1969 GMC C25/C2500 Suburban Engine: 5.7L V8; w/o A.C.; Position: Fan and Alternator;. 1969 GMC C25/C2500 Suburban Engine: 5L V6; w/o A.C.; Position: Fan and Alternator;. 1969 GMC C25/C2500 Suburban Engine: 5L V8; w/o A.C.; Position: Fan and Alternator;.