The Kelley Blue Book offers values for various vehicles depending on the condition. For the 1999 GMC Sierra 1500 Regular Cab in excellent condition, the value is approximately $4000.
The 2004 GMC Sierra-1500 runs on regular unleaded.
The 2001 GMC Sierra-1500 runs on regular unleaded.
The 2008 GMC Sierra-1500 runs on regular unleaded.
The 2002 GMC Sierra-1500 runs on regular unleaded.
The 2010 GMC Sierra-1500 runs on regular unleaded.
The 2006 GMC Sierra-1500 runs on regular unleaded.
The 2013 GMC Sierra-1500 runs on regular unleaded.
The 2011 GMC Sierra-1500 runs on regular unleaded.
The 2012 GMC Sierra-1500 runs on regular unleaded.
The 2007 GMC Sierra-1500 runs on regular unleaded.
The 2005 GMC Sierra-1500 runs on regular unleaded.
The 2003 GMC Sierra-1500 runs on regular unleaded.