What Is Under My Hood 2010-17 GMC Terrain

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What we have here is a 2013 GMC Terrain. Under the hood GM wants it to look pretty for you so they put covers on everything and that way it's a little bit difficult to find all of the important things that you need to know. Today we're going to go over some of those things.

To start off with, there's an engine cover over your engine. We want to get under that. There's one T27 Torx bolt on the top that holds that in. As soon as you remove that which is pretty easy, you can take off the oil cap like that and then if you just pull up on it, you can pull it right out of the truck. You can see there's some rubber push pins on the cap that holds down and we'll get that out of the way. Once you have that off it's always good to put the cap back on the oil because you don't want to drop anything down there accidentally.

So this is your engine, it's a V6 and this is where you put your oil when you're doing an oil change or if you're topping off the oil. Right down here is your dipstick with the yellow handle. So that checks your oil level.

Up here is your power steering pump reservoir so if you're power steering is leaking or if you wanted to just check the fluid level or the condition of it, right here is where you do that. Over here is your brake fluid. Sometimes when you do a brake job you may want to bleed the whole system and you want to put new brake fluid in. That's where you do it.

Then there's a variety of sensors on the engine that are probably worth noting. Right here is your MAP sensor. That's a fairly commonly replaced item on a lot a different vehicles. They sometimes will go bad. It'll set a check engine light. Over here you have your throttle body. This is a drive by wire setup. Rather than having actual cable going from your gas pedal all the way up to the throttle body, you have wires. Inside the throttle body is a little motor that opens and closes the throttle when you push the gas pedal down. Up here, you’ve got your mass air flow sensor. It hooks into your intake and it measures the air coming in your engine so the engine knows how much air is going into it.

Down here you got your ignition coils. There's one, two, three on this side and then on the back side of the engine which you can't really see very well there's three more. Because there's six cylinders so you have six ignition coils on this engine.

Over here, you’ve got your computer. This is the thing that actually makes your engine run. It sits right on top of your battery. So if you look down here you can see one of the battery terminals. If you need to replace your battery this is where it is. You pop the computer out of the way and you can lift the battery right out and replace it.

Speaking of the battery, we have the battery terminals right here and here. So this is where you would jumpstart the car if your battery was dead. You have your positive terminal right here in red and your negative is right down here in black. So you'd put your battery cables right on there to jumpstart it.

Right here is your washer fluid reservoir. So you don't want to get it mixed up with anything else. If you put washer fluid in your engine you're going to have a bad day. Right here is where you fill your washer bottle up. They usually hold between a half gallon and a full gallon of washer fluid. Right here is your coolant overflow reservoir. You never want to open this when the engine's hot because it will actually explode out on you. So you only want to open it when it's cold. You can see this one has Dex-Cool which is the red antifreeze. So you always want to put the red antifreeze back in you never want to mix antifreezes because they don't mix well. Sometimes it'll create goo inside your engine which is never a good thing.

Right here is your fuse box. You can pop this open. If you ever have any blown fuses, so if your blower motor wasn't working or your fuel pump wasn't turning on or something like that, this is where you find all of the fuses. And you also find a lot of relays under here. These big ones, these are relays. This basically takes a small amount of electricity and allows it – it's basically a switch. There's low electricity on one side and big electricity on the other and it is – the lower voltage allows the big voltage to basically open and close. It's science. Basically these are relays, these are your fuses, this is where you'll find all the fuses that make your car go. And under the fuse box here's the list of what the fuses are and where they're located in the fuse box.

That way if you drop a dime in your cigarette lighter you can go down here and find your cigarette lighter fuse, pull the fuse out and you'll find it blown, you replace the fuse and you're back in business. Speaking of replacing fuses, this tool right here is, it comes with just about every car and it's intended to clip on the fuse and then pull it out. It's a pretty cool little device. If you're ever in a junkyard, it's kind of fun to take some extra ones in your toolbox and that way you have them for any car that's missing them because typically these things are missing with every used car that you buy. Make sure you put it back because it's nice for the next guy. Put this back on. It just pushes straight down.

Right here this aluminum line here with a little cap on, this is one of your AC lines and if you follow it over you'll actually see the other A/C line right here. It's a bigger one and it also has a cap. If you ever have your A/C serviced, that is where they hook up the machine to it to feed their refrigerant back in. You always want to be careful with those because they are aluminum and they bend really easily and they do have a high pressure refrigerant in them that is not good to let out into the atmosphere and it's also not good to get on your skin. So you always want to be careful of those lines. Never ever put a jumper cable on this as a ground because you could cause damage to it and you could actually cause damage to a variety of things. Make sure if you're using your jumper cable you always use the battery terminals to jump it with, don't ever touch anything onto this.

You can actually follow the lines over here and you'll see the aluminum A/C lines actually go all the way down to the front side of your engine where the AC compressor is. The A/C compressor is just moving the refrigerant through your AC system and that's what allow your AC to get cool.

Over here we have your air intake box. As I said, the mass air flow sensor is right here and under this box is your air filter. There's T25 Torx bolts holding it down. I believe there's four of them. There's one here, here, one back here and then one up here. So to replace your air filter you would take those bolts out and flop this over and you could get your air filter. That is a pretty good summary of what's under your hood of your 2013 GMC Terrain and hopefully this helps you out.

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What Is Under My Hood 2010-17 GMC Terrain

step 1 :Removing the Engine Cover

step 2 :Checking the Fluid Reservoirs

step 3 :Locating the Sensors

step 4 :Locating the Electronic Parts

step 5 :Checking the Remaining Fluid Reservoirs

step 6 :Locating the Fuses

step 7 :Locating the A/C Parts

step 8 :Checking the Engine Air Filter

Tools needed

Noisy Car or Truck Wheel While Driving Could be a Bad Wheel Bearing

What Is Under My Hood 2010-17 GMC Terrain

step 1 :Removing the Engine Cover 0:20

step 2 :Checking the Fluid Reservoirs 1:21

step 3 :Locating the Sensors 2:01

step 4 :Locating the Electronic Parts 2:43

step 5 :Checking the Remaining Fluid Reservoirs 3:34

step 6 :Locating the Fuses 4:17

step 7 :Locating the A/C Parts 6:02

step 8 :Checking the Engine Air Filter 7:14

Tools needed

Noisy Car or Truck Wheel While Driving Could be a Bad Wheel Bearing

step 1 :Removing the Engine Cover

step 2 :Checking the Fluid Reservoirs

step 3 :Locating the Sensors

step 4 :Locating the Electronic Parts

step 5 :Checking the Remaining Fluid Reservoirs

step 6 :Locating the Fuses

step 7 :Locating the A/C Parts

step 8 :Checking the Engine Air Filter