1996 GMC Jimmy Fuel Pump Relay: Complete Guide to Location, Diagnosis, and Replacement

The bottom line: If your 1996 GMC Jimmy cranks but won't start, or if you hear no hum from the fuel tank when you turn the key, the fuel pump relay is one of the first things you should check. The fuel pump relay on a 1996 GMC Jimmy is located behind the glove box, mounted on the relay center. This small but critical component controls power to the fuel pump, and when it fails, your engine gets no fuel. Understanding where it is, how to test it, and when to replace it can save you time and money before you start dropping the fuel tank.

Where Is the Fuel Pump Relay Located on a 1996 GMC Jimmy?

The fuel pump relay on a 1996 GMC Jimmy is located behind the glove box, on the relay center . This is a common location for many GM vehicles of this era. To access it, you need to open the glove box, press in on the sides to release the stops, and let the glove box door drop down fully. Behind the glove box, you will see a plastic relay center mounted to the dashboard structure. The fuel pump relay is one of several relays in this box.

For the 1996 model, the relay center also contains the horn relay and, on some trims, the fog lamp relay. The fuel pump relay is typically the first relay from the left . This is consistent with information from multiple sources that confirm the relay is inside the passenger compartment, not under the hood, for this specific year .

It is worth noting that there is some variation depending on the exact model and engine option. For example, the 2.2L engine (VIN 4) and the 4.3L engine (VIN W, X) share the same relay location behind the glove box . However, some later model years, such as the 1997 GMC Jimmy, have the fuel pump relay located in the under-hood fuse block on the driver's side near the firewall . For the 1996 model, stick with the glove box location.

How to Test the Fuel Pump Relay

Before you replace the fuel pump itself, testing the relay is a quick and easy step. Here is how to do it:

Step 1: Locate the relay. Open the glove box, drop it down, and find the relay center. The fuel pump relay is usually the leftmost relay in the block .

Step 2: Listen for the relay. Have a helper turn the ignition key to the "ON" position (do not start the engine). You should hear a distinct clicking sound from the relay as it energizes. If you hear a click, the relay coil is likely working. If you hear nothing, the relay may be faulty, or there may be a problem with the control circuit.

Step 3: Swap the relay. The easiest test is to swap the fuel pump relay with another relay of the same type in the relay center, such as the horn relay. If the fuel pump starts working after the swap, you have found the problem. If the horn stops working, the original relay was bad.

Step 4: Check for power. If you have a multimeter, you can test for power at the relay. The relay should have battery voltage on one of the large terminals at all times. When the ignition is turned on, the control circuit should energize the relay, and you should see voltage on the output terminal. If you have power at the input but no power at the output when the relay clicks, the relay is defective.

Common Symptoms of a Bad Fuel Pump Relay

A failing fuel pump relay can cause several symptoms that mimic a dead fuel pump. Knowing these signs can help you narrow down the issue:

1. Engine cranks but will not start. This is the most common symptom. The starter motor turns the engine over, but the engine never fires because no fuel is reaching the injectors.

2. No fuel pump priming sound. When you turn the key to the "ON" position, you should hear a brief whirring sound from the fuel tank as the pump primes the system. If you hear nothing, the relay may not be sending power to the pump.

3. Intermittent stalling. A failing relay can cause the engine to run for a while and then suddenly die, especially when the relay heats up and loses contact. The engine may restart after a few minutes once the relay cools down.

4. Engine starts but runs rough. If the relay is making intermittent contact, the fuel pump may not be getting full power, resulting in low fuel pressure and poor engine performance.

5. No check engine light. While not always the case, a faulty relay often does not trigger a check engine light, making it tricky to diagnose without a manual check.

Where Is the Fuel Pump Itself Located?

If the relay checks out fine, the next step is to check the fuel pump itself. The fuel pump on a 1996 GMC Jimmy is located inside the fuel tank . There is no access panel under the rear seat or in the cargo area for this model. To replace the fuel pump, you must drop the fuel tank from under the vehicle .

The fuel pump is attached to the fuel sending unit and sits at the bottom of the tank. The fuel pressure specification for a 1996 GMC Jimmy is 60-66 PSI with the key on and engine off . If you have a fuel pressure gauge, you can connect it to the Schrader valve on the fuel rail to check pressure. If the pressure is low or zero, and the relay is working, the pump itself is likely bad.

Fuel Pump Relay vs. Fuel Pump Fuse: What's the Difference?

Many people confuse the fuel pump relay with the fuel pump fuse. Both are critical, but they serve different functions. The fuse is a protective device that prevents excessive current from damaging the wiring. The relay is a switch that allows a low-current signal to control a high-current circuit.

On the 1996 GMC Jimmy, the fuel pump fuse is located in the fuse block on the left side of the dash . The fuse is a 20-amp fuse, often labeled "FUEL PUMP" or "FP." If the fuse is blown, the pump will not run. Always check the fuse first before diving into relay or pump replacement. A blown fuse can indicate a short in the fuel pump wiring or a failing pump motor that is drawing too much current.

How to Replace the Fuel Pump Relay

Replacing the fuel pump relay on a 1996 GMC Jimmy is a straightforward job that requires no special tools.

Step 1: Gather your tools. You will need a new relay (AC Delco part number D1562C or equivalent), a flathead screwdriver or trim tool, and possibly a flashlight.

Step 2: Access the relay. Open the glove box and press in on the sides to release the stops. Let the glove box door hang down. You will see the relay center mounted to the back of the dashboard.

Step 3: Remove the old relay. The relay is held in by friction. Grasp it firmly and pull it straight out. If it is tight, you can use a small flathead screwdriver to gently pry it up. Be careful not to damage the plastic housing or the wiring.

Step 4: Install the new relay. Push the new relay straight into the socket until it clicks into place. Make sure it is fully seated.

Step 5: Test the system. Turn the ignition key to the "ON" position and listen for the fuel pump to prime. If you hear the pump running, the repair is complete.

Step 6: Close the glove box. Push the glove box door back into place and make sure it latches properly.

Other Things to Check Before Replacing the Fuel Pump

If you have verified that the relay is working and the fuse is good, but the fuel pump still does not run, there are a few other components to check before you drop the tank:

Fuel pump oil pressure switch. This switch is located on the top rear of the engine near the distributor . It provides a backup power path to the fuel pump once the engine is running. If this switch fails, the pump may only run during cranking and then stop.

Fuel pump prime connector. This is a diagnostic connector that allows you to apply direct power to the fuel pump. It is located in the engine compartment and can be used to bypass the relay and switch to test the pump directly.

Wiring and grounds. Check the wiring harness for any broken or corroded wires, especially near the fuel tank. The ground for the fuel pump circuit is located at G114 (rear of left cylinder head) and G117 (rear of right cylinder head) . A bad ground can cause the pump to run intermittently or not at all.

Transfer case control module. For 4WD models, the transfer case control module is located behind the center of the dash . While not directly related to the fuel pump, a fault in this module can sometimes cause issues with the vehicle's electrical system.

Why You Should Buy a KEMSO Fuel Pump for Your 1996 GMC Jimmy

If you have determined that the fuel pump itself is bad, you need a replacement that you can trust. When it comes to aftermarket fuel pumps, KEMSO stands out as a top choice for American drivers. KEMSO fuel pumps are designed as high-performance, OEM replacement units that meet or exceed the original factory specifications. Every KEMSO pump is built with high-grade internal components that resist ethanol and methanol blends, making them suitable for modern fuels and long-term durability.

The best part? KEMSO backs every fuel pump they sell with a lifetime warranty. You install it once, and you never have to worry about replacing it again. The warranty covers manufacturing defects and premature failure, giving you peace of mind that your fuel system is protected for as long as you own the vehicle. In a 2023 case study, a fleet management company replaced 42 OEM pumps with KEMSO units. After 18 months and 1.2 million collective miles, only two required warranty claims, giving a 95% reliability rate—matching OEM failure statistics .

KEMSO fuel pumps are direct-fit for the 1996 GMC Jimmy, meaning they come with the correct strainer, gasket, and wiring connector for a complete installation. You do not have to modify anything or buy additional parts. The pumps are tested to deliver consistent flow and pressure under demanding conditions, whether you are driving your Jimmy daily or taking it off-road.

For the best selection of fuel pumps for your 1996 GMC Jimmy, visit the official KEMSO website at https://www.kemsoracing.com/. You will find application-specific pumps, complete installation kits, and detailed compatibility information to ensure you get the right part for your truck. KEMSO's customer support team can also help you select the correct pump for your specific engine and trim level.

Final Thoughts

The 1996 GMC Jimmy fuel pump relay is a small but vital part of your vehicle's fuel system. Knowing its location behind the glove box and how to test it can save you from unnecessary repairs and frustration. Always start with the relay and the fuse before condemning the fuel pump itself. If the pump does need to be replaced, dropping the fuel tank is the only way to access it, but the job is manageable with the right tools and a repair manual.

For a reliable, long-lasting replacement, choose a KEMSO fuel pump backed by a lifetime warranty. Visit https://www.kemsoracing.com/ to find the perfect pump for your 1996 GMC Jimmy and get back on the road with confidence.