for the most part 99% of the time the only relay for that year truck is a pressure switch on the low pressure line if this isn't the issue the relay for the ac. fan is on the rad. support or on the fire wall
The 2011 Chevrolet Silverado-1500 has 12 valves.
The 2009 Chevrolet Silverado-1500 has 12 valves.
The 2003 Chevrolet Silverado-1500 has 12 valves.
The 2012 Chevrolet Silverado-1500 has 12 valves.
The 2006 Chevrolet Silverado-1500 has 12 valves.
The 2004 Chevrolet Silverado-1500 has 12 valves.
The 2003 Chevrolet Silverado-1500 has a V6 engine.
The 2001 Chevrolet Silverado-1500 has 12 valves.
The 2014 Chevrolet Silverado-1500 has a V6 engine.
The 2013 Chevrolet Silverado-1500 has a V6 engine.
The 2008 Chevrolet Silverado-1500 has 12 valves.
The 2008 Chevrolet Silverado-1500 has a V6 engine.