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3. Firmly set the parking brake.
4. Press and maintain firm pressure on the brake pedal.
5. Using the screwdriver or other suitable tool, press and
hold the override tab through the access port (ringed
circle) on the bottom of the steering column. 6. Move the shift lever into the NEUTRAL position.
7. The vehicle may then be started in NEUTRAL.
Five–Speed Automatic Transmission (545RFE) —
5.7L Engine Only
The shift lever display located in the instrument panel
cluster indicates the transmission gear range. The shift
lever is mounted either on the right side of the steering
column (if equipped) or on the floor console (if
equipped). You must press the brake pedal to move the
shift lever out of the PARK position. To drive, move the
shift lever from PARK or NEUTRAL to the DRIVE
position. Pull the shift lever toward you when shifting
into REVERSE or PARK, or when shifting out of PARK.
Electronic Range Select (ERS) Operation
The Electronic Range Select (ERS) shift control allows
you to limit the highest available gear when the shift
lever is in the DRIVE position. Move the console shift
lever left (-) or right (+), or toggle the switch on theInterlock Manual Override268 STARTING AND OPERATING
Page 270 of 472

column shift lever down (-) or up (+) to select the desired
top gear. For example, if the driver shifts the transmission
into 3 (third gear), the transmission will never shift above
third gear, but can shift down to 2 (second gear) or 1 (first
gear), when needed. On vehicles equipped with 5.7L engines, use of ERS (or
“TOW/HAUL” mode) also enables an additional under-
drive gear which is not normally used during through-
gear accelerations. This additional gear improves vehicle
performance and cooling capability when towing a trailer
on certain grades. In ERS mode, first through third gear
are underdrive gears, and fourth gear is direct drive. ERS
fifth gear (Overdrive) is the same as the normal fourth
gear.
When in the DRIVE position in first through fourth gear,
the first tap down (-), will display the ERS designation for
the current gear (the transmission will not downshift).
For example, if you are in DRIVE and are in third (direct)
gear, when you tap the shift lever/switch one time in the
(-) direction, the display will show 4 (ERS 4 is direct gear).
Another tap down (-) will shift the transmission down to
ERS 3 (the added underdrive gear). When in the DRIVE
position in fifth gear, the first tap down (-) will downshiftColumn Shift Lever
5 STARTING AND OPERATING 269
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the transmission and display 5 (ERS 5 is the same as
normal fourth gear). Another tap down (-) will shift the
transmission down to ERS 4 (direct gear).
To exit ERS mode, press and hold the top of the switch/
shift lever in the (+) direction until “D” is once again
highlighted in the instrument cluster display.
WARNING!Do not downshift for additional engine braking on a
slippery surface. The drive wheels could lose their
grip and the vehicle could skid.
Screen Display 12345D
Actual Gear(s)
Allowed 1 1-2 1-3 1-4 1-5 1-5 NOTE: To select the proper gear position for maximum
deceleration (engine braking), press and hold the ERS (-)
button. The transmission will shift to the lowest range
possible without overspeeding the engine.
Gear Ranges
Do not race the engine when shifting from PARK or
NEUTRAL position into another gear range.
PARK
This range supplements the parking brake by locking the
transmission. The engine can be started in this range.
Never use PARK while the vehicle is in motion. Apply
the parking brake when leaving the vehicle in this range.
Always apply the parking brake first, then place the shift
lever in the PARK position. On four-wheel drive vehicles,
be sure that the transfer case is in a DRIVE position.270 STARTING AND OPERATING
Page 273 of 472

Overdrive Operation
The Overdrive automatic transmission contains an elec-
tronically controlled fourth and fifth gear (Overdrive).
The transmission will automatically shift from DRIVE to
Overdrive if the following conditions are present:
• the shift lever is in DRIVE;
• the engine coolant (antifreeze) has reached normal
operating temperature;
• vehicle speed is above approximately 30 mph (48 km/h);
• the “TOW/HAUL” switch has not been activated;
• transmission has reached normal operating temperature.
NOTE: If the vehicle is started in extremely cold tem-
peratures, the transmission may not shift into Overdrive
and will automatically select the most desirable gear for operation at this temperature. Normal operation will
resume when the transmission fluid temperature has
risen to a suitable level.
If the transmission temperature gets extremely hot, the
transmission will automatically select the most desirable
gear for operation at this temperature. If the transmission
temperature becomes hot enough, the “Transmission
Temperature Warning Light” may illuminate and the
transmission may downshift out of Overdrive until the
transmission cools down. After cool down, the transmis-
sion will resume normal operation.
The transmission will downshift from Overdrive to
DRIVE if the accelerator pedal is fully pressed at vehicle
speeds above approximately 35 mph (56 km/h).
When To Use “TOW/HAUL” Mode
When driving in hilly areas, towing a trailer, carrying a
heavy load, etc., and frequent transmission shifting oc-
curs, press the “TOW/HAUL” switch. This will improve272 STARTING AND OPERATING
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performance and reduce the potential for transmission
overheating or failure due to excessive shifting. When
operating in the “TOW/HAUL” mode, fifth gear is
disabled and 2-3 and 3-4 shift patterns are modified. Shifts into Overdrive (normal fourth gear) are allowed
during steady cruise (for improved fuel economy) and
automatic closed-throttle downshifts to direct gear and a
special underdrive gear (refer to “Electronic Range Se-
lect” in this section) are performed (for improved brak-
ing) when driving conditions warrant.
The “TOW/HAUL Indicator Light” will illuminate in the
instrument cluster to indicate when the switch has been
activated. Pressing the switch a second time restores
normal operation. If the “TOW/HAUL” mode is desired,
the button must be pressed each time the engine is
started.
Torque Converter Clutch
A feature designed to improve fuel economy has been
included in the automatic transmission on your vehicle.
A clutch within the torque converter engages automati-
cally at calibrated speeds. This may result in a slightly
different feeling or response during normal operation inTOW/HAUL Switch
5 STARTING AND OPERATING 273
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the upper gears. When the vehicle speed drops or during
acceleration when the transmission downshifts to second
gear, the clutch automatically disengages.
NOTE:
• The torque converter clutch will not engage until the
transmission fluid and engine coolant (antifreeze) are
warm [usually after 1 to 3 miles (1.6 to 4.8 km) of
driving]. Because the engine speed is higher when the
torque converter clutch is not engaged, it may seem as
if the transmission is not shifting into Overdrive when
cold. This is normal. Pressing the “TOW/HAUL”
switch when the transmission is sufficiently warm will
demonstrate that the transmission is able to shift into
and out of Overdrive.
• If the vehicle has not been driven in several days, the
first few seconds of operation after shifting the trans-
mission into gear may seem sluggish. This is due to the
fluid partially draining from the torque converter into the transmission. This condition is normal and will not
cause damage to the transmission. The torque con-
verter will refill within five seconds of shifting from
PARK into any other gear position.
FOUR-WHEEL DRIVE OPERATION —
IF EQUIPPED
Four-wheel drive trucks are equipped with either a
manually shifted transfer case or an electronically shifted
transfer case. Refer to the operating instructions for your
transfer case, located in this section for further informa-
tion.
Manually Shifted Transfer Case – If Equipped
The transfer case provides four mode positions.
• Two-wheel drive high range (2H)
• Four-wheel drive high range (4H)
• Neutral (N)274 STARTING AND OPERATING
Page 277 of 472

Because four-wheel drive provides improved traction,
there is a tendency to exceed safe turning and stopping
speeds. Do not go faster than road conditions permit.
NOTE: Delayed shifts out of four-wheel drive may be
experienced due to uneven tire wear, low or uneven tire
pressures, excessive vehicle loading, or cold tempera-
tures.
WARNING!You or others could be injured if you leave the
vehicle unattended with the transfer case in the
NEUTRAL position without first fully engaging the
parking brake. The transfer case NEUTRAL position
disengages both the front and rear driveshafts from
the powertrain and will allow the vehicle to move
regardless of the transmission position. The parking
brake should always be applied when the driver is
not in the vehicle. For additional information on the appropriate use of each
transfer case mode position, see the information below:
2H
Rear-Wheel Drive High Range - This range is for normal
street and highway driving on dry hard surfaced roads.
4H
Four-Wheel Drive High Range - This range locks the
front and rear driveshafts together forcing the front and
rear wheels to rotate at the same speed. Additional
traction for loose, slippery road surfaces only.
N
Neutral - This range disengages the front and rear
driveshafts from the powertrain. To be used for flat
towing behind another vehicle. Refer to “Recreational
Towing” in “Starting and Operating” for further
information.276 STARTING AND OPERATING
Page 278 of 472

4L
Four-Wheel Drive Low Range - This range locks the front
and rear driveshafts together forcing the front and rear
wheels to rotate at the same speed. Additional traction
and maximum pulling power for loose, slippery road
surfaces only. Do not exceed 25 mph (40 km/h).
Shifting Procedure – Manually Shifted Transfer
Case
2H ⇔ 4H
Shifting between 2H and 4H can be made with the
vehicle stopped or in motion. If the vehicle is in motion,
shifts can be made up to 55 mph (88 km/h). With the
vehicle in motion, the transfer case will engage/
disengage faster if you momentarily release the accelera-
tor pedal after completing the shift. Apply a constant
force when shifting the transfer case lever. 2H or 4H ⇔ 4L
With the vehicle rolling at 2 to 3 mph (3 to 5 km/h), shift
the transmission into NEUTRAL. While the vehicle is
coasting at 2 to 3 mph (3 to 5 km/h), shift the transfer
case lever firmly to the desired position. Do not pause in
transfer case NEUTRAL.
NOTE:
• Pausing in transfer case NEUTRAL in vehicles
equipped with an automatic transmission may require
shutting the engine OFF to avoid gear clash while
completing the shift. If difficulty occurs, shift the
transmission into NEUTRAL, hold foot on brake, and
turn the engine OFF. Make shift to the desired mode.
• Shifting into or out of 4L is possible with the vehicle
completely stopped, however difficulty may occur due
to the mating clutch teeth not being properly aligned.
Several attempts may be required for clutch teeth
alignment and shift completion to occur. The preferred
5 STARTING AND OPERATING 277