Just need to know the engine size to get you exact location
Below are diagrams with locations and highlighted for you:
To test for leaks, a smoke machine is required. For other tests, it would help to know what DTC(diagnostic trouble code) numbers your vehicle has set, as diagnostic troubleshooting procedure can vary greatly.
Locations are shown on previous post for 5.3L . Your information on engine size showed up right after I asked.
As far as testing, to test for leaks a smoke machine is required. for other tests, i would need to know what trouble codes you are getting so that I can provide you with appropriate test procedure
In order to perform the following tests, a you be required to have a test light, a DVOM(digital voltmeter), and most improtantly a Diagnostic Scanner capable of live data feed and command functions(not a code reader). You also need a very good working knowledge of electronics(backprobing at wrong location can fry a component, including the PCM and dramatically increase cost of repair)
All testing information for P0449 is in the previous post. Reposted below: