GMC ENVOY 1998 Owners Manual
Page 301 of 386
Vehicle  Identification  Number  (VIN) 
Gl SAMPLE4UXWM072675 Gl 
This is  the  legal  identifier for your vehicle.  It appears  on 
a  plate  in  the  front corner  of the instrument panel,  on  the 
driver’s  side. You can see it 
if you look through the 
windshield from  outside your vehicle.  The 
VIN also 
appears  on the  Vehicle  Certification  and Service Parts 
labels and the certificates 
of title and registration. 
Engine  Identification 
The  8th character in your  VIN  is  the  engine  code.  This 
code  will help  you identify  your engine,  specifications 
and replacement parts. 
Service  Parts  Identification  Label 
You‘ll find  this  label  on  the  inside of the glove box. It’s 
very  helpful if you ever  need  to order  parts. On this 
label 
is: 
0 your VIN, 
0 the  model designation, 
0 paint  information  and 
0 a list of all production options and 
special equipment. 
Be  sure that 
this label is not  removed  from the vehicle. 
Electrical  System 
Add-on  Electrical  Equipment 
NOTICE: 
Don’t  add  anything  electrical  to  your  vehicle 
unless  you  check  with 
your dealer  first.  Some 
electrical  equipment  can  damage  your  vehicle 
and  the  damage  wouldn’t  be  covered  by  your 
warranty.  Some  add-on electrical  equipment 
can  keep  other  components  from  working  as 
they  should. 
Your  vehicle has an air  bag  system. Before attempting to 
add anything electrical to  your vehicle, see “Servicing 
Your 
Air Bag-Equipped  Vehicle” in the Index. 
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.dshield Wipers 
I he windshield  wiper motor  is protected  by a circuit 
breaker and 
a fuse. If the motor overheats  due to  heavy 
snow  or ice, the wipers  will stop 
until the motor  cools. If 
the overload is caused  by some  electrical  problem, be 
sure  to  get 
it fixed. 
Power  Windows  and Other  Power  Options 
Circuit breakers  protect  the power windows  and  other 
power  accessories.  When the current  load is too  heavy, 
the  circuit  breaker  opens and  closes, protecting  the 
circuit 
until the problem  is fixed  or  goes away. 
Fuses  and  Circuit  Breakers 
The wiring  circuits in your  vehicle  are protected  from 
short  circuits  by a  combination  of fuses  and circuit 
breakers.  This greatly reduces the  chance 
of fires caused 
by  electrical  problems. 
Look at the  silver-colored  band inside the fuse. If the 
band 
is broken  or melted. replace the  fuse. Be sure  you 
replace  a bad  fuse 
with a new  one of the identical  size 
and rating. 
If you  ever  have a problem on the road and  don’t have 
a  spare  fuse,  you can borrow one that  has the same 
amperage.  Just pick  some  feature 
of your vehicle that 
you  can get 
along without -- like the radio  or  cigarette 
lighter 
-- and  use its fuse, if it is the correct  amperage. 
Replace 
it as soon as you can. 
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Instrument  Panel  Fuse  Block 
instrument panel. 
Remove  the  cover  by turning  the  fastener  to  the  left. 
Extra  fuses  and the  fuse  extractor 
are provided  in  the 
cover. 
To reinstall  the  fuse panel  cover, push  in  and turn 
the  fastener  to  the  right. 
Fuse/Circuit 
Breaker 
A 
B 
1 
Usage 
Not  Used 
Not  Used 
Headlamp  Switch,  Body Control 
Module,  Headlamp  Relay 
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FuseKircuit Usage 
Breaker 
2 
3 
4 
8 
9 
10 
11 
12  Cigarette 
Lighter, Data 
Link  Connector 
Cruise  Control  Module  and 
Switch,  Body  Control  Module, 
Heated  Seats 
Gages,  Body Control  Module, 
Instrument  Panel  Cluster 
Interior  Lights 
Not  Used 
Power  Outside  Mirror, Power 
Lock  Relay 
Courtesy  Lamps,  Battery 
Run-Down  Protection 
Not Used 
Turn  Signal 
Cluster,  Engine  Control  Module 
Parking  Lamps,  Power Window 
Switch,  Body Control  Module, 
Ashtray  Lamp 
FuseKircuit 
Breaker 
13 
14 
15 
16 
17 
18 
19 
20 
21 
22 
23 
24 
Usage 
Auxiliary Power 
Power Locks  Motor 
4WD  Switch,  Engine  Controls  (VCM,  PCM,  Transmission) 
Air Bag 
Front Wiper 
Not  Used 
Radio Battery 
Amplifier 
HVAC 
I (Automatic),  HVAC 
Sensors  (Automatic) 
Anti-Lock  Brakes 
Rear Wiper 
Radio, Ignition 
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Engine Compartment Fuse Block 
The fuse block is under the hood  at the driver’s  side of 
the  engine  compartment. 
Remove the cover 
by turning  the fastener  to  the left.  To 
reinstall the  fuse panel cover, push  in  and 
turn the 
fastener to 
the right. 
TRR TRN RTTRN STARTER 
rRL BU 
Name 
TRL  TRN 
TRR  TRN 
TRL 
BPU 
VEH B/U 
RT  TURN 
LT  TURN 
LT  TRN 
Usage 
Trailer Left Turn 
Trailer Right Turn 
Trailer 
Back-up Lamps 
Vehicle  Back-up Lamps 
Right Turn Signal  Front 
Left Turn Signal  Front 
Left  Turn  Signal Rear 
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Name 
RT TRN 
RR PRK 
TRL  PRK 
LT  HDLP 
RT HDLP 
LT  HI 
RT HI 
FR  PRK 
INT  BAT 
ENG 
I 
ECM B 
ABS 
ECM 
1 
HORN 
BTS 
I 
BIU LP 
IGN E 
AIC 
RAP 
OXYSEN 
Usage 
Right  Turn Signal  Rear 
Right Rear Parking Lamps 
Trailer Park  Lamps  Left  Headlamp 
Right Headlamp 
Left High  Beam 
Right High Beam 
Front  Parking  Lamps 
I/P Fuse Block  Feed 
Engine  SensorsISolenoids,  MAP, 
CAM.  PURGE,  VENT 
Engine Control  Module, Fuel Pump, 
Module,  Oil Pressure 
Anti-Lock  Brake  System 
Engine Control  Module  Injectors  Horn 
Brake-Transmission  Shift Interlock 
Back-up 
Lalllps 
Engine 
Air Conditioning 
Retained Accessory  Power 
Oxygen  Sensor 
Name 
IGN B 
DRL 
FOG LP 
IGN 
A 
STUD #2 
PARKLP 
LR PRK 
IGN C 
HTDSEAT  ATC 
RRDFOG 
HVAC 
TRCHMSL 
RR W/W 
CRANK 
LD LEV 
HI BEAM 
HAZLP 
VECHMSL 
HTDMIR 
STOPLP 
TBC 
Usage 
Column  Feed,  IGN 2, 3,4 
Daytime Running  Lamps 
Fog Lamps 
Starting and Charging  IGN 
I 
Accessory Feeds,  Electric  Brake 
Parking  La~nps 
Left  Rear Parking Lamps  Starter  Solenoid,  Fuel Pump. PRNDL 
Heated Seat 
Electronic  Transfer  Case 
Rear Defogger 
HVAC  System 
Trailer  Center High Mount  Stop Light 
Rear  Window  Wiper 
Clutch  Switch,  NSBU Switch 
Electronic  Load Leveling 
HID Headlamps  Hazard  Lamps 
Vehicle  Center High 
Mount Stop Lamp 
Heated  Mirror 
Stoplamps 
Truck  Body  Computer 
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Replacement Bulbs 
Lamps 
Halogen Headlamps,  Composite  High Beam 
Tail  and Stoplamps 
Front  Sidemarker  Lamps 
Front  Turn Signal  Lamps 
Turn  Signal  Lamps 
Quantity Number 
2 9005 HB3 
4  3057 
2 194 NA 
2 3  157 
2 3157 NA 
Capacities  and  Specifications 
Type .................................... V6 
Firing Order ...................... 1-6-5-4-3-2 
Horsepower 
................... 190 at 4,400 rpm 
Thermostat  Specification ........... 195°F (91  “C) 
Spark 
Plug Gap .......... 0.045 inches  (0.114  cm) 
Engine  Description 
............ “VORTEC” 
4300 
VINCode 
.................................W 
Wheels and Tires 
Wheel Nut Torque ........... 100  lb-ft  (140 N-m) 
Tire  Pressure ...... See the CertificatiodTire  label. 
See  “Loading  Your Vehicle”  in 
the Index. 
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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 GMC  dealer. 
Thermostat 
......................... 1255905 1 
Oil Filter ............................... PF52 
Air  Cleaner  Filter 
...................... A1 163C 
PCV  Valve 
.......................... CV746C 
Automatic Transmission Filter  Kit 
...... 24200796 
Spark  Plugs 
.......................... .41-932 
Fuel Filter 
............................. GF48 1 
Front Windshield Wiper  Blade 
................ Trico (20 inched50.8  cm) 
Backglass Wiper  Blade . . Trico  (14  inched35.6  cm) 
Capacities  (Approximate) 
Cooling System* ............. 11.7 quarts (1 1.1 L) 
Crankcase* ................... 4.5 quarts  (4.3 L) 
Automatic Transmission 
(Drain and Refill)* 
........... 5.0 quarts  (4.7 L) 
Differential Fluid ............................ 
Front ....................... 2.6 pints  (1.2 L) 
Rear ........................ 4.0 pints ( 1.9 L) 
Fuel Tank ..................... 18 gallons (68 L) 
A/C Refrigerant ........... 30 oz. or 2  lbs. (0.9 kg) 
of R- 134a 
*After  refill, the level 
must be checked. 
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Air  Conditioning  Refrigerants 
Not  all air conditioning  refrigerants are  the same. If the 
air  conditioning  system 
in your vehicle needs 
refrigerant,  be sure  the proper refrigerant 
is used. If 
you’re  not sure,  ask your dealer. 
Vehicle  Dimensions 
Wheelbase .............. 107.0 inches (271.8 cm) 
Length ................. 183.8 inches  (466.9 cm) 
Height ................... 64.2 inches (163.1  cm) 
Width 
................... 67.8 inches (1 72.2  cm) 
Front  Tread 
............... 57.3 inches ( 145.5 cm) 
Rear Tread 
............... 55.1 inches (1 39.9 cm) 
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NOTES 
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