2000 GMC SIERRA Owner's Manual

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Center Instrument Panel Utility Block
The center instrument panel utility block is located
underneath the instrument panel, to the left of the
steering column.
Relay Name Usage
SEO Special Equipment Option
HTD ST Heated Seats
SPARE 4 Not UsedRelay Name Usage
VANITY Headliner Wiring
TRAILER Trailer Brake Wiring
PWR ST Power Seats
SPARE 5 Not Used
CLUTCH Manual Transmission
Clutch Switch
UPF Upfitter
PARK LAMP Parking Lamps
FRT PRK EXPT Not Used
SL RIDE Manual Selectable Ride Switch
SPARE 2 Not Used
RR PRK LP Not Used
RR FOG LP Not Used
SPARE 3 Not Used
INAV PWR Interior Lights Feed
CTSY LP Courtesy Lamps
CEL PHONE Cellular Telephone Wiring

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Underhood Electrical CenterThe underhood electrical center is located on the
driver's side of the engine compartment near the battery.
Lift the cover for access to the fuse/relay block.
You can remove fuses with a fuse extractor. The fuse
extractor is located in the underhood electrical center. To
remove fuses if you don't have a fuse extractor, hold the
end of the fuse between your thumb and index finger
and pull straight out.

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Name Usage
STUD #1 Accessory Power/Trailer
Wiring Feed
ABS Anti
-Lock Brakes
IGN A Ignition Switch
AIR A.I.R. System
RAP #1 Retained Accessory Power, Power
Mirrors, Power Door Locks,
Power Seat(s)
IGN B Ignition Switch
RAP #2 Not Used
STUD #2 Accessory Power/Trailer Wiring
Brake Feed
TRL R TRN Right Turn Signal Trailer Wiring
TRL L TRN Left Turn Signal Trailer Wiring
IGN 1 Ignition, Fuel Controls
INJ B Ignition, Fuel Controls (Relay)
STARTER Starter (Relay)
PARK LP Parking Lamps
FRT HVAC Climate Control System
STOP LP Exterior Lamps, Stoplamps
ECM 1 VCM/PCM
CHMSL Center High Mounted Stoplamp
VEH STOP Stoplamps, Cruise Control
TRL B/U Backup Lamps Trailer WiringName Usage
INJ A Fuel Controls, Ignition
RR HVAC Not Used
VEH B/U Vehicle Backup Lamps
ENG 1 Engine Controls, Canister Purge,
Fuel System
ETC Electronic Throttle Control
IGN E A/C Compressor Relay, Rear
Window Defogger, Daytime
Running Lamps, A.I.R. System
B/U LP Backup Lamps, Automatic
Transmission Shift Lock
Control System
ATC Automatic Transfer Case
RR DEFOG Rear Window Defogger, Heated
Mirrors (Relay)
RR PRK Right Rear Parking Lamps
ECM B VCM/PCM
F/PMP Fuel Pump (Relay)
O2 A Oxygen Sensors
O2 B Oxygen Sensors
LR PRK Left Rear Parking Lamps
RR DEFOG Rear Window Defogger,
Heated Mirrors
HDLP Headlamps (Relay)

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Name Usage
TRL PRK Parking Lamps Trailer Wiring
RT HDLP Right Headlamps
DRL Daytime Running Lamps (Relay)
HTD MIR Heated Mirrors
LT HDLP Left Headlamps
A/C Air Conditioning
AUX PWR Cigarette Lighter, Auxiliary
Power Outlets
SEO 2 Special Equipment Option Power,
Power Seats, Aux Roof Mnt Lamp
SEO 1 Special Equipment Option Power,
Aux Roof Mnt Lamp, Cell Phone
DRL Daytime Running Lamps
A/C A/C (Relay)
FOG LP Fog Lamps
FOG LP Fog Lamps (Relay)
RADIO Audio System, Instrument Cluster,
Climate Control System
CIGAR Cigarette Lighter, Auxiliary
Power OutletsName Usage
RT TURN Right Turn Signals
BTSI Automatic Transmission Shift
Lock Control System
LT TURN Left Turn Signals
FR PRK Front Parking Lamps,
Sidemarker Lamps
W/W PMP Windshield Washer Pump
HORN Horn (Relay)
IGN C Ignition Switch, Fuel Pump,
PRND321 Display, Crank
RDO AMP Not Used
HAZ LP Exterior Lamps, Hazard Lamps
EXP LPS Not Used
HORN Horn
CTSY LP Interior Lamps
RR WPR Not Used
TBC Body Control Module, Remote
Keyless Entry, Headlamps

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Replacement Bulbs*
Low-Beam Headlamps2 9006
High
-Beam Headlamps2 9005
Daytime Running Lamps (DRL) 2 3157KX
Front Marker Lamp 2 194
Front Parking and Turn Lamp 2 3157NA
Rear Marker Lamp, Taillamp and Stop Lamp 2 3157
Taillamp and Stop Lamp** 2 1157
Rear Turn Lamp 2 3157
Rear Turn Lamp ** 2 1156
Back
-up Lamp2 3157
Back
-up Lamp **2 1156
Center High
-Mounted Stoplamp2 912
Cargo Lamp 2 912
* For replacement bulbs not listed here, please consult your dealer.
** Chassis Cab Models

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Capacities and Specifications
Please refer to ªRecommended Fluids and Lubricantsº in the Index for more information. See refrigerant charge label
under the hood for charge capacity information and requirements.
Engine Type VIN Code Spark Plug Gap
VORTEC 4300 V6 W 0.060 inches (1.52 mm)
VORTEC 4800 V8 V 0.060 inches (1.52 mm)
VORTEC 5300 V8 T 0.060 inches (1.52 mm)
VORTEC 6000 V8 U 0.060 inches (1.52 mm)
Wheels and Tires
Model Description Torque
C/K 1500 6 bolts (14mm)
140 lb
-ft (190 N´m)
C/K 2500 8 bolts (14mm)
140 lb
-ft (190 N´m)
Tire Pressure See the Certification/Tire label on the rear edge of the driver's door or the
incomplete vehicle document in the cab.

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6-73 Cooling System Capacity (Approximate)
After refill, the level must be rechecked. See ªCooling Systemº in the Index.
Engine Transmission Quantity
VORTEC 4300 V6 Automatic 12.6 quarts (11.9 L)
VORTEC 4300 V6 Manual 12.9 quarts (12.2 L)
VORTEC 4800 V8 Automatic 13.4 quarts (12.7 L)
VORTEC 4800 V8 Manual 13.7 quarts (13.0 L)
VORTEC 5300 V8 Automatic 13.4 quarts (12.7 L)
VORTEC 5300 V8** Automatic 14.9 quarts (14.1 L)
VORTEC 6000 V8 Automatic 14.8 quarts (14.0 L)
VORTEC 6000 V8* Automatic 14.4 quarts (13.6 L)
VORTEC 6000 V8 Manual 15.2 quarts (14.4 L)
VORTEC 6000 V8* Manual 14.8 quarts (14.0 L)
* Vehicles equipped with the optional engine oil cooler.
** Vehicles equipped with the optional air conditioner.