For 1977-1978 GMC G25 Radiator Cap API 33323DJ Radiator Cap -- Standard; 16 lb

API 23TT59G Radiator Cap Fits 1977-1978 GMC K35 Radiator Cap -- Standard; 16 lb

API 63QX56P Radiator Cap Fits 1977-1978 GMC G35 Radiator Cap -- Standard; 16 lb

For 2011-2016 GMC Acadia Radiator Cap API 29949JJBJ 2013 2012 2014 2015 3.6L V6

API 85MY39Z Radiator Cap Fits 1977-1978 GMC P35 Radiator Cap -- Standard; 16 lb

API 19MX84J Radiator Cap Fits 1977-1978 GMC P25 Radiator Cap -- Standard; 16 lb

For 1977-1978 GMC P35 Radiator Cap API 83822XB Radiator Cap -- Standard; 16 lb

For 1977-1978 GMC G35 Radiator Cap API 51583HF Radiator Cap -- Standard; 16 lb