OBD-II Diagnostic Trouble Code
P0455
Evaporative Emission System Leak Detected Large Leak
P
Powertrain
engine / trans
engine / trans
0
Generic
SAE standard
SAE standard
4
Auxiliary emission controls
55
Evaporative Emission System Leak Detected Large Leak
Severity · general guide
Moderate
Fix soon — usually won't strand you
Code type
GMC
System
Powertrain
Model
Sierra 1500
Years
2007-2019