Vehicle Questions and Answers
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If you own a 2002 Chevy Blazer with an automatic transmission, you should use Dexron III automatic transmission fluid. For those with a manual transmission, SynC-HRomesh transmission fluid is required. If you typically drive under normal conditions, you may only need to change your transmission fluid and filter every 50,000 miles. However, if you often drive in hot city traffic, hilly areas, or tow trailers regularly, it's advisable to change the fluid more frequently. In such cases, it is recommended to change the transmission fluid every 15,000 miles according to the manual.
For a 2002 Chevrolet Blazer, it is recommended to use 20w Dexron III/Mercon 1 transmission fluid.