these so that we don't lose a lot of coolant.

If you don't have these, you can just let it drip out. But then you're going to have to top off the coolant a little bit more and potentially have a pan underneath to catch the coolant. So we'll have minimal coolant loss if we close these off. So put one on the hose right here, and then we'll put one on this hose as well. All right. Now we can pop these coolant hoses off, just use some coolant pliers, or you can use regular pliers as well. Just move this over and then take the line off. You can twist the line, see if it comes off or you can take a 90-degree pick and try to get it to loosen up. Just taking a peek and just trying to get underneath it.

And now I can twist it. Slide it off and it actually didn't even lose any coolant. Now I'm going to pop the other hose off and you can always use some hose pliers and just try to wiggle this off just like that and slide the throttle body right off. Now just use a pick. You can get behind the gasket and just slide it off. Take a new gasket, line it up. That's good. Take the new throttle body. Go over the studs then we can line this lower hose up first. It's just easier to do this before you put the nuts on. That's on. Now we can move that clamp over and take the other hose, line that up and move the clamp over for that one. That's good. It's back in position.

Now that those are all hooked up, you could actually take these hose crimpers off and take the nuts, put the nuts back on, and then we can torque these nuts to 89 inch-pounds. Make sure you're on inch-pounds, not foot-pounds. Now you can plug the electrical connector back in, line it up, and then push down on the lock tab. That's good. And take the snorkel, line this back up. Put it over the throttle body and over the airbox or the mass air sensor. Tighten up the worm clamp. Just snug it up. Just make sure it's not loose. And then do the same over here.

And then take this cover, put this back in position, and get that bolt in. And at this point, you want to check your coolant level and if it's down at all, you want to adjust that. And then even after the engine warms up a bit, double-check your coolant level. Now we can hook up the battery. Line it up, get it started and snug it up. Just make sure it's not loose. That's good. When you're done this procedure, it's always a great idea to hook up a scan tool where you can monitor the values of the throttle body and watch the activation of it when you activate the accelerator pedal and see how those values look. Make sure there are no spikes or anything.

Everything else should be good. And I always run the vehicle for about three minutes at idle, just making sure everything's good, make sure everything responds good. You should be good to go. Now we can kook up the battery. Line it up, get it started, and snug it up. Just make sure it's not loose. That's good.