2005 Bonneville GXP, CEL is on and code is intake emission leak. How can I find where leak coming from?

The engine is V-8, 4.6L Northstar 275HP

Oh, Northstar..tenisshoes, you want to tell him?

Tshoes may be gone...Did you get P0701 or P0704? The Northstar is notorious for intake manifold problems, check out: http://www.carsurvey.org/reviews/pontiac/bonneville/2005/ Now your question, finding the leak? Look, more like inspect, all vacuum hoses, listen closely and maybe you can even hear it it idle, and there are products in aerosol cans, a dye that you can use very short squirts at it. It's "atomized" to a fine mist but visible to see where it may be sucking in. It works pretty good actually

LEAK DETECTION METHODS AND DEFINING THE SIZES OF LEAKS FROM http://www.ndt.net/article/v04n02/slov_30/slov_30.htm Or this is real good, better yet: http://www.popularmechanics.com/cars/how-to/maintenance/how-to-find-a-vacuum-leak