
I Maintenance  Schedule I - Diesel Engines I 
0 Check the exhaust pressure  regulator  valve for proper operation; 
correct  any binding.  Inspect  hoses  for  cracks,  chafing or decay.  Replace 
parts  as needed. 
Arl Emission Control Service. 
0 Check  readfront  axle  fluid level and add fluid as needed.  Check 
constant  velocity joints and axle seals  for leaking. 
:c‘c 
DATE  SERVICED BY: ACTUAL  MILEAGE 
The services shown in this schedule  up to 60,000 miles ( 100 000 km) should 
be  performed  after  60,000  miles 
( 100 000 km) at  the  same intervals. 
Footnotes 
‘:’* Drive  axle  service: 
0 
0 
0 
0 
Locking Differential - Drain fluid and  refill  at  first engine oil change. 
At  subsequent 
oil changes,  check fluid level  and  add  fluid as needed. If 
driving 
in dusty  areas 01- towing a trailer,  drain fluid and  refill  every 
15,000  miles 
(25 000 km). 
Standard Differential 
- Check fluid  level and add  fluid as needed  at 
every  engine  oil change. 
If driving in dusty  areas or towing a  trailer. 
drain fluid  and  refill every 
15.000 miles (25 000 km). 
More frequent  lubrication  may  be  required  for heavy-duty  or off-road 
use. 
3500 HD  Models  with applications requiring extreme overload/trailer 
towing conditions  and high  speed  (above 
45 mph or 72 km/h) 
conditions  for  extended periods  of time  must  have the drive axle fluid 
changed  every 
3,000 miles (5 000 km)  or 3 months, whichever  occurs 
first,  or  must  use 
75W-140 synthetic fluid  meeting GM specifications. 
See  “Recommended  Fluids and Lubricants” 
in this section. 
7-80 
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Lamps (continued) 
Lamp  and Bulb  Data 
........................................... 6-88 
Reading 
..................................................... 2-51 
Replacement  (See “Bulb  Replacement“) 
Underhood  Reel Lamp 
......................................... 2-52 
Lights ......................................................... 2-70 
Air Bag Readiness Light 
................................... 1-20,  2-71 
Anti-.  Lock  Brake System  Warning  Light 
........................... 2-73 
Brake System  Warning Light 
.................................... 2-72 
Charging  System  Warning Light 
.................................. 2-76 
Daytime  Running  Lamps (DRL) Indicator Light 
................ 2-50,  2-77 
Check 
Gages Light 
............................................ 2-77 
Glow  Plugs Light 
............................................. 2-75 
Headlamp  High Beam Indicator Light 
............................. 2-78 
Headlights  (See  “Headlamps”)  Low Coolant  Warning Light 
................................ 2-75,  6-38 
Malfunction  Indicator 
..................................... 2-76,  6-57 
Safety  Belt Reminder  Light 
..................................... 2-71 
Service  Throttle  Soon 
.......................................... 2-74 
ShiftLight 
.............................................. 2-25, 2-78 
Turn Signal  and Lane Change  Indicator Light .................. 240,  2-79 
Water 
in Fuel  (Diesel  Engine) .................................... 2-74 
Loading  Your  Vehicle 
............................................ 4-37 
Trailering  Package 
............................................ 4-39 
Truck-Camper  Loading 
........................................ 4-39 
Lock  Cylinders  (See “Key Lock Cylinders“) 
Loss of  Control  (See “Driving-Loss 
of Control”) 
Lubrication  (See  “Recommended Fluids and Lubricants“) 
M 
Malfunction  Indicator  Lamp  (See “Lights”) 
Maintenance  (See “Scheduled  Maintenance  Services”) 
Master  Cylinder  (See  “Brakes”) 
Mirrors  Convexoutside 
............................................... 2-56 
Electric  Outside  Rearview  Mirrors 
................................ 2-56 
Electrochromic  Inside  Rearview  Mirror 
............................ 2-54 
Inside 
....................................................... 2-53 
Outside 
..................................................... 2-56 
ModelReference 
.................................................. iv 
Multifunction  Lever .............................................. 2-39 
N 
Noise  Control  System ............................................ 6-14 
0 
Odometer  (See “Gages“) 
Off-Road  Driving (See  ”Driving-Off  Road  Driving”) 
Off-Road  Recovery 
............................................... 4-9 
6 
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Oil DieselEngines 
............................................... 6-21 
Additives 
................................................. 6-25 
Pressure  Gage  (See  “Gages” 
j 
ToCheck ................................................. 6-22 
WhatKindtoUse 
.......................................... 6-23 
WhentoAdd 
.............................................. 6-22 
WhentoChange 
............................................ 6-25 
What  to  Do  with  Used  Oil 
.................................... 6-25 
Gasoline  Engines 
............................................. 6-16 
Additives 
................................................. 6-20 
Pressure  Gage  (See  “Gages”) 
ToCheck 
................................................. 6-16 
WhatKindtoUse 
.......................................... 6-17 
WhentoAdd .............................................. 6-17 
When to Change ............................................ 6-20 
What  to  Do  with Used 
Oil .................................... 6-21 
Owner  Checks  and Services 
........................................ 7-93 
Parking  Brake  (See “Brakes-Parking”) 
On  Hills  (See “Towing-Parking  on  Hills’*j 
Over  Things  That  Burn 
........................................ 
Passing (See  “Drivin~-Passing”) 
Periodic Maintenance  Inspections  (See “Scheduled  Maintenance  Services”) 
Power 
Door  Locks  (See “Dood’j  2-31 
Steering 
...................................................... 4-7 
Steering  Fluid 
................................................ 640 
Take-Off 
.................................................... 4-35 
Winches 
..................................................... 4-34 
Radiator  Pressure  Cap 
............................................ 6-39 
Radio  (See “Audio  Systems”) 
Rear Axle  (See  ”Axle”) 
Recommended  Fluids and Lubricants  (See “Scheduled  Maintenance  Services“) 
Recovery  Hooks 
................................................. 5-40 
Replacement  Parts ............................................... 6-80 
Reporting  Safety  Defects  To The  United  States Government  (See “Safety  Defects”) 
Roadside  Assistance 
............................................... 8-5 
Rocking  Your  Vehicle ............................................ 5-39 
Rear Window  Defogger 
............................................ 3-4 
Safety  Belts ..................................................... 1-9 
Adults ...................................................... 1-12 
Center  Passenger  Position ....................................... 1-25 
Checking  Restraint  System ...................................... 1-44 
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Child Restraints ............................................... 1-33 
Center  Seat Position 
......................................... 1-38 
Larger Children ............................................ 
Properwear ................................................. 1-12 
Rear  Seat Outside  Passenger  Positions  (Crew Cab) ................... 1-29 
Rear  Seat Outside  Passenger  Positions  (Extended 
Cab) ................ 1-26 
Reminder Light (See "Lights") 
Replacing  Seat  and  Restraint  Parts  After 
a Crash ..................... 144 
Lap-Shoulder  Belt .................................. 1-13 . 1-27 . 1-29 
Questions & Answers .......................................... I -12 
Rear  Seat Passengers 
........................................... 1-26 
Right  Front  Passenfer Position ................................... 1-25 
Use During Pregnancy ......................................... 1-24 
Why  Safety  Belts  Work 
......................................... 1-10 
Safety Chains  (See  "Towing a Trailer") 
Safety  Defects  Reporting  Safety Defects 
to the  Canadian Governrnent ................. 8-5 
Reporting  Safety  Defects  to  General  Motors ......................... 8-5 
Reporting  Safety  Defects  to  the  United  States Governnlent .............. 8-4 
Safety WarninFs  and  Symbols ......................................... v 
Scheduled Malntenance  Serviccs 
Maintenance  Record 
.......................................... 7- 100 
Maintenance  Schedule I 
Diesel Engines ......................................... 7-9.7-62 
Gasoline  Engines  with  Heavy  Duty Emissions 
................ 7-6 . 7-35 
Gasoline  Engines  with  Light  Duty Emissions 
................. 74 . 7-12 
Diesel  Engines 
........................................ 7-1 I, 7-80 
Gasoline  Engines  with  Heavy  Duty Emissions 
................ 7-8 . 7-52 
Gasoline  Engines  with  Light  Duty Emissions 
................. 7-5,  7-27 
Periodic  Maintenance  Inspections 
................................ 7-97 
Recommended  Fluids  and Lubricants .............................. 7-98 
Selecting  the  Right  Schedule 
..................................... 7-3 
Using 
Your Maintenance  Schedule ................................. 7-3 
Maintenance  Schedule 
IT 
WhenTrailerTowing .......................................... 4-49 
Seats ........................................................... 1-1 
Controls ...................................................... 1-1 
Easy Entry 
Seat ................................................ 1-5 
Head  Restraints ................................................ 1-7 
ManualFrontSeat .............................................. 1-1 
Power  Lumbar  Adjustment ....................................... 1-3 
Powerseats ................................................... 1-2 
Rear Folding Seat .............................................. 1-7 
RearSeat ..................................................... 1-8 
8 
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