Should have the injector cleaned for sure
but the service should be to isolate and clean the injectors and not just add some cleaner to the tank, as you can do that your self
special top cylinder and fuel injector cleaner should be used
as recommended by the factory
also check this if it apply to you
General Motors Engineering, in an effort to determine the root cause of catalytic converter damage, has determined that aftermarket alarm systems incorrectly installed in vehicles have the potential to cause misfire codes and damage to the converter. These alarm systems use a circuit interrupt which utilizes the ignition circuit on the vehicles.
These alarm systems utilize mechanical relays and normal vehicle movement can trigger these relays to engage and disengage the ignition circuit while the vehicle is in motion. These disruptions of the ignition circuit, which occur in milliseconds, may cause more fuel to be commanded. Over time, this dumping of fuel on and off again can cause misfire codes and ultimately damage the converter assembly.
Thursday, March 11th, 2010 AT 6:18 AM