Rainier AWD L6-4.2L (2007)
Fuel Injector: Procedures
Fuel Injector Cleaning
Tools Required
* J37287 Fuel Line Shut-Off Adapters
* J35800-A Fuel Injector Cleaner
* J42873-1 3/8 Fuel Line Shut-Off Valve
* J42873-2 5/16 Return Pipe Shut-Off Valve
* J42964-1 3/8 Fuel Pipe Shut-Off Valve
* J42964-2 5/16 Fuel Pipe Shut-Off Valve
Notice:
* GM Top-Engine Cleaner is the only injector cleaning agent recommended. Do not use other cleaning agents, as they may contain methanol which
can damage fuel system components.
* Under NO circumstances should the top engine cleaner be added to the vehicles fuel tank, as it may damage the fuel pump and other system
components.
* Do not exceed a 10 percent cleaning solution concentration. Higher concentrations may damage fuel system components. Testing has
demonstrated that exceeding the 10 percent cleaning solution concentration does not improve the effectiveness of this procedure.
Important: Vehicles with less than 160 km (100 mi) on the odometer should not have the injectors cleaned. These vehicles should have the
injectors replaced.
Important: During this procedure you will need a total of 960 ml (32.4 oz) of cleaning solution. That is 2 tanks of solution for the J35800-A.
Other brands of tools may have a different capacity and would therefore require more or less tanks to complete the procedure. You must use
all 960 ml (32.4 oz) of solution to ensure complete injector cleaning.
1. Obtain J35800-A (2).
Important: Make sure the valve at the bottom of the canister (3) is closed.
2. For US dealers, empty 2 pre-measured GM Top-Engine Cleaner containers, 24 ml (0.812 oz) each, GM P/N 12346535, into the J35800-A.
3. For Canadian dealers, measure and dispense 48 ml (1.62 oz) of Top-Engine Cleaner, Canadian P/N 992872, into the J35800-A.
4. If you are using any other brand of tank you will need a total of 96 ml (3.24 oz) of Top-Engine Cleaner mixed with 864 ml (29.16 oz) of regular
unleaded gasoline.
5. Fill the injector cleaning tank with regular unleaded gasoline. Be sure to follow all additional instructions provided with the tool.
6. Electrically disable the vehicle fuel pump by removing the fuel pump relay and disconnecting the oil pressure switch connector, if equipped.
7. Disconnect the fuel feed and return line, if equipped, at the fuel rail. Plug the fuel feed and return line, if equipped, coming off the fuel rail with
J37287 , or J42964-1 , and J42964-2 or J42873-1 , and J42873-2 as appropriate for the fuel system.
8. Connect the J35800-A to the vehicle fuel rail.
9. Pressurize the J35800-A to 510 kPa (75 psi).
10. Start and idle the engine until it stalls due to lack of fuel. This should take approximately 15-20 minutes.
11. Disconnect J35800-A from the fuel rail.
12. Reconnect the vehicle fuel pump relay and oil pressure switch connector, if equipped.
