1995 GMC Yukon Owner's Manual - Page 308

To remove the air cleaner filter on a gasoline engine or a 6.5 liter naturally aspirated diesel engine, turn the wing nuts to the left. Remove the cover and change the filter. To remove the air cleaner filter on a 6.5 liter turbocharged diesel engine, first remove the rubber elbow. Remember to observe the caution about turbocharger blades on the rubber elbow. Then, unhook the cover retaining clips and push the rear of the cover toward the engine. A utomafic Transmission Fluid When to Check and Change A good time to check your automatic transmission fluid level is when the engine oil is changed. Refer t o the Maintenance Schedule to determine when to change your fluid. See "Scheduled Maintenance Services" in the Index. How to Check Because this operation can be a little difficult, you may choose to have this done at your GM dealer Service Department. If you do it yourself, be sure to follow all the instructions here, or you could get a false reading on the dipstick. NOTICE: Too much or too little fluid can damage your transmission. Too much can mean that some the fluid could come out and fall of on hot engine parts or exhaust system parts, starting a fire. sure Be to get an accurate reading if you check your transmission fluid. 6-26