2003 Chevrolet Blazer Owner's Manual - Page 284
2003 Chevrolet Blazer Manual
Page 284 highlights
Notice: We recommend you use only fluid labeled D X O @ 111, because fluid with that label is ER N ' made especially for your automatic transmission. Damage caused by fluid other than DEXRON@ 111 is not covered by your new vehicle warranty. How to Check Because this operation can be a little difficult, you may choose to have this done at your GM dealership service department. If you do it yourself, be sure to follow all the instructions here, or you could get a false reading. Notice: Too much or too little fluid can damage your transmission. Too much can mean that some of the fluid could come out and fall on hot engine part or exhaust system parts, starting a fire. Too little fluid could cause the transmission to overheat. Be sure to get an accurate reading if you check your transmission fluid. After adding fluid, recheck the fluid level as described under "How to Check. When the correct fluid level is obtained, push the dipstick back in all the way; then flip the handle down to lock the dipstick in place. Manual Transmission Fluid When to Check A good time to have it checked is when the engine oil is changed. However, the fluid in your manual transmission doesn't require changing. Check the fluid level only when your engine is off, the vehicle is parked on a level place and the transmission is cool enough for you to rest your fingers on the transmission case. 5-2 1