i just finished reading information on the 10 cheapest rides to insure. although neither the z nor the blazer were included, the article went on to explain why rates vary so greatly. i was surprised that an insurance premium isn’t necessarily based on the price of the vehicle itself, but moreso on the demographic it tends to attract.
for example, a camaro is likely to attract a young male audience, which has a stronger propensity for incident than the z, which (partially due to its price) is likely to attract males who are in their late twenties or beyond; a demographic much more likely to drive responsibly. so when the insurance on my brand new z was slightly less than a 3 year old cougar, now i have more of an idea why.