Around 2 tons
Depends on what Buick Model and year you are referring to.
I think the last year for Skylark was 1998, but they weigh around 2500 pounds.
As of April 2013, there have been eighteen separate Buick models produced by Buick / General Motors. A few examples of Buick models include the Buick Skyhawk, Buick Regal, and the Buick Roadmaster.
Two
The 2013 Buick Enclave has 24 valves.
The 2011 Buick Regal has 16 valves.
The 2012 Buick Regal has 16 valves.
The 2014 Buick LaCrosse has 16 valves.
The 2001 Buick Regal has 12 valves.
The 2013 Buick Encore has 16 valves.
The 2014 Buick Enclave has 24 valves.
The 2013 Buick Regal has 16 valves.