2004 GMC SIERRA fuel pressure

(b)Visually inspect front and rear suspension and
steering system for damaged, loose or missing parts,
signs of wear or lack of lubrication. Inspect power
steering lines and hoses for proper hook-up, binding,
leaks, cracks, cha®ng, etc. Visually check constant
velocity joints, rubber boots and axle seals for leaks.
(c)Visually inspect hoses and have them replaced if they
are cracked, swollen or deteriorated. Inspect all pipes,
®ttings and clamps; replace with genuine GM parts as
needed. To help ensure proper operation, a pressure test
of the cooling system and pressure cap and cleaning the
outside of the radiator and air conditioning condenser is
recommended at least once a year.
(d)Visually inspect wiper blades for wear or cracking.
Replace blade inserts that appear worn or damaged
or that streak or miss areas of the windshield.
(e)Make sure the safety belt reminder light and all your
belts, buckles, latch plates, retractors and anchorages
are working properly. Look for any other loose or
damaged safety belt system parts. If you see anything
that might keep a safety belt system from doing its
job, have it repaired. Have any torn or frayed safety belts
replaced. Also look for any opened or broken air bag
coverings, and have them repaired or replaced. (The air
bag system does not need regular maintenance.)
(f)Lubricate all key lock cylinders, body door hinges,
hood latch assembly, secondary latch, pivots, spring
anchor, release pawl, tailgate hinges, tailgatelinkage,
tailgate handle pivot points, latch bolt, fuel door
hinge, locks and folding seat hardware. More frequent
lubrication may be required when exposed to a corrosive
environment. Applying silicone grease on weatherstrips
with a clean cloth will make them last longer, seal
better and not stick or squeak.
(g)Add ¯uid as needed. A ¯uid loss could indicate a
problem; repair as needed. Check vent hose at transfer
case for kinks and proper installation.
(h)Change automatic transmission ¯uid and ®lter if the
vehicle GVWR is over 8600 lbs. or if the vehicle is
mainly driven under one or more of these conditions:
þIn heavy city traffic where the outside temperature
regularly reaches 90ÉF (32ÉC) or higher.
þIn hilly or mountainous terrain.
þWhen doing frequent trailer towing.
þUses such as found in taxi, police or delivery
service.
(i)Drain, ¯ush and re®ll cooling system. See Engine
Coolant on page 5-33for what to use. Inspect hoses.
Clean radiator, condenser, pressure cap and ®ller neck.
Pressure test the cooling system and pressure cap.
6-9

At the First 100, 1,000 and 6,000
Miles (160, 1 600 and 10 000km)
Check dual wheel nut torque. For proper torque, seeCapacities and Speci®cations on page 5-134.
At Each Fuel Fill
It is important to perform these underhood checks at
each fuel ®ll.
Engine Oil Level Check
Check the engine oil level and add the proper oil if
necessary. SeeEngine Oil on page 5-18for further
details.
Notice:It is important to check your oil regularly
and keep it at the proper level. Failure to keep your
engine oil at the proper level can cause damage
to your engine not covered by your warranty.
Engine Coolant Level Check
Check the engine coolant level and add
DEX-COOLžcoolant mixture if necessary. SeeEngine
Coolant on page 5-33for further details.
Windshield Washer Fluid Level Check
Check the windshield washer ¯uid level in the windshield
washer tank and add the proper ¯uid if necessary.
At Least Once a Month
Tire In¯ation Check
Visually inspect your tires and make sure tires are
in¯ated to the correct pressures. Do not forget to check
your spare tire. See
Tires on page 5-76for further
details. Check to make sure the spare tire is stored
securely. Push, pull and then try to rotate or turn
the spare tire. If it moves, tighten it. See
Changing a
Flat Tire on page 5-96.
6-11

Fluid (cont.)
Windshield Washer......................................5-46
FM Stereo....................................................3-129
Fog Lamps....................................................3-17
Folding the Rear Seat....................................... 1-9
Following Distance..........................................4-92
Four-Wheel Drive....................................2-35, 5-60
Four-Wheel-Drive Light....................................3-53
Front Axle......................................................5-61
Front Axle Locking Feature...............................2-35
Front Reading Lamps......................................3-19
Front Storage Area.........................................2-67
Fuel............................................................... 5-4
Additives...................................................... 5-6
California Fuel.............................................. 5-5
Filling a Portable Fuel Container..................... 5-9
Filling Your Tank........................................... 5-7
Fuels in Foreign Countries.............................. 5-6
Gage.........................................................3-54
Gasoline Octane........................................... 5-4
Gasoline Speci®cations.................................. 5-5
Low Warning Light.......................................3-54
Fuel Information Button....................................3-58
FUEL LEVEL LOW.........................................3-68
Fuses
Fuses and Circuit Breakers.........................5-126
Windshield Wiper.......................................5-126G
Gage
Engine Coolant Temperature.........................3-46
Fuel..........................................................3-54
Oil Pressure...............................................3-52
Speedometer..............................................3-35
Tachometer.................................................3-35
Transmission Temperature.............................3-47
Voltmeter Gage...........................................3-42
Gasoline
Octane........................................................ 5-4
Speci®cations............................................... 5-5
Getting Familiar with Off-Road Driving................4-24
Glove Box.....................................................2-66
GM Mobility Program for Persons with
Disabilities.................................................... 7-5
H
Hazard Warning Flashers................................... 3-6
Head Restraints............................................... 1-8
Headlamp High/Low-Beam Changer.................... 3-9
Headlamps....................................................5-64
Bulb Replacement.......................................5-64
7

Single Stage Air Bags.....................................1-74
Single Stage vs. Dual Stage Air Bags................1-73
Six-Speed (VORTECŸ 8100 V8 and
DURAMAXŸ 6600 V8 Engines)...................2-32
Skidding........................................................4-19
Snow Plow....................................................4-64
Some Other Rainy Weather Tips.......................4-41
Spare Tire....................................................5-116
Special Fabric Cleaning Problems....................5-118
Speci®cations, Capacities...............................5-134
Speedometer..................................................3-35
Stalling on an Incline.......................................4-34
Starting Your Engine.......................................2-23
Starting Your V8 Engine..................................2-24
Steering........................................................4-12
Steering in Emergencies..................................4-13
Steering Tips..................................................4-12
Steering Wheel Controls, Audio.......................3-128
Step-Bumper Pad..........................................4-103
Stereo RCA Jacks.........................................3-122
Storage Areas................................................2-66
Center Console Storage Area........................2-67
Cupholder(s)...............................................2-66
Front Storage Area......................................2-67
Glove Box..................................................2-66
Storing a Flat or Spare Tire, Jack and Tools.....5-109
Stuck in Sand, Mud, Ice or Snow......................4-51
Sun Visors.....................................................2-18
Swing-Out Windows........................................2-18T
Tachometer....................................................3-35
Tailgate.........................................................2-14
Tailgate Removal............................................2-14
Taillamps.......................................................5-71
Taillamps (Chassis Cab Models)........................5-73
Temperature and Compass Display....................2-55
Temperature Display........................................2-58
Testing the Alarm............................................2-20
Theft-Deterrent, Radio....................................3-127
Theft-Deterrent Systems...................................2-19
Content Theft-Deterrent................................2-19
Passlock
ž...................................................2-21
TIGHTEN FUEL CAP......................................3-72
Tilt Wheel........................................................ 3-7
Tire Sidewall Labeling......................................5-76
Tire Size.......................................................5-80
Tire Terminology and De®nitions........................5-81
Tires.............................................................5-76
Buying New Tires........................................5-89
Chains.......................................................5-94
Changing a Flat Tire....................................5-96
Dual Tire Operation.....................................5-85
If a Tire Goes Flat.......................................5-95
In¯ation - Tire Pressure................................5-84
Inspection and Rotation................................5-86
Spare Tire................................................5-116
Uniform Tire Quality Grading.........................5-90
15