The arrangement of lug nuts on a wheel hub, specifically for the specified vehicle model and year, dictates the compatible wheels that can be safely and securely mounted. This measurement is critical for ensuring proper fitment and preventing potential mechanical failures. It is expressed as a combination of the number of studs or bolts and the diameter of the circle they form (e.g., 6×5.5).
Adherence to the correct specification is essential for maintaining vehicle safety and performance. Employing wheels with an incompatible configuration can lead to vibration, premature wear on components, or, in extreme cases, wheel detachment. Historically, this particular specification has remained consistent for many General Motors trucks within a specific production range, facilitating wheel interchangeability within that range.