P0449ChevroletEVAP Vent Solenoid Control Circuit Malfunction
Usually repairing the problem will allow the computer to clear the code. Use an OBD2 code scanner to read the diagnostic code and get an idea of what to do to repair the engine.
You clear the light with an OBD2 scan tool after the problem that set the light and fault code has been repaired.
PO899 is a code that is not in use at this time and is reserved for the upcoming OBD3.
If you fixed the problem you need a code reader/Scanner and erase them off the PCM with the OBD2 reader/scanner
With an OBD2 scan tool.
You have a problem with an emissions related component. Have the ECU scanned with an OBD2 scan tool to retrieve the code that has been set. A professional can use this code to diagnose the problem.
What do you mean by, "Not Ready"? I do not understand your question.
The 2007 GMC Acadia has 24 valves.
The 2007 GMC Savana has 16 valves.
The 2007 GMC Canyon has 16 valves.
The 2007 GMC Savana has a V8 engine.