Page 350 of 488
Service  Replacement  Part  and  Filter 
Recommendations 
- Gasoline  Engines 
Engine 4.3L 
VTN Z 
Oil Filter  PFS2 
Air  Cleaner 
A 178CW 
Filter 
PCV  Valve  CV789C 
Spark 
Plugs* .CR43TS 
Fuel Filter  GF48 
1 
Radiator  Cap 
RC36 
5.0L 
H 
PF12183- 
A348C 
cv774c 
.CR43TS 
GF48 
1 
RC36 
5.7L 
K 
PF1218q A348C 
cv774c 
.CR43TS  GF38 
1 
RC36 
+Four  Wheel  Drive  Vehicle 
- use a PFS2  oil filter 
Wse AC  copper-cored  resistor type spark plugs 
Service  Replacement  Part  and  Filter 
Recommendations 
- Diesel  Engines 
Engine 6.5L 6.5L 
VIN P S 
Oil Filter  PF1218 
PF1218 
Air  Cleaner  A644C 
A 1236C 
Fuel  Filter  TP 
1006  TP 
1 006 
Surge 
Tank Cap  RC33  RC33 
7.41 
N 
PF1218 
A348C 
cv774c 
.CR43TS  GF48 
I 
RC36 
6.51 
F 
PF1218 
A 1236C 
TP 
I006 
RC33 
6-84 
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        Page 353 of 488

Fuses and Circuit  Breakers 
POSITION NAME 
1. STOP/HAZ 
2. 
3. 
4. 
5. 
6. 
7. 
8. 
9. 
10. 
11. 
12. 
13. 
14. 
IS. 
16. 
17. 
18. 
19. 
20. 
21.  22. 
T CASE 
CTSY 
GAGES 
RR  HVAC 
CRUISE 
AUX PWR 
CRANK 
PARK  LPS 
AIR  BAG 
WIPER  HTR-A/C 
CIG  LTR 
ILLUM 
DRL-FOG 
TURN-B/U  RADIO 
BRAKE  RADIO 
BATT 
TRANS 
CIRCUITS  PROTECTED 
Stop/TCC  Switch,  Buzzer, CHMSL,  Hazard 
Lamps,  Stop  Lamps 
Transfer  Case 
Courtesy  Lamps,  Cargo  Lamp,  Glove  Box 
Light,  Dome/RDG  Lamps, Vanity Mirrors, 
Pwr Mirrors 
IP  Cluster,  DRL  Relay, HDLP  Switch, 
Keyless Entry, Low Coolant  Module 
RR  HVAC  Controls 
Cruise  Control 
Aux Power Outlet 
Diesel Fuel  Pump,  DERM,  ECM 
Lic Lamp, Park  Lamp, Tail Lamp,  Roof 
Marker  Lamp,  Tail Gate  Lamps,  Front Side 
Markers,  Fog Lamp  Relay, Door Switch 
Illum, Fender  Lamps 
DERM 
Wiper Motor, Washer  Pump 
A/C,  A/C Blower, High Blower Relay 
Power  Amp,  Cig  Lighter, Door Lock Relay, 
Pwr  Lumbar  Seat 
4WD,  Indicator,  LP Cluster,  HVAC 
Controls, 
RR HVAC  Controls,  IP  Switches, 
Radio  Illumination 
DRL  Relay, Fog  Lamp Relay 
Frt Turn, RR Turn, B/U Lps 
Radio  (Ign) 
DRAC,  4WAL PCM, ABS, Cruise 
Radio  (Batt) 
PRNDL,  Auto Transmission,  Speedo, 
Check  Gages 
Tell Tale 
Not Used 
Not Used 
6-87 
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        Page 356 of 488
LAMP OR BULB 
INSTRUMENT 
PANEL 
Daytime  Running 
Lamps Indicator? 
Charging  System 
Indicator  Lamp 
Instrument  Cluster 
Illumination 
Headlamp  Beam 
Indicator 
Directional  Signal 
Indicator 
Brake  Warning 
Indicator 
SIR (Air  Bag) 
Safety  Belt Warning 
Check  Gages  Indicator 
Malfunction  Indicator 
(“Service  Engine 
Soon”) Lamp 
Upshift  Indicator  Glow  Plugs  Lamp** 
Low  Coolant  Lamp** 
Water  in Fuel  Lamp** 
Service  Throttle  Soon 
Lamp** 
**Diesel  only 
“fanadian  Vehicles only 
TRADE NO. 
74 
74 
194 
74 
74 
74 
74 
74 
74 
74 
74 
74 
74 
74 
74 
1 
I 
6 
1 
2 
1 
6-90 
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        Page 358 of 488

How This  Section  is  Organized 
The  remainder of this section is divided  into  five parts: 
“Part A: Scheduled  Maintenance  Services” shows  what to have  done and 
how  often.  Some 
of these services can  be complex, so unless  you are 
technically  qualified and have the necessary  equipment, you should  let your 
dealer’s  service  department or  another qualified  service center  do these 
jobs. 
If you  are skilled enough to  do some  work  on  your vehicle,  you  will 
probably  want  to get the service information 
GM publishes.  See  “Service 
Publications” 
in the Index. 
“Part B: Owner  Checks  and  Services” tells  you  what  should be checked 
whenever  you stop  for fuel. 
It also explains  what  you  can  easily do to help 
keep 
your vehicle in good  condition. 
“Part  C: Periodic  Maintenance  Inspections” explains  important 
inspections  that your 
GM dealer’s service department  or another qualified 
service  center  should perform. 
“Part D: Recommended Fluids and  Lubricants” lists some  products GM 
recommends  to help  keep your vehicle properly maintained.  These products, 
or  their  equivalents,  should be  used  whether  you do the  work  yourself  or 
have it  done. 
“Part E: Maintenance  Record” provides  a place for you to record the 
maintenance  performed  on your vehicle. Whenever  any maintenance 
is 
performed,  be sure  to write it down in this part.  This will help you 
determine  when your next maintenance should  be done. 
In addition, it is a 
good idea to keep your maintenance receipts. They  may be needed  to 
qualify your  vehicle for warranty repairs. 
7-2 
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        Page 359 of 488

Part A: Scheduled  Maintenance  Services 
Using Your Maintenance Schedule 
We at General  Motors  want to help  you keep your vehicle in good working 
condition.  But  we don’t  know exactly  how you’ll  drive it. You  may  drive 
very  short  distances  only 
a few times  a week.  Or you  may  drive  long 
distances  all the time 
in very hot, dusty weather.  You  may use your vehicle 
in making  deliveries.  Or  you  may drive it to work, to  do  errands  or in many 
other  ways. 
Because 
of all  the different ways people  use their  GM vehicles, maintenance 
needs  varv. 
You may even  need more frequent  checks and replacements than 
you‘ll  find 
in the schedules in this  section. So please read  this section and 
note  how  you  drive. If you  have any  questions  on how  to keep your vehicle 
in good  condition.  see  your GM dealer. 
This  part  tells  you the maintenance  services  you should have  done and 
when 
you should  schedule  them. If you go to your  dealer  for  your service  needs, 
you’ll  know that  GM-trained  and  supported  service people 
will perform the 
work  using  genuine 
GM parts. 
The  proper  fluids  and  lubricants to use are listed 
in Part  D.  Make  sure 
whoever  services your  vehicle uses these. 
All parts  should  be replaced  and 
all  necessary  repairs  done before  you or anyone  else  drives  the vehicle. 
These  schedules  are  for  vehicles that: 
carry passengers and cargo  within recommended  limits. You will find 
these  limits  on your vehicle’s  CertificatiodTire  label.  See  “Loading 
Your  Vehicle“ 
in the Index. 
are  driven  on  reasonable  road surfxes  within  legal  driving limits. 
are driven  off-road in the recommended  manner.  See “Off Road 
Driving  With  Your  Four-wheel  Drive Vehicle” 
in the Index. 
use the recommended  unleaded fuel.  See “Fuel” in the index. 
Selecting  the  Right  Schedule 
The proper  maintenance  schedule for your vehicle  depends on which  engine 
you  have 
in your vehicle and  how  you  use your vehicle. 
Gasoline  engine  vehicles and diesel  engine  vehicles have different 
maintenance  requirements. 
If you have  a diesel  engine,  follow a schedule 
designated  for  diesel engine  vehicles only.  If  you have 
a gasoline  engine. 
you  must first  determine  whether your  engine has 
a light duty  or  a heavy 
duty  emissions  classification.  Follow a maintenance  schedule designated 
for 
for your  engine.  See  “Engine  Identification” in the Index  to find your 
engine‘s emission  classification. 
c easoline  engines with the emissions  classification  (light duty or heavy  duty) 
7-3 
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        Page 361 of 488

Every 30,000 Miles (50 000 km) 
Air Cleaner  Filter  Replacement 
Spark  Plug Replacement 
Fuel  Filter  Replacement 
Clutch 
Fork Ball  Stud  Lubrication  (5-Speed Manual Transmission  With 
Deep-Low  Only) 
Cooling  System  Service  (or every 
24 months, whichever  occurs  first) 
Every 50,000 Miles (83 000 km) 
Automatic  Transmission  Service  (severe  conditions only) 
Every 60,000 Miles (100 000 km) 
Engine Accessory  Drive Belt Inspection 
Spark Plug Wire Inspection 
Engine  Timing  Check 
Fuel Tank,  Cap and Lines Inspection 
Schedule 11 Definition - Gasoline  Engines  With  Light Duty 
Emissions 
Follow  Schedule I1 only if none of the conditions  from  Schedule I is true. 
Schedule  I1 Intervals - Gasoline Engines  With Light  Duty 
Emissions 
Every 
7,500 Miles (12 500 km) 
Engine  Oil and  Filter  Change  (or  every 12 months, whichever  occurs  first) 
Chassis  Lubrication  (or every 
12 months, whichever  occurs  first) 
Drive  Axle Service 
At 7,500 Miles (12 500 km) - Then  Every 15,000 Miles (25 000 km) 
Tire Rotation 
7-5 
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        Page 362 of 488

Every 30,000 Miles (50 000 km) 
Cooling System Service (or every 24 months) 
Spark  Plug Replacement 
Fuel  Filter  Replacement 
Air  Cleaner  Filter Replacement 
Front Wheel Bearing Repack 
Every 50,000 Miles (83 000 km) 
Automatic Transmission Service (severe conditions  only) 
Every 60,000 Miles (100 000 km) 
Spark  Plug Wire Inspection 
Engine  Accessory Drive Belt Inspection 
Fuel Tank, 
Cap and  Lines Inspection 
Engine  Timing Check 
Schedule 1 Definition - Gasoline  Engines  With  Heavy  Duiy 
Emissions 
I 
Follow Maintenance  Schedule I if any  one of these is true for your vehicle: 
0 Most  trips are less than 5 to 10 miles (8 to 16 km).  This  is particularly 
important  when outside  temperatures  are below freezing. 
Most  trips include extensive idling (such as frequent driving in stop and 
go traffic). 
You operate your vehicle  in dusty areas  or off-road  frequently. 
You frequently tow  a trailer. 
Schedule 
I should also be followed if the vehicle  is  used for delivery 
service,  police, taxi,  or  other  commercial application. 
7-6 
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        Page 363 of 488

Schedule I Intervals - Gasoline Engines  with  Heavy  Duty 
Emissions 
Every 
3,000 Miles  (5 000 km) 
Engine Oil  and Filter  Change  (or every 3 months, whichever  occurs  first) 
Chassis  Lubrication  (or every 
3 months,  whichever  occurs  first) 
Drive Axle  Service 
At 6,000 Miles (10 000 km) - Then  Every 12,000 Miles (25 000 km) 
Tire Rotation 
Every 12,000 Miles (20 000 km) 
Air Cleaner  Filter Inspection, if Driving in Dusty  Conditions 
Front Wheel  Bearing Repack  (or  at Each Brake Relining)  (2-Wheel Drive 
Only 
1 
Fuel Filter  Replacement 
Engine Accessory  Drive  Belt Inspection 
Shields 
and Underhood  Insulation  Inspection 
Thermostatically  Controlled  Engine Cooling  Fan Check  (or every 
12 
months, whichever  occurs  first) 
Every 24,000 Miles  (40 000 km) 
Cooling  System  Service  (or  every 24 months, whichever  occurs  first) 
Air  Cleaner  Filter Replacement 
Engine  Timing  Check 
Thermostatically  Controlled  Air Cleaner Inspection 
Air Intake  System Inspection 
Every 27,000 Miles (45 000 km) 
Spark Plugs Replacement 
Every 30,000 Miles  (50 000 km) 
Clutch Fork  Ball Stud Lubrication  (%Speed  Transmission with Deep-Low 
Only) 
7-7 
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