GMC 2003 Sonoma Owner's Manual page 263

Section 5
Service ............................................................5-3
Doing Your Own Service Work .........................5-3
Adding Equipment to the Outside of Your
Vehicle ......................................................5-4
Fuel ................................................................5-4
Gasoline Octane ............................................5-4
Gasoline Specifications ....................................5-5
California Fuel ...............................................5-5
Additives .......................................................5-6
Fuels in Foreign Countries ...............................5-6
Filling Your Tank ............................................5-7
Filling a Portable Fuel Container .......................5-9
Checking Things Under
the Hood ....................................................5-10
Hood Release ..............................................5-10
Engine Compartment Overview .......................5-12
Engine Oil ...................................................5-15
Engine Air Cleaner/Filter ................................5-20
Automatic Transmission Fluid .........................5-21
Manual Transmission Fluid .............................5-25
Hydraulic Clutch ...........................................5-26
Engine Coolant .............................................5-27
Radiator Pressure Cap ..................................5-30
Engine Overheating .......................................5-30
Cooling System ............................................5-33
Engine Fan Noise .........................................5-40
Service and Appearance Care
Power Steering Fluid .....................................5-41
Windshield Washer Fluid ................................5-42
Brakes ........................................................5-43
Battery ........................................................5-46
Jump Starting ...............................................5-47
Rear Axle .......................................................5-52
Four-Wheel Drive ............................................5-52
Front Axle ......................................................5-53
Bulb Replacement ..........................................5-54
Halogen Bulbs ..............................................5-54
Headlamps ..................................................5-54
One-Piece Front Turn Signal Lamps ................5-57
Two-Piece Front Turn Signal Lamps ................5-57
Center High-Mounted Stoplamp (CHMSL) .........5-58
Taillamps .....................................................5-59
Replacement Bulbs .......................................5-60
Windshield Wiper Blade Replacement ..............5-60
Tires ..............................................................5-62
Inflation -- Tire Pressure ................................5-63
Tire Inspection and Rotation ...........................5-64
When It Is Time for New Tires .......................5-65
Buying New Tires .........................................5-66
Uniform Tire Quality Grading ..........................5-67
Wheel Alignment and Tire Balance ..................5-68
Wheel Replacement ......................................5-68
5-1