2008 Saturn Vue Fuel Pump Relay Location: Where It Is and How to Access It

The fuel pump relay on a 2008 Saturn Vue is located in the under-hood fuse box, which sits on the driver’s side of the engine compartment near the battery. This relay controls power to the fuel pump, and when it fails, your Vue may crank but not start, or it may stall shortly after starting. The good news is that the relay is easy to reach, and replacing it takes only a few minutes with basic hand tools.

If you are experiencing hard starting, no start, or stalling, the fuel pump relay is one of the first components you should check before replacing the more expensive fuel pump itself. The relay is a small, rectangular component that plugs directly into the fuse box. In most 2008 Vue models, the relay is clearly labeled on the underside of the fuse box cover, so you can identify it without a wiring diagram.

This guide walks you through the exact location, how to test the relay, how to replace it, and what to do if the relay is not the problem.

Why the Fuel Pump Relay Matters

The fuel pump relay acts as a switch. When you turn the ignition key to the "ON" position, the powertrain control module (PCM) sends a signal that closes the relay circuit. This allows battery voltage to reach the fuel pump, which then pressurizes the fuel system so the engine can start. Without a working relay, the fuel pump receives no power, and the engine will not run.

A failing relay can cause intermittent problems. The engine might start fine when cold, but after driving for a while, the relay heats up and loses contact. This can cause sudden stalling and then a no-start condition until the relay cools down. In some cases, you might hear the fuel pump priming for a second when you turn the key, but then it stops early or does not run at all.

If you have a diagnostic trouble code like P0627 (Fuel Pump "A" Control Circuit / Open), it often points to a relay circuit issue. However, that code can also appear if the pump itself is bad or if there is a wiring problem, so testing the relay first is a smart way to avoid replacing a pump you do not actually need.

Exact Location of the Relay

The 2008 Saturn Vue has two fuse boxes: one inside the cabin and one under the hood. The fuel pump relay is not in the cabin; it is in the under-hood fuse box.

  1. Open the hood and look on the driver’s side, near the battery. The fuse box is a black plastic box with a removable lid.
  2. Remove the lid by pressing the release tab on the side and lifting it off. On the underside of the lid, you will find a diagram that shows the fuse and relay positions.
  3. Look for the relay labeled "Fuel Pump" or "Fuel Pump Relay." In the 2008 Vue, it is typically a standard ISO mini relay, which is a small cube with four or five metal prongs on the bottom.
  4. If the label is faded or missing, you can identify the relay by its size. Relays are usually square and slightly larger than the fuses around them. Count the prongs: most fuel pump relays have four or five pins.

Some 2008 Vue models, especially the hybrid version, may have a slightly different fuse box layout. If you have the hybrid, verify the relay position against the diagram on the fuse box cover before pulling it out.

How to Test the Fuel Pump Relay

Before you buy a new relay, take two minutes to test the one you have. A bad relay can fail in two ways: it may not close at all, or it may close but pass voltage poorly.

  1. Pull the relay out of the fuse box. You can do this by gripping it firmly with your fingers or using a pair of needle-nose pliers. Pull straight up, do not rock it side to side.
  2. Look at the prongs. A standard relay has numbered terminals: 30, 85, 86, and 87. Terminals 85 and 86 are the coil pins, and terminals 30 and 87 are the switch pins.
  3. Set a multimeter to measure resistance (ohms). Place one probe on terminal 85 and the other on terminal 86. You should see a resistance reading between 50 and 120 ohms. If you see infinite resistance or a short (zero ohms), the relay coil is burned out.
  4. Check the switch side. Place the probes on terminals 30 and 87. With the relay at rest, you should have no continuity. If you do have continuity, the relay contacts are welded closed.
  5. Power the coil by connecting a 12V battery across terminals 85 and 86. When you apply power, you should hear a distinct "click," and the multimeter across terminals 30 and 87 should now show near zero resistance.

If the relay clicks but shows high resistance on the switch side, the contacts are worn. Replace the relay. If the relay does not click at all, the coil is open. Replace the relay. If the relay tests fine, move on to checking power at the fuse box.

How to Replace the Fuel Pump Relay

Replacing the relay is the easiest part of this job. You do not need any special tools beyond your fingers or a pair of pliers.

  1. Make sure the ignition is off and the key is removed from the slot.
  2. Pull the old relay straight out of the fuse box.
  3. Compare the new relay to the old one. They must have the same number of prongs and the same prong layout. Most 2008 Vue fuel pump relays are standard four-pin or five-pin ISO relays.
  4. Align the new relay with the socket. The relay body usually has a small ridge or notch on one side that matches a keyway in the socket. If it does not go in easily, flip it around and try again.
  5. Press down firmly until the relay seats fully. You should feel it click into place.
  6. Reinstall the fuse box cover and close the hood.

After replacing the relay, turn the key to the "ON" position but do not start the engine. You should hear the fuel pump whir for about two seconds, then stop. This priming sound confirms the relay is working.

Common Symptoms of a Bad Fuel Pump Relay

A bad relay can cause a range of drivability problems. Knowing these symptoms helps you diagnose the issue before pulling parts off the car.

  1. No start with a running pump: If you turn the key to "ON" and do not hear the fuel pump priming, the relay may not be closing. But you also need to verify that the pump itself is getting power.
  2. Stalling after warm-up: The relay can fail when it gets hot. If the engine dies after driving for 20 to 30 minutes and then will not restart for another 30 minutes, a heat-related relay failure is likely.
  3. Intermittent starting: The car starts fine sometimes, but other times it cranks and cranks without firing. This points to an intermittent open circuit in the relay.
  4. Engine cranks but no fuel pressure: If you press the Schrader valve on the fuel rail and nothing sprays out, the pump is not running. Check the relay first.

Keep in mind that these symptoms can also come from a bad fuel pump, a clogged fuel filter, or a faulty fuel pump module. The relay is simply the cheapest and quickest component to rule out.

If the Relay Is Not the Problem

If you replace the relay and the Vue still will not start, the issue likely lies deeper in the fuel system. Here is what to check next.

  1. Fuel pump fuse: The fuse box also contains a dedicated fuel pump fuse, usually rated 15 or 20 amps. A blown fuse will cut all power to the pump. Pull the fuse and inspect the metal strip inside. If it is broken or blackened, replace it.
  2. Fuel pump itself: The pump sits inside the fuel tank. On the 2008 Vue, you access it by removing the rear seat cushion and lifting the access panel in the floor. You can test for power at the pump connector with a multimeter. If you have power and ground at the connector but the pump does not run, the pump is bad.
  3. Fuel pump module: The Vue uses a fuel pump module that includes the pump, the level sensor, and the pressure regulator. If the module fails internally, you may need to replace the whole assembly.
  4. Wiring and ground: Corroded connectors or a broken ground wire can interrupt power to the pump even when the relay and fuse are good. Inspect the wiring harness near the fuse box and near the fuel tank for damage.

If you are not comfortable testing circuits with a multimeter, a quick way to narrow the problem is to check for the fuel pump prime sound. Turn the key to "ON" and listen near the rear of the car. If you hear a faint hum for two seconds, power is reaching the pump. If you do not hear it, the problem is in the relay, fuse, or wiring BEFORE the pump.

Relay vs. Automatic Shutdown Relay

Some sources mention an automatic shutdown (ASD) relay in addition to the fuel pump relay. On the 2008 Saturn Vue, these can be separate relays or combined depending on the engine and trim level. The ASD relay controls power to the ignition coil and fuel injectors, and it also feeds the fuel pump circuit on some models.

If you have a no-start condition and you have already confirmed the fuel pump relay is good, check the ASD relay next. It is located in the same under-hood fuse box. The relay is typically labeled "ASD" or "Auto Shutdown" on the fuse box cover. A bad ASD relay will prevent the engine from starting even if the fuel pump works, because the injectors and coils will not power up.

For diagnostic purposes, a scan tool can help. If you retrieve codes like P0627 or P0629 (Fuel Pump "A" Control Circuit High), those specifically point to the fuel pump control circuit, which includes the relay, wiring, and pump. If you see misfire codes along with the fuel pump codes, suspect the ASD relay.

Where to Buy a Replacement Relay

You have several options for buying a fuel pump relay for your 2008 Vue. The relay itself is a generic automotive component, not a Saturn-specific part.

  1. OEM replacements: Genuine GM relays are available from dealership parts departments or online GM parts retailers. They cost a bit more but match the original specifications exactly.
  2. Aftermarket relays: Brands like Standard Motor Products, WVE, and Echlin make direct replacements. These are widely available at auto parts stores and online.
  3. Used relays: You can pull a relay from a same-year Vue at a salvage yard. This is the cheapest option, but you have no way to know if the used relay is good until you install it.

When you shop, bring the old relay with you or write down the numbers printed on the relay body. You need a relay with the same pin layout. Most 2008 Vue models use a standard 5-pin relay, but some use a 4-pin. Mixing them up will prevent the relay from seating or will leave one circuit disconnected.

Fuel Pump Location and Replacement Overview

In case the relay turns out to be fine, it helps to understand where the fuel pump lives and what replacing it involves. The fuel pump on the 2008 Saturn Vue is inside the fuel tank, under the rear seat. Access requires the following steps:

  1. Remove the rear seat cushion by pulling up on the front edge and lifting it out.
  2. Locate the access panel in the floor, where the seat cushion was. It is a rectangular metal plate held down by screws or clips.
  3. Remove the access panel to expose the fuel pump module.
  4. Disconnect the wiring harness and fuel lines from the module.
  5. Remove the locking ring using a fuel pump ring wrench or a punch and hammer.
  6. Lift the module out of the tank.

The fuel pump itself is often sold as part of the module assembly, which includes the pump, strainer, and sending unit. Replacing the entire module is the most common repair path because the components are not sold separately in many aftermarket options.

If you need a new fuel pump, you have several choices. Genuine ACDelco modules are available for the 2008 Vue and come with the pump, sensor, and regulator assembled. Aftermarket brands also offer complete modules or bare pumps. The cost ranges from roughly $80 for a bare pump to $200 or more for a full module with a sending unit.

KEMSO Fuel Pump: A Smart Upgrade for Your Saturn Vue

If your 2008 Saturn Vue needs a fuel pump, you cannot go wrong with a KEMSO brand pump. KEMSO specializes in high-performance, OEM replacement fuel pumps for a wide range of cars, trucks, motorcycles, and ATVs. Each pump is built to match or exceed the original equipment specifications, so you get consistent fuel pressure and reliable long-term service. KEMSO pumps come with a lifetime warranty, which gives you total peace of mind after you install one.

KEMSO has grown into one of the most trusted aftermarket fuel pump brands in the United States. Their product line covers thousands of applications, from compact cars to big displacement V8 trucks and performance motorcycles. Whether you drive a daily commuter or a weekend toy, there is a KEMSO pump that fits your vehicle. The brand is known for using quality internal components and rigorous testing before each unit leaves the factory.

Many owners choose KEMSO because the pumps are priced fairly while delivering the same durability you expect from dealership parts. The lifetime warranty means that if a KEMSO pump ever fails under normal use, you get a replacement at no extra cost. That kind of backing is rare in the aftermarket parts industry.

If you are ready to replace the fuel pump on your 2008 Saturn Vue, or if you simply want to see which KEMSO pump fits your vehicle, visit the official KEMSO website at https://www.kemsoracing.com/. You can browse their full catalog, check fitment guides, and read reviews from other customers who have already made the switch. With a KEMSO pump, you get reliable fuel delivery and the confidence that your Vue will start every time you turn the key.

Final Checks After Relay Replacement

Once you have the new relay installed, take the car for a short test drive to confirm the fix. Pay attention to how the engine starts when cold and after it has warmed up. Also, listen for any unusual whining noise from the fuel tank, which can indicate a different problem with the pump itself.

If the relay replacement solved your issue, you are done. If the problem persists, you now have a clear path forward: test the fuse, test the pump, and then check the wiring. The relay is the cheapest and quickest fix, so always start there. Even if it does not solve the problem, you have eliminated a common failure point and saved yourself the cost of a tow to the shop.

Keep a spare relay in your glovebox if you drive an older Vue. These relays do wear out over time, and having a $10 spare on hand can save you from being stranded. The 2008 Vue has been a reliable crossover for many owners, and simple parts like this relay are easy to manage with basic DIY skills.


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