Possible causes
– Faulty fuel pump
– Blocked fuel filter
– Faulty fuel pressure sensor
– Fuel pressure sensor harness is open or shorted
– Fuel pressure sensor electrical circuit poor connection
– Faulty Fuel injector
– Blocked fuel filter
– Faulty fuel pressure sensor
– Fuel pressure sensor harness is open or shorted
– Fuel pressure sensor electrical circuit poor connection
– Faulty Fuel injector
Tech description
There is a factory service bulletin for the P0087 Code. The bulletin suggest for replacing the injectors to repair the problem.
The factory service bulletin affects the following models:
2001-2004 GMC Sierra
2003-2004 GMC Topkick C4500/C5500 Series
When is the obd code mean?
The Engine Control Module (ECM) has determined that the fuel rail pressure is too low for a specific engine RPM
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P0087 GMC OBD Code Description