Chevrolet 2009 Silverado 1500 Pickup Spezifikationen PDF herunterladen (Seite 135)

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101

Turn the tow/haul mode on and off by pressing the

button, located on the end of the shift lever. When the

tow/haul is on, a light on the instrument panel cluster will

come on.

See Tow/Haul Mode Light on page 3-51 for more

information.

Also see “Tow Haul Mode” under Towing a Trailer on

page 4-50 for more information.

Grade Braking (Allison Transmission

or Hydra-Matic

6-Speed Automatic

Transmission)

The Grade Braking shift modes can be activated by

pressing the button on the end of the shift control lever.

While in Range Selection Mode, Grade Braking is

deactivated allowing the driver to select a desired range

of gears.

Grade Braking is only active while the Tow/Haul Mode

is selected and you are not in the Range Selection

Mode. See “Tow/Haul Mode listed previously and

Automatic Transmission Operation on page 2-28 for

more information on the Range Selection Mode. Grade

Braking assists in maintaining desired vehicle speeds

when driving on downhill grades by automatically

implementing a shift schedule that utilizes the engine

and transmission to slow the vehicle. This reduces wear

on the braking system and increases control of the

vehicle. Grade Braking monitors vehicle speed,

acceleration, engine torque and brake pedal usage.

Using this information, it detects when the truck is on a

downhill grade and the driver desires to slow the

vehicle by pressing the brake.

Also see Towing a Trailer on page 4-50 for more

information.

Cruise Grade Braking (Allison

Transmission

or Hydra-Matic

6-Speed Automatic Transmission)

Cruise Grade Braking assists when driving on a downhill

grade. It maintains vehicle speed by automatically

implementing a shift schedule that uses the engine and

the transmission to slow the vehicle. Cruise Grade

Braking operates while Cruise Control is engaged in

Tow/Haul mode to assist in maintaining vehicle speed

under loaded vehicle conditions. It utilizes vehicle

acceleration and deviation from desired speed to

determine the correct gear for the operating condition.

If vehicle speed is above the desired speed the

transmission will downshift to slow the vehicle. If vehicle

speed is near or below desired speed the trans will

upshift, allowing vehicle speed to increase.

While in the Range Select Mode (RSM) mode, cruise

grade braking is not available.

See Automatic Transmission Operation on page 2-28.

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