Fits 1988-1991 GMC G3500. 1988 GMC G3500 Engine: 7.4L V8; w/o A.C.;. 1989 GMC G3500 Engine: 7.4L V8; w/o A.C.;. 1990 GMC G3500 Engine: 7.4L V8;. 1991 GMC G3500 Engine: 7.4L V8; w/o A.C.;. Part Type: Accessory Drive Belt Idler Pulley.
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