2009 Chevrolet Silverado 2500 HD Extended Cab Owner's Manual - Page 553

(n) Vehicles with diesel engine or with GVWR above 10,000 lbs (4 536 kg) only: Inspect shields for damage or looseness. Adjust or replace as required. This is a Noise Emission Control Service. Applicable to vehicles sold in the United States and recommended for vehicles sold in Canada. (p) If driving regularly under dusty conditions, inspect the filter or change indicator (if equipped) at each engine oil change. (q) Visually inspect belt for fraying, excessive cracks, or obvious damage. Replace belt if necessary. At the First 100, 1,000 and 6,000 Miles (160, 1 600 and 10 000 km) For vehicles with dual wheels, check dual wheel nut torque. For proper torque, see Capacities and Specifications on page 5-129. At Each Fuel Fill It is important to perform these underhood checks at each fuel fill. Owner Checks and Services These owner checks and services should be performed at the intervals specified to help ensure vehicle safety, dependability, and emission control performance. Your dealer/retailer can assist with these checks and services. Be sure any necessary repairs are completed at once. Whenever any fluids or lubricants are added to the vehicle, make sure they are the proper ones, as shown in Recommended Fluids and Lubricants on page 6-15. Engine Oil Level Check Notice: It is important to check the engine oil regularly and keep it at the proper level. Failure to keep the engine oil at the proper level can cause damage to the engine not covered by the vehicle warranty. Check the engine oil level and add the proper oil if necessary. See Engine Oil on page 5-15. Engine Coolant Level Check Check the engine coolant level and add DEX-COOL® coolant mixture if necessary. See Engine Coolant on page 5-29. 6-11