OEM Chevrolet Silverado 3500 Fuel Injector

Chevrolet Silverado 3500 Fuel Injector Parts and Q&A

• Injector
  12574927
  Q: How to replace the fuel injector on Chevrolet Silverado 3500?

  A:

  You must disconnect the Fuel Rail and proceed with cautiously extracting the Fuel Injector retainer clip along with the Fuel Injector . You need to remove the Fuel Injector retainer clip followed by the Fuel Injector O-Ring seals which are identified as 2 and 4. Check that you purchase the specific Fuel Injector made for your application because its identification part number along with its four-digit build date code reveals the month and day and year and production shift. You should apply clean engine oil to the new injector o-ring seals (2, 4) before installing them onto the Fuel Injector. The Fuel Injector assembly happens by inserting the Fuel Injector into the Fuel Rail injector socket while the electrical connector faces outward and the new retainer clip attaches onto the flange of the Fuel Rail injector socket. Finally, reinstall the Fuel Rail.
• Injector
  12580426
  Q: How to clean fuel injectors effectively on Chevrolet Silverado 3500?

  A:

  There are several components needed for Fuel Injector cleaning including j 37287 (Fuel Line Shut-Off Adapters), j 35800-a (Fuel Injector Cleaner), j 42873-1 (3/8 Fuel Line Shut-Off Valve), j 42873-2 (5/16 Return Pipe Shut-Off Valve), j 42964-1 (3/8 Fuel Pipe Shut-Off Valve), and j 42964-2 (5/16 Fuel Pipe Shut-Off Valve). The recommended gm top-engine cleaner must be your only choice since using other agents with methanol or injecting the cleaner into the fuel tank can damage the Fuel Pump. A 10 percent solution concentration should be followed for the cleaning mixture since higher concentrations might damage the fuel system components. When a vehicle accumulates less than 160 km (100 mi) of odometer reading the injectors should be replaced rather than undergoing cleaning. The required amount of cleaning solution reaches 960 ml (32.4 oz) and corresponds to filling up two tanks in the j 35800-a. Us dealers should add two 24 ml (0.812 oz) gm top-engine cleaner cans with gm p/n 12346535 into the j 35800-a. Close the bottom valve while performing this step. The j 35800-a needs canadian dealers to set the top-engine cleaner (Canadian P/N 992872) at 48 ml (1.62 oz). The combination of 96 ml (3.24 oz) top-engine cleaner solution requires 864 ml (29.16 oz) regular unleaded gasoline in any non-gm brand. The cleaning tank of the injector tool requires regular unleaded gasoline according to manufacturer instructions. To disable the Fuel Pump start by removing the Fuel Pump relay and then disconnect the oil pressure switch connector when present. The j 37287, j 42964-1, j 42964-2, j 42873-1, and j 42873-2 should be used to plug the fuel feed and return line at the Fuel Rail based on applicability. The technician must attach the j 35800-a to the vehicle Fuel Rail before increasing its pressure to 510 kpa (75 psi). Proceed with starting the engine at idle until it cuts off because of fuel depletion takes approximately 15-20 minutes. After disconnecting the j 35800-a from the Fuel Rail the technician should reinstall both the Fuel Pump relay and oil pressure switch connector followed by removing the plugging items to reconnect the fuel feed and return lines. Allow the vehicle to start and idle for another two minutes to clear away remaining injector cleaner that still remains in the Fuel Rail and lines. Execute the repeated procedures of steps 1 through 5 during the injector balance test while documenting the pressure drops observed in each device. The replacement of the injector with the lowest drop becomes necessary only when the difference between highest and lowest fuel pressure drop exceeds 15 kpa (2 psi). The service technician should introduce one ounce of port Fuel Injector cleaner that corresponds to the gasoline amount (GM P/N 12345104 or Canadian P/N 10953467) into the fuel tank but request the customer to complete the bottle consumption before the next fuel refill. The customer needs to switch to a different fuel brand while using gm port Fuel Injector cleaner at every 5000 km (3,000 mi) interval to sustain injector cleanliness and prevent recurring cleaning operations. Drive the vehicle on the road to ensure the customer concern has been successfully addressed.