2009 Chevrolet Express Van Owner's Manual - Page 261

To inspect or replace the engine air cleaner/filter, do the following: 1. Unhook the retainer clips and remove the cover. 2. Lift the filter out of the engine air cleaner/filter housing. Care should be taken to dislodge as little dirt as possible. 3. Clean the engine air cleaner/filter housing. 4. Inspect or replace the engine air cleaner/filter. Make sure that the filter fits properly into the housing. 5. Reinstall the cover and fasten the retaining clips. Notice: If the air cleaner/filter is off, a backfire can cause a damaging engine fire. And, dirt can easily get into the engine, which will damage it. Always have the air cleaner/filter in place when you are driving. Automatic Transmission Fluid If your vehicle has the DURAMAX Diesel engine, see the DURAMAX Diesel manual for more information. When to Check and Change Automatic Transmission Fluid A good time to check your automatic transmission fluid level is when the engine oil is changed. Change the fluid and filter at the intervals listed in Additional Required Services on page 6-7, and be sure to use the transmission fluid listed in Recommended Fluids and Lubricants on page 6-15. { CAUTION: Operating the engine with the air cleaner/filter off can cause you or others to be burned. The air cleaner not only cleans the air; it helps to stop flames if the engine backfires. If it is not there and the engine backfires, you could be burned. Do not drive with it off, and be careful working on the engine with the air cleaner/filter off. 5-21