One problem related to brake drum wheel cylinder has been reported for the 1996 Chevrolet Silverado. The most recently reported issues are listed below.
Whenever a panic stop is required the brakes take almost a second after application before they respond. It is like pushing on an air cylinder with a small orifice - a second is too long to wait for the brakes. The pedal travel is correct and the dealer says it must be normal. I say it is unsafe after narrowly avoiding a crash that should have not even been close if the brake would grab as soon as I step on them. No matter how hard I push there is a time delay while I push "air through the orifice".