What is the size of 2 threaded holes in a 2002 Chevy Tracker brake drum?

There isn't a standardized size for threaded holes in Chevy Tracker brake drums. The size will vary depending on the specific model year (even within 2002), engine size, and whether it's a front or rear drum.

To find the correct size, you need to:

1. Locate your specific vehicle's specifications: Your owner's manual might list the brake drum specifications, including the threaded hole sizes.

2. Check a parts catalog: Use the vehicle's VIN number with an online parts catalog (like AutoZone, Advance Auto Parts, or RockAuto) to find the correct brake drum for your specific Tracker. The catalog will show the dimensions, including the threaded holes.

3. Measure the existing holes: If you have access to the brake drum, carefully measure the diameter and thread pitch of the holes using appropriate tools (e.g., calipers, thread pitch gauge). Be cautious, as the surfaces can be sharp.

Without more specific information about your 2002 Chevy Tracker, it's impossible to give you the correct answer.