headlamp GMC SONOMA 1999 Owner's Guide

6-66
Name Usage
LT TRN Left Turn Signal Rear
RT TRN Right Turn Signal Rear
RR PRK Right Rear Parking Lamps
TRL PRK Not Used
LT HDLP Left Headlamp
RT HDLP Right Headlamp
FR PRK Front Parking Lamps
INT BAT I/P Fuse Block Feed
ENG I Engine Sensors/Solenoids, MAF,
CAM, PURGE, VENT
ECM B Engine Control Module, Fuel Pump
Module, Oil Pressure
ABS Anti
-Lock Brake System
ECM I Engine Control Module Injectors
BTSI Automatic Transmission Shift Lock
Control System
B/U LP Back
-Up Lamps
A/C Air Conditioning
W/W PMP Not Used
HORN Horn
IGN B Column Feed, IGN 2, 3, 4
RAP Retained Accessory Power
LD LEV Not UsedName Usage
OXYSEN Oxygen Sensor
IGN E Engine
MIR/LKS Mirrors, Door Locks
FOG LP Fog Lamps
IGN A Starting and Charging IGN 1
STUD #2 Accessory Feeds, Electric Brake
PARKLP Parking Lamps
LR PRK Left Rear Parking Lamps
IGN C Starter Solenoid, Fuel Pump,
PRNDL
HTDSEAT Not Used
HVAC HVAC System
TRCHMSL Not Used
RRDFOG Not Used
TBC Truck Body Computer
CRANK Clutch Switch, NSBU Switch
HAZLP Hazard Lamps
VECHMSL Vehicle Center High
-Mounted
Stoplamp
HTDMIR Heated Outside Mirrors
ATC Transfer Case (Four
-Wheel Drive)
STOPLP Stoplamps
RR W/W Not Used

6-67
Replacement Bulbs
Lamps Quantity Number
Halogen Headlamps, Composite Low
-Beam2 9006 HB4
Halogen Headlamps, Composite High
-Beam2 9005 HB3
Tail and Stoplamps 2 3057
Front Sidemarker Lamps 2 194
Front Turn Signal Lamps 2 3157NA
Center High
-Mounted Stoplamp2 577
Capacities and Specifications
Please refer to ªRecommended Fluids and Lubricantsº in the index for more information. See refrigerant change label
under the hood for charge capacity information and requirements.
Engine 2200 L4 ªVORTECº 4300 V6 ªVORTECº 4300 V6
Type L4 V6 V6
VIN Code 4,5 X W
Firing Order
1
-3-4-21-6-5-4-3-21-6-5-4-3-2
Horsepower (T Series) N/A 180 at 4,400 rpm 190 at 4,400 rpm
Horsepower (S Series) 120 at 5,000 rpm 175 at 4,400 rpm 180 at 4,400 rpm
Thermostat Specification
195
F (91
C) 195
F (91
C) 195
F (91
C)
Spark Plug Gap 0.040 inches
(1.01 mm)0.060 inches
(1.52 mm)0.060 inches
(1.52 mm)