According to General Motors, the manual transmission fluid should be checked every 15,000 miles (24,000 km) to make sure the level is full. The manufacturer does not recommend an interval for a manual transmission fluid change, but after 100,000 miles (160,000 km) the fluid should probably be changed.
Dexron® IIE or III automatic transmission fluid is the only type of fluid that can be used on these vehicles. The use of any other fluids or additives may damage the transmission.
See Figure 1
- Carefully raise the car and support on jackstands as close to level as possible.
- Remove the filler plug from the side of the transmission housing. On the 5-speed manual transmission, the filler plug is located on the right side of the transmission. On the 6-speed manual transmission, the filler plug is located on the left side of the transmission assembly.
- If lubricant begins to trickle out of the hole, there is enough and you need not go any further. Otherwise, carefully insert your finger (watch out for sharp threads) and check to see if the oil is up to the edge of the hole.
- If not, add oil through the hole until the level is up to the edge of the hole.
- Install and tighten the filler plug. On 5-speed transmissions, tighten the filler plug to 20 ft. lbs. (27 Nm). On 6-speed transmissions, tighten plug to 22 ft. lbs. (30 Nm).
DRAIN & REFILL
The fluid in the manual transmission does not require changing. If you do choose to change the transmission fluid, the fluid can be drained out through the lower drain plug hole on the side of the transmission. Fill the transmission with the recommended lubricant to the bottom of the filler plug hole and install the filler plug.