H16 or 9009. Putco produces aftermarket bulb found at Summit Racing
The 2008 Chevrolet Silverado-1500 has a 4.3 L base engine size.
The 2008 Chevrolet Silverado-2500HD has a 6.0 L base engine size.
The 2008 Chevrolet Silverado-3500HD has a 6.0 L base engine size.
The 2008 Chevrolet Silverado-1500 has a V6 engine.
The 2008 Chevrolet Silverado-3500HD has a V8 engine.
The 2008 Chevrolet Silverado-2500HD has a V8 engine.
1 inch
There is a sticker inside of the drivers door jam that will tell you that infomation.
6 1/2" on front and back doors.
front and rear door speakers are 6 1/2"....
9145 or H10. both are the same size.
v8's are 4.7, 5.3, and 6.0 not sure about v6's....