OEM GMC Envoy Fuel Injector

GMC Envoy Fuel Injector Parts and Q&A

• Injector
  12599504
  Q: How to replace the fuel injectors on GMC Envoy?

  A:

  Firstremove the Fuel Rail assembly while disconnecting the Fuel Injector electrical harness connectors from each Fuel Injector before proceeding. First use caution to remove Fuel Injector retainer clips before extracting fuel injectors from the Fuel Rail assembly. Both components need disposal of existing retainer clips along with their o-ring seals which exist on both injector ends. The approach to acquiring new fuel injectors should commence with an identification of the Fuel Injector assembly part number followed by checking its four-digit build date code for proper part selection. Clean engine oil should be used to lubricate new injector o-ring seals before installing them onto Fuel Injector end caps (2, 4). Insert a new retainer clip on the injector before pushing fuel injectors through the Fuel Rail injector socket towards its socket with the electrical connector positioned outward until the clip locks onto a flange on the Fuel Rail socket. After connecting the Fuel Injector electrical harness connectors to the fuel injectors reinstall the Fuel Rail assembly.
• Injector
  19244623
  Q: How to clean the fuel injector on GMC Envoy?

  A:

  The required tools for Fuel Injector cleaning consist of fuel line shut-off adapters (J 37287), Fuel Injector cleaner (J 38500-A), 3/8 fuel line shut-off valve (J 42873-1), 5/16 return pipe shut-off valve (J 42873-2), 3/8 fuel pipe shut-off valve (J 42964-1) and 5/16 fuel pipe shut-off valve (J 42964-2). Use gm top-engine cleaner p/n 12346535 in the us but canadian dealers should use p/n 992872 while respecting a cleaning solution concentration up to 10 percent. Start your procedure by acquiring two tanks containing the Fuel Injector cleaner product designated j 38500-a and verify that the bottom valve of the canister remains sealed. The j 38500-a requires two pre-stacked gm top-engine cleaner containers for us dealers but canadian dealers should measure then fill with 48 ml of top-engine cleaner. The mixture requires 96 ml top-engine cleaner blended with 864 ml regular unleaded gasoline for alternative brand use. Regular unleaded gasoline must be put into the cleaning tank of the tool using all instructions included with the tool. The vehicle Fuel Pump needs disabling and specific shut-off valves should secure the fuel feed and return line where it meets the Fuel Rail. Use the j 38500-a to connect with the vehicle Fuel Rail before applying 510 kpa (75 psi) pressure. The j 38500-a should be unconnected once the engine stops idling before you return the Fuel Pump relay and oil pressure switch connector back into place. After disconnecting the shut-off valves proceed to reconnect the fuel lines and let the vehicle start for 2 more minutes with an idle. Run a second injector balance test to measure fuel pressure drops from all injectors before you change any unit which shows more than 15 kpa (2 psi) decline. One ounce of port Fuel Injector cleaner, gm p/n 12345104 (Canadian P/N 10953467), should be added to the fuel tank for each gallon of gasoline while providing instructions to the customer for fuel brand changes and gm port Fuel Injector cleaner use as maintenance for every 5000 km (3,000 mi). Then conduct a road test to confirm the customer concern is solved.