1987 GMC V3500 Engine: 7.4L V8;EngineVIN: W;. 1988 GMC V3500 Engine: 7.4L V8;. 1989 GMC V3500 Engine: 7.4L V8;EngineVIN: W;. Part Type: Accessory Drive Belt Tensioner Pulley. Ensure that this part fits your vehicle by entering your vehicle's Year, Make, Model, Trim, and Engine in the Compatibility Table.