Explanation of Scheduled Services
EXPLANATION OF SCHEDULED SERVICESFor time and/or mileage intervals of scheduled maintenance items, refer to Scheduled Maintenance.
ENGINE OIL QUALITY
Oils of the proper quality for the vehicle can be identified by looking for the STARBURST symbol. The STARBURST symbol indicates that the oil has been certified by the American Petroleum Institute (API), and is preferred for use in gasoline engines.
ENGINE OIL VISCOSITY
The recommended oil viscosity is SAE 5W-30.
NOTICE: Using oils of any viscosity other than those recommended could result in engine damage. When choosing an oil, consider the range of temperatures the vehicle will be operated in before the next oil change. Then, select the recommended oil viscosity.
Engine oil viscosity, or thickness, has an effect on the fuel economy and on the cold-weather operation, such as starting and oil flow. Lower viscosity engine oils can provide better fuel economy and cold-weather performance. However, higher temperature weather conditions require higher viscosity engine oils for satisfactory lubrication. When the temperature is consistently above -18°C (0°F), use SAE 10W-30. SAE 20W-50 or oils of other viscosity rating or quality designations are NOT recommended for use in any trucks at any time.
CHASSIS LUBRICATION
NOTICE: Do not lubricate the parking brake cables. Lubrication destroys the plastic coating on the cable.
Refer to the illustration for the location of the lubrication points for the chassis. Lubricate the following components:
^ The transmission shift linkage
^ The park brake guides
^ The underbody contact points
^ The underbody linkage
Lubrication Fittings 4WD:
(1) Transmission
(2) Rear Axle Differential
(3) Transfer Case
(4) Clutch Actuator
(5) Brake Master Cylinder
(6) Oil Filter
(7) Engine
(8) Front Axle Differential
(9) Front Propeller Shaft
(10) Steering Linkage
Lubrication Fittings RWD:
(1) Propeller Shaft-Slip Joint
(2) Rear Axle Differential
(3) Clutch Actuator
(4) Master Cylinder
(5) Oil Filter
(6) Steering Gear
(7) Engine
(8) Steering Linkage
(9) Transmission
LUBRICATING JOINTS THAT HAVE GREASE FITTINGS
IMPORTANT: Wipe off all dirt from the grease fitting before lubricating the joint. Do not lubricate the ball joints unless the temperature of the ball joints is at least -12°C (+10°F). During cold weather, allow the ball joints to warm up as necessary before being lubricated. Use a low-pressure grease gun on all joints in order to prevent seal damage.
Apply grease slowly while watching the grease seal. Apply the grease until the grease is seen bleeding from the seal. If the seal expands but you do not see any grease, do not apply any more grease. Allow time for the grease to bleed from the seal.
(1) Lubrication Fittings
(1) Lubrication Fittings
Lubricate the steering linkage, the upper ball joint, and the lower ball joint.
TIRE AND WHEEL INSPECTION AND ROTATION
Inspect the tires for abnormal wear or damage. Rotate the tires in order to equalize the wear and obtain maximum tire life.
ACCESSORY DRIVE BELT INSPECTION
Inspect the accessory drive belts for the following conditions:
^ Cracks
^ Fraying
^ Wear
^ Proper tension
Replace the accessory drive belt as needed. Belts can have many small cracks in individual ribs without affecting the performance.
AUTOMATIC TRANSMISSION
Change the fluid and the filter according to the maintenance schedule intervals.
AUTOMATIC TRANSFER CASE
Change the transfer case fluid.
SPARK PLUG WIRE INSPECTION
Clean the spark plug wires. Inspect the spark plug wires for burns, cracks or other damage. Inspect the wire boot fit at the coils and at the spark plugs. Replace the wires as needed.
SPARK PLUG REPLACEMENT
Replace the spark plugs according to the maintenance schedule intervals with the correct type.
FUEL FILTER REPLACEMENT
Replace the fuel filter according to the maintenance schedule intervals with the correct type.
DRIVE AXLE SERVICE
Change the axle fluid according to the maintenance schedule intervals.
COOLING SYSTEM SERVICE
Drain, flush and refill the cooling system with new coolant.