Is the cap yellow with a hand wave on where you check the trans fluid on my g8. And is it fairly to the front of the engine
There isn't one. The yellow is the engine oil. Check out this article. http://www.edmunds.com/pontiac/g8/2008/long-term-road-test/2008- pontiac-g8-gt-dipstick-what-dipstick.html
Search Pontiac G8 Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Pontiac G8 Experts