Signature Series For GMC ~ Sonoma - S-15 ~ 1982-2006 ~ Black ~ (Extended Cab 2DR & 3DR) Westins patent pending step pad mounting method permanently attaches the step pad to a recessed area rather than a cut-out hole, for added strength and step pad longevity 3in diameter steel tube with UV resistant molded polymer step pad will not fade or crack under harsh conditions Customized mounting brackets for each application ensures perfect fit Choose a highly polished chrome or tough black powdercoat finish, protected by an exclusive 5-year warranty Bolt-On Installation -No Drilling Required