
Key in the Ignition 
If you  walk away from  your vehicle  with the keys  inside, it’s an easy target 
for  joy  riders  or professional  thieves 
- so don’t do it. 
When  you park your vehicle and open the  driver’s door, you‘ll  hear a tone 
reminding 
you to  remove  your  key from  the ignition and take it with  you. 
Always  do  this. 
Your steering  wheel will be locked,  and so will your 
ignition.  If  you have 
an automatic  transmission,  taking your key out also 
locks your transmission.  And remember  to lock the  doors. 
Parking at Night 
Park in a lighted  spot,  close  all windows and  lock your vehicle.  Remember 
to  keep 
your valuables  out of sight.  Put them in a storage  area,  or take them 
with 
you. 
Parking  Lots 
If you  park in a lot where  someone  will be watching your vehicle,  it‘s  best 
to  lock 
it up  and take  your  keys.  But what if you have to leave your ignition 
key?  What  if 
you have to leave  something valuable in your  vehicle? 
Put your valuables  in a storage area, like your  glove  box. 
Lock all the  doors  except the driver’s. 
New  Vehicle  “Break-In ” 
NOTICE: 
Your  modern  vehicle doesn’t  need  an  elaborate  “break-in.” But 
it  will  perform  better  in  the  long  run  if you  follow  these 
guidelines: 
Keep  your  speed  at 55 mph (88 km/h)  or  less for  the  first 500 
miles (804 km). 
Don’t  drive  at  any one speed - fast  or  slow - for the  first 
500  miles 
(804 km).  Don’t  make  full-throttle  starts. 
Avoid making  hard  stops  for  the  first 200 miles (322 km)  or 
so. During  this  time  your  new  brake  linings  aren’t  yet  broken 
in.  Hard  stops  with  new linings  can  mean  premature  wear  and 
earlier  replacement.  Follow  this  “breaking-in”  guideline 
every time  you  get  new brake  linings. 
Don’t tow a trailer  during  “break-in.” See  “Towing a Trailer” 
in  the  Index 
for more  information. 
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key in START  for no more  than ten seconds.  This  clears  the extra 
gasoline  from  the engine. 
If  the  engine  still  doesn’t  start,  wait another 
15 seconds and  do  Step 4 
again. 
When the  engine  starts,  let  go 
of the key  and the accelerator  pedal. 
NOTICE: 
Your  engine  is  designed  to  work  with  the  electronics  in  your 
vehicle. 
If you add  electrical  parts  or  accessories,  you could 
change  the 
way the  fuel  injection  system  operates.  Before  adding 
electrical  equipment,  check  with  your  dealer. 
If you  don’t,  your 
engine  might  not  perform  properly. 
If you  ever  have  to  have  your  vehicle  towed,  see  t,he part of this 
manual  that  tells  how to  do  it  without  damaging  your  vehicle. 
See  “Towing  Your  Vehicle” in  the  Index. 
To start your 5.7 Liter  (Code K) or 7.4 Liter  (Code N) V8 engine: 
1. Without pushing the accelerator  pedal,  turn your ignition key to 
START.  When the  engine  starts,  let  go  of the  key.  The  idle  speed will 
go  down  as your  engine gets warm. 
NOTICE: 
Holding  your  key in  START for longer  than 15 seconds  at a time 
will  cause  your  battery  to  be  drained  much  sooner.  And  the 
excessive  heat  can  damage  your  starter  motor. 
2. If it doesn’t  start right away, hold your key  in  START.  If it doesn’t start 
in three  seconds,  push the accelerator  pedal about  one-quarter of the 
way  down  for 
12 more seconds,  or until it starts. 
3. If your  engine  still won’t  start (or starts  but then  stops), it could  be 
flooded  with too much  gasoline.  Try this: 
4. Wait 15 seconds to let the starter  motor cool down.  Then push your 
accelerator  pedal 
all the way to the floor. Hold it there.  Then hold the 
key 
in START  for  no  more  than ten seconds.  This  clears  the extra 
gasoline  from 
the engine. If the  engine  still doesn’t  start,  wait another 
15 seconds  and do  Step 4 again. 
When 
the engine  starts,  let  go of the key and the  accelerator  pedal. 
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Hot  Engine  Restart (Vehicles With 5.7L LO5 Engine  and  Over 8500 lbs. 
GVWR): 
If your  engine  is already hot  and then  stalls,  turn your ignition  key to OFF. 
Then turn your  key to RUN and wait 20 seconds before  you restart your 
engine.  When the engine 
starts, let go of the key  and the accelerator pedal. 
NOTICE: 
Your  engine is designed  to  work  with the  electronics  in  your 
vehicle. 
If you  add  electrical  parts  or  accessories,  you  could 
change  the 
way the  fuel  injection  system  operates.  Before adding 
electrical  equipment,  check  with  your  dealer. 
If you  don’t,  your 
engine  might  not  perform  properly. 
If you ever have  to  have  your  vehicle  towed, see the  part of this 
manual  that  tells  how to  do  it  without  damaging  your  vehicle. 
See  “Towing  Your  Vehicle” in  the  Index. 
Driving  Through  Deep  Standing  Water 
NOTICE: 
If you drive  too  quickly  through  deep  puddles  or  standing  water, 
water  can  come  in  through  your  engine’s air  intake  and  badly 
damage  your  engine.  Never  drive  through  water  that  is  slightly \
lower  than  the  underbody  of your  vehicle. 
If you  can’t  avoid 
deep  puddles  or  standing  water,  drive  through  them  very 
slowly. 
Driving  In Snow (Diesel  Engines) 
When driving in a heavy snowstorm  or in swirling snow  with a diesel 
engine,  snow  can get into the air  intake system.  If  you keep driving 
in these 
conditions 
the air cleaner  may get plugged, causing black  smoke  and loss of 
power. In an emergency,  if the  air cleaner gets plugged  with  snow,  you can 
remove  the air cleaner.  Then,  drive  to 
a place of safety as soon as possible 
and 
put the  air cleaner back on. 
Starting  Your Diesel  Engine 
Your diesel  engine  starts  differently than a gasoline  engine. 
1. Automatic transmission: Move your shift lever  to PARK (P) or 
NEUTRAL 
(N). Your  engine  won’t start in any  other position - that’s 
a safety  feature. To restart  when you’re already  moving, use 
NEUTRAL  (N) only. 
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A CAUTION: 
Shifting out of PARK (f) or NEUTRAL (N) while  your engine is 
“racing”  (running at high speed) is dangerous.  Unless your foot 
is firmly  on  the brake pedal, your  vehicle could move  very 
rapidly. 
You could  lose control  and hit people  or objects.  Don’t 
shift out  of 
PARK (P) or NEUTRAL (N) while  your engine is 
racing. 
NOTICE: 
Damage  to  your transmission caused  by shifting out of PARK 
(P) or NEUTRAL (N) with  the engine racing  isn’t  covered  by 
your warranty. 
AUTOMATIC  OVERDRIVE (a) - This  position  is for  normal 
driving.  If  you need more power  for passing,  and you’re: 
- Going  less  than about 35 mph (56 km/h), push your accelerator 
pedal  about  halfway  down. 
the  way  down. 
You’ll  shift down to the next  gear and have  more power. 
- Going  about 35 mph (56 kdh)  or more, push the  accelerator all 
0 should not be used  when  towing  a  trailer, carrying a heavy load, 
driving  on steep hills,  or for  off-road  driving.  Select  THIRD 
GEAR 
(3) when  operating  the  vehicle under any  of these 
conditions. 
THIRD  GEAR (3) - This is like 63, but you never  go into  Overdrive. 
You  should  use 
THIRD GEAR (3) when towing a trailer. carrying  a 
heavy  load,  driving on steep  hills,  or 
for off-road  driving. 
0 SECOND  GEAR (2) - This position  gives  you more power  but lower 
fuel  economy.  You can use 
SECOND GEAR (2) on hills.  It can  help 
control 
your speed  as you go down  steep  mountain roads, but then  you 
would also want 
to use your brakes  off and  on. 
If you  manually  select  SECOND GEAR (2), the transmission will drive 
in second gear. You may use this  feature  for  reducing  torque  to the  rear 
wheels  when  you are trying 
to start  your  vehicle from a stop on 
slippery road  surfaces. 
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NOTICE: 
Driving with the  parking  brake  on  can  cause  your  rear  brakes to 
overheat.  You may  have  to  replace  them,  and  you could  also 
damage  other  parts  of your  vehicle.  Always  check  to  be  sure 
your  parking  brake  is fully  released  before  you drive. 
If you  are towing  a  trailer  and  are  parking  on  any  hill:  See “Towing a 
Trailer” in the Index.  That section  shows what to do first  to keep the trailer 
from moving. 
Propshaft  Brake  Burnish  Procedure 
If you have  a 3500 HD model, it is  recommended  that  the  propshaft  mounted 
parking  brake  be  burnished 
as part  of  the  new  vehicle  break in. The  parking 
brake  will  work  best  after 
it has  been  burnished  following  these  instructions. 
Make 
10 (ten)  stops,  using the parking brake  foot pedal, from  20 mph (32 
km/h)  about 
2 1/2 miles (4 km) apart.  In between  stops, drive the vehicle  at 
20  mph  (32  km/h). 
Torque  Lock 
When parking,  the weight  of the vehicle  may  put  too  much force on the 
parking  pawl 
in the transmission.  It  may  be difficult to pull the selector 
lever out  of 
PARK (P). This is called ”torque  lock.” To find out how  to 
avoid torque  lock, see “Torque Lock” later  in this  section. 
Shifting  lnto PARK (P) (Automatic 
Transmission  Models  Only) 
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Parking Your Vehicle  (Manual  Transmission 
Models  Only) 
Before you get out of your  vehicle, put your  manual transmission in 
REVERSE (R), turn off the engine,  and firmly  apply the parking  brake. 
If you have  four-wheel  drive, be sure  your transfer case is in a drive gear. 
Your vehicle  could  roll if it isn't. 
If  you  are parking  on 
a hill, or if your pulling  a trailer,  see "Parking  on 
Hills" or '"Towing a Trailer" in the Index. 
Parking Over Things That Burn 
1 A CAUTION: 
Things  that  can  burn  could  touch  hot  exhaust  parts  under  your \
vehicle  and  ignite.  Don't  park  over  papers,  leaves,  dry  grass 
or 
other  things  that  can  burn. 
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A CAUTION: 
Idling the engine with the air system  control  off could  allow 
dangerous exhaust  into your  vehicle  (see  the earlier  Caution 
under  “Engine Exhaust”). 
Also,  idling  in a closed-in  place can let deadly  carbon monoxide 
~ (CO) into your  vehicle  even if the fan  switch  is at the highest 
setting.  One place this can happen  is a garage. Exhaust 
- with 
CO - can  come  in  easily.  NEVER  park in a garage  with the 
engine running. 
Another  closed-in  place can  be 
a blizzard.  (See  “Blizzard” in the 
Index.) 
A CAUTION: 
It  can  be dangerous to  get out  of your  vehicle if the shift lever  is 
not  fully  in  PARK 
(P) with the  parking  brake  firmly set. Your 
vehicle  can roll.  Don’t  leave  your vehicle  when  the engine 
is 
running  unless you have to. If you’ve  left the engine running,  the 
vehicle  can move  suddenly.  You or others  could  be  injured. 
To be 
sure  your  vehicle  won’t  move,  even  when  you’re on fairly level 
ground, always set your  parking brake and move  the shift lever 
to  PARK 
(P). 
If  you  have four-wheel  drive and your transfer  case is in NEUTRAL  (N), 
your vehicle 
will be  free  to  roll,  even if your  shift lever is in  PARK  (P). So, 
be sure  the transfer  case is in a drive  gear - not in NEUTRAL (N). Always 
set your parking brake. Follow the proper  steps to be  sure  your  vehicle 
won’t  move.  See  “Shifting  Into  PARK 
(P)“ in the Index. 
If you’re pulling  a trailer. see ”Towing a Trailer“ in the Index. 
Four- Wheel Drive 
If your  vehicle  has  four-wheel  drive, you can send your engine‘s driving 
power 
to all four  wheels  for  extra  traction. To get the most satisfaction  out 
of  four-wheel  drive, you must be  familiar  with it’s  operation.  Read the part 
that  follows  before  using four-wheel  drive. 
You should use  2-WHEEL 
HIGH (2H)  for  most normal  driving  conditions. 
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You will see this light flash for a few seconds when  you  turn  your ignition 
to 
RUN or START. Then the light should go out.  This  means the system  is 
ready. 
If the air  bag readiness light doesn’t  come on  when  you  start your vehicle, 
or stays  on,  or  comes  on when  you are driving,  your air bag  system  may  not 
work properly. Have your vehicle serviced right away. 
Brake  System  Warning  Light 
Your  vehicle‘s hydraulic brake system is divided  into two parts. If one part 
isn’t  working,  the other  part can still  work  and  stop you. 
For good braking, 
though,  you  need  both  parts  working well. 
If the  warning light  comes on, there could  be a brake problem. Have your 
brake  system inspected right away. 
This  light should  come 
on briefly as you start  the vehicle.  If it doesn‘t  come 
on 
then, have it fixed so it will be  ready  to warn  you if there’s  a  problem. 
If the light  comes  on while you are driving,  pull off the  road  and  stop 
carefully.  You may  notice that  the pedal  is harder  to push. 
Or, the pedal  may 
the vehicle towed for service.  (See “Towing 
Your Vehicle’’ in the Index.) 
b 00 closer  to the floor. It may take longer  to stop. If the light  is still on, have 
A CAUTION: 
Your  brake  system  may  not  be  working  properly  if  the  brake 
system  warning  light  is on. Driving  with  the  brake  system 
warning  light  on  can  lead  to  an  accident.  If  the  light  is  st\
ill  on 
after  you’ve  pulled  off  the  road  and  stopped  carefully,  have\
  the 
vehicle  towed  for  service. 
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