other then haynes

i was just wondering is ther anything else other than haynes manual for our cars.i thought i read something about it a long time ago and their was but pretty expensive

http://www.helminc.com/helm/homepage.asp?r=
 
 
You can get the GM service manual from here (same thing the dealer gets). Can be pricey but well worth the money IMO.

I got mine and after shipping it came to $150.  I'd say it is well worth it as it really shows where the bolts are located and can save you a few suprises.