That would be the 4L60E transmission.
Should be a 700R4 Trans.
The 1/2 tons have the 4L60E / 4L65E in them. The 3/4 tons have the 4L80E / 4L85E in them.
That would be the 4L80E transmission.
That would be a 4L60E transmission.
dextron III
dexron 3
The 2009 Chevrolet Silverado-1500 has a 4-speed automatic.
The 2003 Chevrolet Silverado-1500 has a 5-speed manual.
The 2011 Chevrolet Silverado-1500 has a 4-speed automatic.
The 2007 Chevrolet Silverado-1500 has a 4-speed automatic.
The 2001 Chevrolet Silverado-1500 has a 5-speed manual.