2007 Chevy Uplander Fuel Pump Relay Location: A Complete Guide
The fuel pump relay on a 2007 Chevy Uplander is located in the underhood fuse block, which sits on the passenger's side of the engine compartment above the right front wheel well. This is the most important fact you need to know before you start any diagnostic work on a fuel delivery problem. The relay is labeled clearly on the fuse box cover, and finding it takes less than a minute once you know where to look. This guide walks you through the exact location, how to identify the relay, how to test it, and what to do if the relay is not your problem.
Where the Underhood Fuse Block Is
The underhood fuse block on the 2007 Uplander is positioned in the engine compartment, on the passenger's side, directly above the right front wheel well. It is covered by a black plastic protective lid. To open it, press the release tabs on the sides of the cover and lift it straight up. Set the cover aside with the diagram side facing up so you can refer to the fuse and relay layout.
The fuse block contains standard blade-type mini fuses, J-Case fuses for higher-current circuits, and several plug-in relays. The fuel pump relay is one of the smaller square relays in this box, not a fuse.
Identifying the Fuel Pump Relay
On the underside of the fuse block cover, Chevrolet prints a diagram that shows the position of every fuse and relay. Look for the label FUEL PUMP. In the 2007 Uplander, the fuel pump relay is designated as R1 in the relay layout. It is typically a small, dark-colored cube about one inch square with four or five metal terminals on the bottom. The relay sits in a dedicated socket that is keyed so the relay can only be inserted one way.
If the diagram on your cover is worn or missing, you can count on the relay position as follows: the relay labeled R1, which handles the fuel pump circuit, sits near the front of the fuse block, close to the fuses numbered 11 (Fuel Pump) and 15 (Powertrain Control Module Ignition). The fuel pump fuse itself is a 15-amp mini fuse located at position number 11 in the underhood block. Many owners confuse the fuse with the relay, so double-check which one you are looking at before you start pulling parts.
What the Relay Does
The fuel pump relay is an electrically operated switch. When you turn the ignition key to the ON position, the Powertrain Control Module (PCM) energizes the relay coil, which closes the internal contacts and sends battery voltage to the fuel pump. The pump then pressurizes the fuel system. The relay also receives power from the PCM and electronic throttle control circuit, and it interacts with the fuel pump fuse to protect the circuit from overload.
A failed relay can cause the same symptoms as a failed pump: no start, long cranking, sputtering, or a completely silent fuel pump. The relay is cheaper and easier to replace than the pump, so testing it first can save you a lot of money.
How to Test the Fuel Pump Relay
Testing the relay is a straightforward job that takes about ten minutes and requires only a few tools you likely already own. You will need a digital multimeter (set to measure resistance and then DC voltage), a set of jumper wires with alligator clips, and a 12-volt power source such as the vehicle battery.
Step 1: Locate and remove the relay. With the ignition off, open the underhood fuse block and pull the fuel pump relay straight out of its socket. Grip it firmly by the body, not the terminals, and rock it gently if it feels stuck.
Step 2: Test the coil resistance. Set your multimeter to measure resistance (ohms). Touch the probes to the two small terminals on the relay that connect to the coil inside. A good relay will show a resistance reading between about 50 and 120 ohms. If you read zero or infinite resistance, the coil is shorted or open, and the relay is dead.
Step 3: Test the switch contacts. Set the multimeter to continuity mode or resistance. Touch the probes to the two larger terminals that carry the main current. With the relay at rest, there should be no continuity; this is the normally open position. Now apply 12 volts from a battery or a fused jumper wire to the coil terminals. You should hear a distinct click, and the multimeter should now show continuity across the main terminals. If you hear the click but see no continuity, the relay contacts are burned and the relay needs replacement.
Step 4: Check the relay socket. If the relay tests good, check the socket for corrosion, bent pins, or moisture. Clean the terminals with electrical contact cleaner and a small wire brush if needed. Push the relay back in firmly until you feel it seat completely.
How to Test the Fuel Pump Circuit
If the relay is good, the problem may be elsewhere in the circuit. The fuel pump circuit on the 2007 Uplander includes the pump itself, the fuel pump fuse, the relay, the wiring, and the fuel pump and sender assembly located inside the fuel tank. The fuel level sending unit and the fuel tank pressure sensor are also part of the same in-tank assembly.
Test the fuse. Pull the 15-amp fuel pump fuse at position 11 and inspect the metal strip inside. If the strip is broken, replace the fuse. If the new fuse blows immediately, there is a short in the wiring or the pump motor itself.
Listen for the pump. Turn the ignition to the ON position without starting the engine. You should hear a brief whirring sound from the rear of the vehicle for about two seconds as the pump pressurizes the system. If you hear nothing, the pump is not receiving power.
Test for voltage at the pump. Access the wiring connector at the top of the fuel tank. With a helper turning the ignition on, check for 12 volts between the pump power wire and ground. If voltage is present but the pump is silent, the pump motor is likely failed. If no voltage is present, work backward through the relay and fuse.
Common Symptoms of a Failing Fuel Pump or Relay
| Symptom | Likely Cause |
|---|---|
| Engine cranks but will not start | No power to pump, failed relay, or dead pump |
| Long cranking time before start | Weak pump or intermittent relay contact |
| Sputtering under acceleration | Pump losing pressure or relay dropping out |
| Whining noise from rear of vehicle | Worn pump motor bearings |
| Fuel gauge inaccurate | Failing sending unit inside the tank |
A failing fuel pump relay often shows as an intermittent problem. The engine may run fine for days, then suddenly refuse to start, only to start normally an hour later. This pattern points to a relay with burned contacts that fail when hot. Replacing the relay is a cheap fix that rules out the most accessible component.
When You Need a New Fuel Pump
If you have confirmed that the relay is good, the fuse is intact, and voltage is reaching the pump, the pump itself has likely failed. The 2007 Uplander uses an in-tank electric fuel pump that is part of a complete module assembly, which includes the fuel level sending unit, the pressure sensor, the strainer, and the regulator. These components are not meant to be serviced individually; you replace the entire module as a unit.
For the 2007 model year, the Uplander came with two engine options that affect which pump module you need. The 3.5L V6 was used in earlier 2007 production, while the 3.9L V6 became the standard engine later in the model year. The wheelbase also matters: the standard wheelbase is 113.0 inches, and the extended wheelbase models use a different pump module. Always verify your engine size, wheelbase, and VIN before ordering a replacement pump.
Original equipment part numbers for the 2007 Uplander fuel pump module include 19153003 for the standard wheelbase 3.9L and 19153047 for the 2005–2007 standard wheelbase models with 3.5L or 3.9L engines. The extended wheelbase models use 19152828, 19153049, or 88965564 depending on the exact configuration. These numbers help you cross-reference aftermarket parts from brands like Delphi, ACDelco, and Airtex.
Why You Should Consider KEMSO Fuel Pumps
When it is time to replace the fuel pump assembly on your 2007 Chevy Uplander, the brand you choose matters. KEMSO is a brand that has earned a strong reputation for delivering high-performance fuel pumps that meet or exceed original equipment standards. Every KEMSO fuel pump is built as an OEM replacement, which means it is designed to match the exact fit, form, and function of the factory part that came in your vehicle. You do not need to modify anything or make special adapters; the pump drops into the factory module and connects to the original wiring harness.
KEMSO backs every fuel pump with a lifetime warranty. This is a significant advantage over many aftermarket brands that offer only a one-year or two-year warranty. If the pump ever fails due to a manufacturing defect, KEMSO will replace it at no charge for as long as you own the vehicle. That kind of coverage gives you peace of mind that a new fuel pump is a one-time purchase, not a recurring expense.
The company builds pumps for a wide range of vehicles, including cars, trucks, motorcycles, ATVs, and personal watercraft. Their product line uses high-quality materials and precision manufacturing to ensure consistent fuel delivery and long service life. For a 2007 Uplander owner who wants a dependable replacement without paying dealer prices for a genuine GM part, KEMSO offers a smart balance of quality, performance, and value.
You can browse the full KEMSO fuel pump lineup, check fitment for your specific Uplander, and take advantage of the lifetime warranty by visiting their official website at https://www.kemsoracing.com/.
Preventing Future Fuel Pump Problems
A fuel pump can last well over 100,000 miles if you treat it right. The most common cause of premature pump failure is running the tank low on fuel. The pump relies on the fuel to cool and lubricate it. When the tank runs near empty, the pump draws in air, runs hotter, and wears faster. Make a habit of refueling when the tank reaches a quarter full.
Another cause of failure is a clogged fuel filter, which makes the pump work harder and overheat. Replace the fuel filter according to the maintenance schedule in your owner's manual. Keep the fuel system clean by using a quality fuel injector cleaner every few thousand miles.
If you ever have to replace the pump module, take the opportunity to inspect the fuel tank for rust, debris, or water. Clean out any contamination while the tank is open. Use a new sealing ring and lock ring during reassembly to prevent leaks. Torque the lock ring to the factory specification so the module seats properly against the tank.
Recapping the Key Facts
The 2007 Chevy Uplander fuel pump relay is located in the underhood fuse block on the passenger's side of the engine compartment. The relay is labeled R1 on the fuse box diagram and is tied to the 15-amp fuel pump fuse at position 11. Testing the relay takes minutes and can save you from buying a fuel pump you do not need. If the relay and fuse check out, the problem lies in the in-tank pump module, which is a complete assembly that includes the pump, sending unit, and pressure sensor.
When you need a replacement, KEMSO fuel pumps deliver OEM-quality performance with a lifetime warranty, and you can find the right part for your Uplander at https://www.kemsoracing.com/. With a reliable pump and a little routine maintenance, your Uplander can keep running smoothly for many more miles.