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How to Choose the Oil and Fluids for a Geo Tracker

by Contributor

The Tracker has, since its introduction for the 1989 model year, performed a strange shuffle between the Geo and Chevy brands in North American countries. Geo is in fact part of Chevrolet, so no matter what name is on your tracker it remains, essentially, the same vehicle. These steps apply to all model years of the Geo Tracker.

Step 1

Use only engine oil certified for gasoline engines by the American Petroleum Institute--look for their starburst logo on the bottle. SAE 10W-30 oil is suitable if temperatures won't fall below 0 degrees Fahrenheit, but 5W-30 is a better choice. If temperatures will fall below -20 Fahrenheit, consider using a synthetic 5W-30 oil or even 0W-30 for better cold starting.

Step 2

Mix one part of clean drinkable (preferably distilled) water to one part of ethylene glycol base coolant that conforms to GM specification 1825M to keep your Geo Tracker running cool. You can also use approved recycled coolant that conforms to the same specification. The GM part number for this type of coolant is 1052753.

Step 3

Keep your brakes working well with Delco Supreme 11 brake fluid, GM part number 12377967, or an equivalent DOT-3 brake fluid. Using grades other than DOT-3 may result in damage to or failure of your vehicles brakes.

Step 4

Put DEXRON-III automatic transmission fluid in your Geo Tracker power steering system and automatic transmission. The manual transmission requires Synchromesh Transmission Fluid, GM part number 12345349.

Maintain your hydraulic clutch with GM hydraulic clutch fluid, part number 12345347, or an equivalent DOT-3 brake fluid.


  • Many of these recommendations are suitable for the Suzuki Sidekick, which is almost identical to the Geo Tracker.
  • Parking brake cable guides, manual transmission shift linkage, and clutch linkage pivot points can all be maintained with chassis lubricant, GM part number 12377985, or an equivalent that meets the requirements of NLGI #2, Category LB or GC-LB.

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