I was wrong, male elephant seals can weigh 3000 to 5000 pounds (northern Elephant seals) Southern Elephant seals weigh even more

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Male elephant seals are massive animals and exhibit extreme sexual dimorphism, easily outweighing females by 3 to 6 times. Weights vary heavily depending on the exact species: 

• Southern Elephant Seals: Adult males (bulls) typically weigh between
  
  
  
  to
  
  
  
  pounds (
  
  
  
  to
  
  
  
  kg) and can measure up to
  
  feet in length.
• Northern Elephant Seals: Adult males weigh slightly less, typically ranging from
  
  
  
  to
  
  
  
  pounds (
  
  
  
  to
  
  
  
  kg) and reaching lengths of around
  
  to
  
  feet. 

For an even more localized, real-world comparison, adult bulls in California (which are northern elephant seals) average around the weight of a standard Ford F-150 pickup truck. 

To learn more about their vital statistics or behaviors, visit the Elephant Seal Vital Statistics page from the Elephant Seal Research Center or the NOAA Fisheries Northern Elephant Seal profile.