225/75/15 This would depend upon the year of your truck as well.I have a 95 silverado ext cab , 4 x 4 with 16 in. wheels.I believe my size our 235/65/16
The 2014 Chevrolet Silverado-1500 has a V6 engine.
The 2011 Chevrolet Silverado-1500 has a V6 engine.
The 2013 Chevrolet Silverado-1500 has a V6 engine.
The 2007 Chevrolet Silverado-1500 has a V8 engine.
The 2003 Chevrolet Silverado-1500 has a V6 engine.
The 2008 Chevrolet Silverado-1500 has a V6 engine.
The 2006 Chevrolet Silverado-1500 has a V6 engine.
The 2005 Chevrolet Silverado-1500 has a V6 engine.
The 2004 Chevrolet Silverado-1500 has a V6 engine.
The 2002 Chevrolet Silverado-1500 has a V6 engine.
The 2012 Chevrolet Silverado-1500 has a V6 engine.
The 2001 Chevrolet Silverado-1500 has a V6 engine.