2003 CHEVROLET TAHOE engine

Underhood Fuse BlockThe underhood fuse block in the engine compartment
on the driver's side of the vehicle near the battery.
Lift the cover for access to the fuse/relay block.
To remove fuses, hold the end of the fuse between your
thumb and index ®nger and pull straight out.
See
Engine Compartment Overview on page 5-14for
more information on its location.
5-113

*1Ð Gasoline Engine and Fuel Injection Rail #2.
*2Ð Gasoline Engine and Fuel Injection Rail #1.
*3Ð Gasoline Engine; Oxygen Sensors.
*4Ð Gasoline Engine; Oxygen Sensors.
*5Ð PCM Ignition
Fuses Usage
GLOW PLUG Not Used
CUST FEED Gasoline Accessory Power
STUD #1Auxiliary Power (Single
Battery and Diesels
Only)/Dual Battery (TP2) Do
not install fuse.
MBECMid Bussed Electrical Center
Power Feed, Front Seats,
Right Doors
BLOWER Front Climate Control Fan
LBECLeft Bussed Electrical Center,
Door Modules, Door Locks,
Auxiliary Power OutletÐRear
Cargo Area and Instrument
Panel
Fuses Usage
STUD 2Accessory Power/Trailer
Wiring Brake Feed
ABS Anti-Lock Brakes
VSES/ECAS Vehicle Stability
IGN A Ignition Power
IGN B Ignition Power
LBEC 1Left Bussed Electrical Center,
Left Doors, Truck Body
Controller, Flasher Module
TRL PARK Parking Lamps Trailer Wiring
RR PARKRight Rear Parking and
Sidemarker Lamps
LR PARKLeft Rear Parking and
Sidemarker Lamps
PARK LP Parking Lamps Relay
STARTER Starter Relay
INTPARK Interior Lamps
STOP LP Stoplamps
TBC BATTTruck Body Controller
Battery Feed
5-115

Capacities and Speci®cations
Please refer toPart D: Recommended Fluids and Lubricants on page 6-18for more information. All capacities are
approximate.
Capacities and Speci®cations
Engine Type VIN Code Spark Plug Gap
VORTECŸ 4800 V8 V8 V 0.060 inches (1.52 mm)
VORTECŸ 5300 V8 V8 T 0.060 inches (1.52 mm)
VORTECŸ 5300 V8 V8 Z 0.060 inches (1.52 mm)
VORTECŸ 6000 V8 V8 U 0.060 inches (1.52 mm)
VORTECŸ 8100 V8 V8 G 0.060 inches (1.52 mm)
Wheels and Tires
Model Description Torque
C/K 1500 6 bolts (14 mm) 140 lb ft (190Y)
C/K 2500 8 bolts (14 mm) 140 lb ft (190Y)
Tire PressureSee the Certi®cation/Tire label on the rear edge of the driver's door or the
incomplete vehicle document in the cab.
5-118

After re®ll, the level must be rechecked. SeeCooling System on page 5-36.
Cooling System Capacity
ApplicationCapacities
English Metric
Cooling System
VORTECŸ 4800 V8 Automatic with front A/C 14.4 quarts 13.6 L
VORTECŸ 4800 V8 Automatic with front and rear A/C 15.8 quarts 15.0 L
VORTECŸ 5300 V8 Automatic with front A/C 14.4 quarts 13.6 L
VORTECŸ 5300 V8* Automatic with front and rear A/C 15.8 quarts 15.0 L
VORTECŸ 6000 V8 Automatic 15.8 quarts 15.0 L
VORTECŸ 6000 V8** Automatic with engine oil cooler 15.4 quarts 14.6 L
VORTECŸ 8100 V8 Automatic 20.7 quarts 19.6 L
*Vehicles equipped with the optional air conditioner.
**Vehicles equipped with the optional engine oil cooler.
Add one liter if equipped with rear heating for all engines.
After re®ll, the level must be rechecked. Add enough engine oil so that the ¯uid is within the proper operating range.
See
Engine Oil on page 5-18.
5-119

Capacities
ApplicationCapacities
English Metric
Engine Oil with Filter
VORTECŸ 4800 V8 VIN V 6.0 quarts² 5.7 L²
VORTECŸ 5300 V8 VIN T 6.0 quarts² 5.7 L²
VORTECŸ 5300 V8 VIN Z (E-85) 6.0 quarts² 5.7 L²
VORTECŸ 6000 V8 VIN U 6.0 quarts² 5.7 L²
VORTECŸ 8100 V8 VIN G 6.5 quarts² 6.1 L²
Fuel Tank Capacity
Tahoe/Yukon 26.0 gallons 98.4 L
Suburban/Yukon XL (1500 Series) 31.0 gallons 117.3 L
Suburban/Yukon XL (2500 Series) 37.5 gallons 140.0 L
Air Conditioning Refrigerant Capacity
Tahoe/Yukon 2.71 lbs. 1.23 kg
Suburban/Yukon XL 3.0 lbs. 1.36 kg
²Oil ®lter should be changed at every oil change.
5-120

Normal Maintenance Replacement Parts
Replacement part numbers listed in this section are based on the latest information available at the time of printing,
and are subject to change. If a part listed in this manual is not the same as the part used in your vehicle when it
was built, or if you have any questions, please contact your GM dealer.
These speci®cations are for information only. If you have any questions, see the service manual for the chassis or
refer to the body manufacturer's publications.
Normal Maintenance Replacement Parts
VIN Code V T Z U G
Oil Filter* PF44 PF44 PF44 PF44 PF454
Engine Air
Cleaner /Filter*A1519C² A1519C² A1519C² A1518C A1518C
Passenger
Compartment Air
Filter Kit**52485513 52485513 52485513 52485513 52485513
PCV Valve* CV2001±C CV2001±C CV2001±C CV2001±C Ð
Spark Plugs²²41±974*
/PZTR5A15²²41±974*
/PZTR5A15²²41±974*
/PZTR5A15²²41±974*
/PZTR5A15²²41±983*
Fuel Filter* GF626 GF626 GF626 GF626 GF626
5-121

Maintenance Schedule......................................6-2
Introduction...................................................6-2
Your Vehicle and the Environment....................6-2
Maintenance Requirements..............................6-2
How This Section is Organized.........................6-3
Part A: Scheduled Maintenance Services...........6-4
Using Your Maintenance Schedule....................6-4
Scheduled Maintenance...................................6-5
Part B: Owner Checks and Services................6-11
At Each Fuel Fill..........................................6-11
At Least Once a Month.................................6-11
At Least Twice a Year...................................6-12
At Least Once a Year...................................6-13Part C: Periodic MaintenanceInspections.........6-16
Steering and Suspension Inspection................6-16
Exhaust System Inspection............................6-16
Fuel System Inspection..................................6-16
Engine Cooling System Inspection...................6-17
Transfer Case and Front Axle (Four-Wheel
Drive) Inspection.......................................6-17
Brake System Inspection................................6-17
Part D: Recommended Fluids and Lubricants. . . .6-18
Part E: Maintenance Record...........................6-20
Section 6 Maintenance Schedule
6-1

Maintenance Schedule
Introduction
Important: Keep engine oil at the proper level and
change as recommended.
Have you purchased the GM Protection Plan? The Plan
supplements your new vehicle warranties. See your
Warranty and Owner Assistance booklet or your dealer
for details.
Your Vehicle and the Environment
Proper vehicle maintenance not only helps to keep your
vehicle in good working condition, but also helps the
environment. Improper vehicle maintenance can
even affect the quality of the air we breathe. Improper
¯uid levels or the wrong tire in¯ation can increase
the level of emissions from your vehicle. To help protect
our environment, and to keep your vehicle in good
condition, be sure to maintain your vehicle properly.
Maintenance Requirements
Maintenance intervals, checks, inspections and
recommended ¯uids and lubricants as prescribed in this
manual are necessary to keep your vehicle in good
working condition. Any damage caused by failure
to follow scheduled maintenance may not be covered by
warranty.
6-2