Question: I have a 2006 Chevy Silverado with the Z71 Heavy Duty suspension package and I'm confused as to which shocks I should buy for it. I want to get Bilsteins for this truck since that's what it came with but you list two different vehicles, one that says includes Z71 package and the other that says Heavy Duty w/2500 suspension. How do I tell which shocks to buy? I want the Bilstein shocks but both of those vehicles have different ones listed.
Answer: It sounds like you probably have the Z71 package, on the 2006 Chevy Silverado, the Z71 package was an upgraded suspension that included Bilstein shocks and a skid plate from the factory while the Heavy Duty model used the 2500�s suspension. These are completely different things, so if your truck has 1500 Heavy Duty written on the side and back, you have the Heavy Duty package.
One way to tell for sure is to look at the shocks themselves, the Chevy Silverado 1500 shocks look very different from the 2500 (and 1500 HD) shocks. You can see those here:
2005 Chevy Silverado 1500 Z71 4WD Front Shocks 24-065009
2005 Chevy Silverado 1500 Z71 4WD Rear Shocks 24-029056
2005 Chevy Silverado 1500 Heavy Duty 4WD Front Shocks 24-060813
2005 Chevy Silverado 1500 Heavy Duty 4WD Rear Shocks 24-060820
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