No way of knowing without a service record and even then it would be a guess.
i have 2004 blazer in ammman Jordan not more than 87 miles per gallon.
16 city and 21 highway.
16-20 mpg depending upon use and driving habits. www.trailvoy.com Trailblazer enthusiasts forum.
118060.5265251
The 1977 Chevy Blazer gets 17 miles per gallon on the highway. This model vehicle gets 13.3 miles per gallon in the city.
Mine has 320,000
i have not found a blazer or jimmy that gets over15 mpg no matter what ya do to it.
190,000 km equates to 118,060.527 miles.
17 to 19 on average.
bout 18-20 MPG
many have lasted over 250,000 miles, the 4.8 is very durable
I have a 1999 with 200,000 miles on it and still running strong.