For a 1999 GMC Sierra 1500 with a 5.3L engine, the transmission is typically the 4L60E, not the 4L80E, which is primarily found in heavier-duty trucks. You can find the transmission diagram in the service manual for the vehicle or through online automotive resources and forums. Additionally, websites like Chilton or Haynes may offer detailed diagrams and specifications. If you need a specific diagram, searching for "1999 GMC Sierra 1500 4L60E transmission diagram" online can yield helpful results.
The 2011 GMC Sierra-1500 has a 4-speed automatic.
The 2010 GMC Sierra-1500 has a 4-speed automatic.
The 2003 GMC Sierra-1500 has a 5-speed manual.
The 2007 GMC Sierra-1500 has a 4-speed automatic.
The 2012 GMC Sierra-1500 has a 4-speed automatic.
The 2006 GMC Sierra-1500 has a 5-speed manual.
The 2004 GMC Sierra-1500 has a 5-speed manual.
The 2008 GMC Sierra-1500 has a 4-speed automatic.
The 2001 GMC Sierra-1500 has a 5-speed manual.
The 2009 GMC Sierra-1500 has a 4-speed automatic.
The 2013 GMC Sierra-1500 has a 4-speed automatic.
The 2005 GMC Sierra-1500 has a 5-speed manual.