sentences:  The WhiteGMC Brigadier was produced through the end of the 1989 model year, marking the retirement of the GM H/J chassis after 23 years.For WhiteGMC, the role of the short-hood Class 8 conventional was adopted by the WG series, slotted below the WIL/WCL (replacing the GMC General); all WhiteGMC conventionals were evolutions of the White Road Boss series.For 1990, General Motors redesigned its medium-duty C/K trucks for the first time since 1973, adopting the Chevrolet Kodiak and GMC TopKick branding for the model lines.