1981 Peace be upon you For sale: GMC Sierra, model 1981 Classic GMC in good condition and ready. Specifications: Original 350 engine Manual transmission GM chassis (converted Chevrolet), inspected and renewed No 4WD Air conditioning is working and cold The car is clean and worth it. Price is negotiable (open to offers). Contact via the website only. Please do not call. Serious buyers, please contact. May God grant us all the best.