It's most likely located either:
* On the transmission itself: This is a common location for the TCM, often bolted directly to the side of the transmission case.
* Under the dash: Less common, but possible, especially for some 2WD models.
To find it definitively:
1. Consult your owner's manual: This is your best resource. The manual should have diagrams showing the location of major components.
2. Use a repair manual: A Haynes or Chilton repair manual for your specific year, make, and model Blazer will have detailed diagrams and instructions.
3. Online resources: Search online forums specific to Chevy Blazers (like Blazer forums or enthusiast sites). Search specifically for your year and model, including the 2WD or 4WD designation. Someone else might have already described its location with pictures.
4. Professional mechanic: If you are uncomfortable searching yourself, a mechanic can quickly pinpoint the location.
Important Note: Before attempting to locate or access the TCM, disconnect the negative terminal of your battery to prevent electrical shorts or damage.
