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GMC 25163468 Fuel Pump

1994-1995 GMC Sonoma

Customer Questions & Expert Answers (11)
GM 25163468 Fuel Pump
  • Part Description
    Pump,Fuel
  • Replaces
    25163470, 25116167, 25163471
  • Manufacturer
    General Motors
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  • Related Parts
  • Product Specifications
  • Vehicle Fitment
  • Customer Questions & Expert Answers
  • Product Specifications

    BrandGenuine GMC
    Manufacturer Part Number25163468
    Part DescriptionPump,Fuel
    Item Dimensions6.9 x 4.5 x 3.4 inches
    Item Weight1.00 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    Replaces25163470, 25116167, 25163471
    ManufacturerGeneral Motors
    SKU25163468
    WarrantyThis genuine GM part is guaranteed by GM's factory warranty.
    Shipping & ReturnShipping Policy Return Policy
    Warning: California's Proposition 65
  • Vehicle Fitment

    Year Make Model Engine Important vehicle option details
    1994-1995 GMC Sonoma4 Cyl 2.2LPICKUP
  • Customer Questions & Expert Answers

    Q:
    I would like to confirm if this is the correct part number for my vehicle. Please advise. Thank you. Posted by GMPartsGiant Specialist
    A:
    You can Select Your Vehicle to check if 25163468 fits your vehicle.
    Posted by GMPartsGiant Specialist
    Q:
    How Should the Fuel Pump and Fuel Pressure Test Be Performed and Diagnosed on Chevrolet Beretta? Posted by Customer
    A:
    For undertaking the fuel pressure test get a fuel pressure gauge coupled with a fuel injection system adapter. Start with a visual inspection performing a rundown check with fuel on the tank, check at the threaded ends of the fuel line for leaks while the engine is running; check for tight connections, flatten or kinks of hoses. Following this, release the fuel system pressure. For models with port fuel injection as required, position the gauge over the Schrader valve of the fuel rail, turn the ignition ON with the Aircon OFF, and take the reading when the fuel pump has its cycle for 2 seconds. The pressure should be maintained constant to the values available within the set range. Switch on the engine for some time and allow it to warm; the pressure should reduce by 3-10 psi. If it does not then add 10 inches vacuum to the pressure regulator and look for pressure drop to know if the regulator needs repair or replacement. If pressure is not within specs consult fuel filter & hoses, pressure regulator, fuel line for leaks & the in-tank fuel pump check valve. Upon completion of the test, turn off the fuel pump and then, switch off the ignition to relieve fuel pressure and then unscrew the gauge. For models with throttle body injection, turn the ignition off for at least twenty seconds, release the fuel pressure, connect a fuel pressure gauge between the fuel hose and the throttle body inlet and use a fused jumper wire when testing the pressure. If the pressure is within the requirements, then no more test is required if not then look for restricted lines or problem with the regulator. After that, it is required to turn off the fuel pump, release fuel pressure, and, finally, take out the gauge. If there are suspicions that there are problems with the fuel pump, check whether you can hear the noise at the moment when the switch is turned On and during the start of the engine. If the pump does not activate, then look at the fuse and the relay of the fuel pump on your car. To test the relay unscrew it while the engine is on; in case the engine continues to run then the oil pressure switch may be a problem. Connect back the relay and touch the terminal for fuel pump with a test light to check the circuit.
    Posted by GMPartsGiant Specialist
    Q:
    What is the function and installation process of the fuel pump on Cadillac Fleetwood? Posted by Customer
    A:
    The fuel pump is a high pressure electric one equipped in the fuel tank, impeller works as the vapor preventer and pre-charges high pressure assembly. Fuel is delivered at positive pressure through an in line fuel filter to the fuel rail assembly, the pressure regulator keeps the pressure required by injectors and any excess fuel is returned to the fuel tank through fuel return line. The electric pump connected in parallel with the PCM and operates whenever the ignition is 'on' and the engine is cranking or running; it turns off immediately the engine cuts or the starter is removed within one second. To remove and install on 4.5L and 4.9L engines, turn off the ignition, disconnect the negative battery terminal, discharge the fuel system, lift the front part of the vehicle and then un bolt the fuel tank, to get access to the pump, turn counter clockwise the cam lock ring to lift the assembly out. To remove it, one has to pull the pump up and at the same time pull it outwards taking care not to break the rubber insulator or the strainer which is always stuck beside it. Installation requires removal of all damaged hoses, forcing the pump into the hoses, employing a brand new O-ring seal, and checking the strainer does not encumber the float arm. For the 4.6L engine, there is integrated fuel sender assembly, which contains fuel pump; it is very difficult to repair due to the use of special tools. Do not fill the tank to the full whenever you want to access the sender with a view of avoiding spilling of fuel. Once you have taken off the fuel rail pressure and has disconnected the battery, then try to find out whether the tank needs to be dropped or whether the access is possible at the rear. If possible, lower the tank, and take off the spare tire lid and rear emblem, unbolt quick connect hoses and electrical plugs, spanner wrench for the ring. Upon removal the sender assembly must be tilted slightly in order to avoid sending the floats out of alignment. Remove the strainer and O-ring and before fitting the new one ensure that the strainer does not hinder the float arm from moving. Reinstalling the battery require checking for any form of leaking during the cycling of the ignition and at the same tightening the access panel bolts. The in-tank pump works when the ignition is on and will remain on during any engine running or cranking, and it will shut down should it fail to detect any reference pulses.
    Posted by GMPartsGiant Specialist
    Q:
    What is the function and installation process of the fuel pump on Cadillac ElDorado? Posted by Customer
    A:
    The fuel pump is a high pressure electric one equipped in the fuel tank, impeller works as the vapor preventer and pre-charges high pressure assembly. Fuel is delivered at positive pressure through an in line fuel filter to the fuel rail assembly, the pressure regulator keeps the pressure required by injectors and any excess fuel is returned to the fuel tank through fuel return line. The electric pump connected in parallel with the PCM and operates whenever the ignition is 'on' and the engine is cranking or running; it turns off immediately the engine cuts or the starter is removed within one second. To remove and install on 4.5L and 4.9L engines, turn off the ignition, disconnect the negative battery terminal, discharge the fuel system, lift the front part of the vehicle and then un bolt the fuel tank, to get access to the pump, turn counter clockwise the cam lock ring to lift the assembly out. To remove it, one has to pull the pump up and at the same time pull it outwards taking care not to break the rubber insulator or the strainer which is always stuck beside it. Installation requires removal of all damaged hoses, forcing the pump into the hoses, employing a brand new O-ring seal, and checking the strainer does not encumber the float arm. For the 4.6L engine, there is integrated fuel sender assembly, which contains fuel pump; it is very difficult to repair due to the use of special tools. Do not fill the tank to the full whenever you want to access the sender with a view of avoiding spilling of fuel. Once you have taken off the fuel rail pressure and has disconnected the battery, then try to find out whether the tank needs to be dropped or whether the access is possible at the rear. If possible, lower the tank, and take off the spare tire lid and rear emblem, unbolt quick connect hoses and electrical plugs, spanner wrench for the ring. Upon removal the sender assembly must be tilted slightly in order to avoid sending the floats out of alignment. Remove the strainer and O-ring and before fitting the new one ensure that the strainer does not hinder the float arm from moving. Reinstalling the battery require checking for any form of leaking during the cycling of the ignition and at the same tightening the access panel bolts. The in-tank pump works when the ignition is on and will remain on during any engine running or cranking, and it will shut down should it fail to detect any reference pulses.
    Posted by GMPartsGiant Specialist
    Q:
    What is the function and testing procedure of the fuel pump on Oldsmobile Cutlass? Posted by Customer
    A:
    The fuel pump is a sealed type actuated by the engine camshaft, utilizing a pushrod between the camshaft and the pump rocker in Chevrolet-manufactured engines. While servicing is not possible due to the sealed nature of the unit, a test can be performed if a fault is suspected. First, ensure there is gas in the fuel tank. Then, disconnect the primary wire running between the coil and the distributor to prevent engine firing when the starter motor is engaged for 1974 models; for 1975 to 1980 models, disconnect the distributor wiring marked 'BAT.' Next, disconnect the fuel inlet pipe from the carburetor and place its open end in a container. Operate the starter motor and observe for well-defined spurts of fuel ejected from the open end of the pipe. If spurts are present, the pump is functioning correctly; if not, replacement of the pump is necessary.
    Posted by GMPartsGiant Specialist
    Q:
    How to check the fuel pump output and pressure on GMC Sonoma? Posted by Customer
    A:
    To check the fuel pump output and pressure, relieve the fuel pressure. Next, Install a fuel pressure gauge on the fuel rail, location varies depending on the system. Turn the ignition switch on without starting the engine and note the reading on the gauge as the fuel pump runs for about two seconds. The pressure should hold steady within the specified range. Start the engine and let it idle at normal operating temperature, with the pressure expected to be lower by 3 to 10 psi. If the pressure does not drop as expected, apply a vacuum to the pressure regulator and if it drops, repair the vacuum source or replace the regulator. If the pressure is not within specifications, check for a vacuum to the regulator or a pinched/clogged fuel return hose. If the pressure is still low, change the fuel filter and if it remains low, install a fuel line shut-off adapter to test the regulator. If the pressure is still low with the return line restricted, there may be a leaking injector or a faulty fuel pump. To check the fuel pump's electrical circuits, verify that the pump runs by listening for a whirring noise when the ignition switch is turned on and when the engine is started.
    Posted by GMPartsGiant Specialist
    Q:
    How to remove and install a fuel pump on Oldsmobile Cutlass? Posted by Customer
    A:
    In order to remove the pump, unbolt the inlet and outlet pipes to the pump by the use of two wrenches in order not to cause damage to the pump and connections. Secondly, remove the fuel pump mounting bolts, the actual pump, as well as the gasket. When replacing the new pump, the new gasket should be used together with conventional gasket sealant around the screw threads. Lastly, join the fuel pipes, switch on the engine and examine if there is any leakage.
    Posted by GMPartsGiant Specialist
    Q:
    How to check Fuel Pump and perform a fuel pressure test on Pontiac Grand Prix? Posted by Customer
    A:
    To conduct a fuel pressure test, you'll need a fuel pressure gauge and appropriate adapter. First, ensure fuel is present and inspect for leaks. Attach the gauge to the fuel rail's Schrader valve, turn on the ignition, and observe the reading. Start the engine and check if the pressure drops by 3-10 psi. If not, apply vacuum to the regulator. If the pressure isn't correct, examine the fuel components. Afterward, release the pressure and remove the gauge. For Throttle Body Injection models, install the gauge between the fuel hose and throttle body. Using a jumper, observe the reading. If the pressure is off, inspect for restrictions or malfunctioning components. Finally, listen for the fuel pump's noise when starting. If it's silent, check the fuse and relay. Apply 12 volts to the pump's terminal to verify functionality. If it's non-operational, inspect the relay and pump circuit.
    Posted by GMPartsGiant Specialist
    Q:
    What should be done before checking the fuel pump output and pressure for the 1995 Chevrolet S10? Posted by Customer
    A:
    Ensure that there is enough fuel in the tank and relieve the fuel pressure.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Fuel Pump
    Q:
    What is the first step to remove the fuel pump/sending unit assembly for the 1994 Chevrolet S10? Posted by Customer
    A:
    The first step is to relieve the fuel system pressure and disconnect the cable from the negative battery terminal.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Fuel Pump
    Q:
    What is the first step to remove the fuel pump/sending unit assembly of the 1994 GMC Sonoma? Posted by Customer
    A:
    The first step is to relieve the fuel system pressure and disconnect the cable from the negative battery terminal.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Fuel Pump
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Genuine GM Part 25163468, the Right Choice

To ensure reliability, purchase GM part # 25163468 Fuel Pump. It is sometimes referred to as GMC Fuel Pump. Directly from GM, genuine parts are superb with regards to quality, longevity, and fit. Every single part passed stringent quality testing, so you can be sure that it's safe, durable, and built to perform like your original parts. This part fits specific GMC Sonoma models.

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