Reading wiring diagrams - noob question

[efair]

I'm looking at the accelerator (APP) wiring diagram on autozone.com. This is my first foray into electrical diagnosis on GM cars so pardon my ignorance... Attached is one diagram I found.

My dumb questions:

- Is there a better source for these diagrams? I.E. something a little more interactive?
- Is there an image showing where the connectors are located?

I'm pretty sure TN, WH/BK, etc, are wire colors... and 0.35 is wire size... and some items refer to connector numbers e.g. C109, C205.

Thanks in Advance!

 

[dbbd1]

What are you wanting to achieve?

 

[efair]

@dbbd1 My current need is to locate all connectors between the ECU and the APP sensor, for inspection and wire fault testing.