Frame Reference Point Description - Asymmetrical
WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
When 2 corresponding reference points have different measurements, they are called asymmetrical. If you perform a quick cross check and the measurements are unequal, you should check the dimension charts in order to find out if the measuring points are symmetrical or asymmetrical.