1999 Tahoe Wheel Spacers

Has anyone one out there put a set of wheel spacers on their 4WD Tahoe (mine's a 1999 2 door) and if so what brand and how thick were the spacers? Also did you have any tire rubbing or vibration problems? I'm looking to keep the stock 16" rims and get something to move them out from the hubs so they fill up the wheel well better and make the truck have a wider stance. Thanks for the feed back.