Fuel Injector Cleaning: Notes

Special Tools

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
J 42964-2 5/16 Fuel Pipe Shut-Off Valve

CAUTION:

GM Upper Engine and Fuel Injector 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 GM Upper Engine and Fuel Injector Cleaner be added to the vehicle fuel tank, as it may damage the fuel pump and other system components.
Do not exceed the recommended cleaning solution concentration. Higher concentrations may damage fuel system components. Testing has demonstrated that exceeding the recommended cleaning solution concentration does not improve the effectiveness of this procedure.

NOTE: Vehicles with less than 160 km (100 mi) on the odometer should not have the injectors cleaned. These vehicles should have the injectors replaced.