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Front Seats
Bucket Seats
On vehicles with bucket seats, you can adjust the seats
several different ways.
Fore-and-Aft Adjustment
{CAUTION:
You can lose control of the vehicle if you try to
adjust the seat while the vehicle is moving. The
sudden movement could startle and confuse you,
or make you push a pedal when you do not want
to. Adjust the driver’s seat only when the vehicle is
not moving.You can adjust the seat forward or rearward with the
bar located under the front of the seat cushion.
Lift the bar to unlock the seat. Slide the seat to where you
want it and release the bar. Try to move the seat with
your body to be sure the seat is locked in place.
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Lumbar Adjustment
Your seats may have this feature.
The lumbar adjustment
knob is located on the
seatback, on the inboard
side of the driver’s seat and
on the outboard side of the
passenger’s seat.For more support to your lower back, turn the lumbar
adjustment knob clockwise. To decrease the amount of
lumbar support, turn the knob counterclockwise.
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Seatback Adjustment
{CAUTION:
You can lose control of the vehicle if you try to
adjust a manual driver’s seat while the vehicle is
moving. The sudden movement could startle and
confuse you, or make you push a pedal when you
do not want to. Adjust the driver’s seat only when
the vehicle is not moving.
{CAUTION:
If either seatback is not locked, it could move
forward in a sudden stop or crash. That could
cause injury to the person sitting there. Always
push and pull on the seatbacks to be sure they
are locked.The recline lever is located on the outboard side of the
driver’s and passenger’s seat cushions.
To recline the seatback, do the following:
1. Lift the recline lever.
2. Move the seatback to the desired position, then
release the lever to lock the seatback in place.
3. Push and pull on the seatback to make sure it is
locked.
To return the seatback to an upright position, do the
following:
1. Lift the lever fully without applying pressure to the
seatback and the seatback will return to the upright
position.
2. Push and pull on the seatback to make sure it is
locked.
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Split Bench Seat (80/20 Split)
If your vehicle has a split bench seat, the passenger
seat is not adjustable.
There is a storage area underneath the seat cushion.
SeeStorage Areas on page 2-53.
Air Suspension Seats
Your vehicle may have a low-back or high-back air
suspension seat. There are several ways to adjust
the seat.
Fore-and-Aft Adjustment
If your vehicle has this lever
it is located underneath the
front of the driver’s seat.
To slide the seat forward or rearward, move the lever
toward the outboard side of the seat. The seat will lock in
at 1/2 inch (1.5 cm) increments. Try to move the seat with
your body to be sure the seat is locked in place.
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Lumbar Adjustment
If your vehicle has a lumbar adjustment knob, it is
located on the inboard side of the driver’s seatback, or
on the outboard side of the passenger’s seatback.
For more support to your lower back, turn the lumbar
adjustment knob clockwise. To decrease the amount of
lumbar support, turn the knob counterclockwise.
Seatback Adjustment
Your vehicle has a seatback adjustment control located
on the outboard side of the seat.
Recline the seatback by turning the control
counterclockwise.
Return the seatback to an upright position by turning the
control clockwise. Lumbar Adjustment
Knob
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Page 337 of 376

(14)= Adjust tire pressures as indicated on the
Certification or Tire Information label for optimum tire
life. SeeTires on page 5-76for further details.
Check tires for excessive or abnormal wear or damage.
Also check for damaged wheels. Replace wheels
and/or tires as needed.
(15)= Check spring-to-axle U-bolts and shackle bolts
for proper torque. See the service manual for torque
sequence and specifications. When parts are replaced,
the torque must be checked and adjusted more often
during the first 6,000 miles (10 000 km). Check torque at
500 miles (800 km) and 2,000 miles (3 000 km) after
first use of parts.
(16)= Check complete exhaust system, including DPF
pressure lines, and cab areas near the exhaust system
for broken, damaged, missing, or out-of-position parts.
Also inspect for open seams, holes, loose connections, or
other conditions which could let exhaust fumes seep into
the driver compartment. Needed repairs should be made
at once. To help maintain system integrity, replace
exhaust pipes whenever a new muffler is put on.
(17)= Check all gasoline engine drive belts for cracks,
fraying, and wear. Replace as needed.
(18)= Adjust valve lash. Incorrect valve clearance will
result in increased engine noise and reduced engine
output.(19)= With the engine off and below normal operating
temperature, check to see that the thermostatically
controlled engine cooling fan can be rotated by hand on
viscous-operated drives. Replace as needed.
(20)= Check shields and underhood insulation for
damage or looseness. Adjust or replace as needed.
(21)= Inspect parking brake drum and linings for wear
or cracks and check linkage and adjustment.
(22)= Wheel bearing service:
•Grease type — Clean, inspect, and lubricate with
the proper wheel bearing grease at designated
intervals or when hubs are removed. SeePart C:
Recommended Fluids and Lubricants on page 6-31.
•Oil-filled type — Some wheel bearings are
lubricated by axle lubricant. When you have oil-filled
hubs, use lubricant identical to that used in the
axle. Lubricant change intervals are the same for
front and rear axles. However, you must maintain
the proper oil level between change intervals.
SeeFront Wheel Bearings with Oil-Filled Hubs on
page 5-75andPart C: Recommended Fluids
and Lubricants on page 6-31.
(23)= Check the air intake system installation to
see that gaskets are seated properly and all hose
connections, fasteners, and other components are tight.
Tighten connections and fasteners or replace parts
as required.
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