ignition HUMMER H3 2008 Repair Manual

Ignition Transmission Lock Check
While parked, and with the parking brake set, try to turn
the ignition to LOCK/OFF in each shift lever position.
With an automatic transmission, the ignition
should turn to LOCK/OFF only when the shift lever
is in PARK (P). The ignition key should come
out only in LOCK/OFF.
With a manual transmission, the ignition key should
come out only in LOCK/OFF.
Contact your dealer/retailer if service is required.
Parking Brake and Automatic
Transmission Park (P) Mechanism Check
{CAUTION:
When you are doing this check, your vehicle
could begin to move. You or others could be
injured and property could be damaged. Make
sure there is room in front of your vehicle in
case it begins to roll. Be ready to apply the
regular brake at once should the vehicle begin
to move.Park on a fairly steep hill, with the vehicle facing
downhill. Keeping your foot on the regular brake, set the
parking brake.
To check the parking brake’s holding ability: With
the engine running and transmission in
NEUTRAL (N), slowly remove foot pressure from
the regular brake pedal. Do this until the vehicle is
held by the parking brake only.
To check the PARK (P) mechanism’s holding ability:
With the engine running, shift to PARK (P). Then
release the parking brake followed by the regular
brake.
Contact your dealer/retailer if service is required.
Underbody Flushing Service
At least every spring, use plain water to ush any
corrosive materials from the underbody. Take care to
clean thoroughly any areas where mud and other debris
can collect.
6-11

OnStar®
If your vehicle has OnStar®and you subscribe to
the OnStar®services, please refer to the OnStar®Terms
and Conditions for information on data collection and
use. See alsoOnStar
®System on page 2-48in
this manual for more information.
Navigation System
If your vehicle has a navigation system, use of the
system may result in the storage of destinations,
addresses, telephone numbers, and other trip
information. Refer to the navigation system operating
manual for information on stored data and for deletion
instructions.
Radio Frequency
Identication (RFID)
RFID technology is used in some vehicles for functions
such as tire pressure monitoring and ignition system
security, as well as in connection with conveniences
such as key fobs for remote door locking/unlocking and
starting, and in-vehicle transmitters for garage door
openers. RFID technology in GM vehicles does not use
or record personal information or link with any other
GM system containing personal information.
7-18

H
Hazard Warning Flashers................................... 3-6
Head Restraints............................................... 1-7
Headlamp
Aiming.......................................................5-46
Headlamps....................................................5-49
Bulb Replacement.......................................5-49
Daytime Running Lamps...............................3-17
Exterior Lamps............................................3-15
Flash-to-Pass............................................... 3-9
Halogen Bulbs............................................5-49
High/Low Beam Changer................................ 3-9
On Reminder..............................................3-16
Heated Seats................................................... 1-4
Heater...........................................................3-22
Highbeam On Light.........................................3-39
Highway Hypnosis...........................................4-34
Hill and Mountain Roads..................................4-34
Hood
Checking Things Under................................5-11
Release.....................................................5-11
Horn............................................................... 3-6
How to Wear Safety Belts Properly...................1-16
Hydraulic Clutch.............................................5-26
I
Ignition Positions.............................................2-18
Infants and Young Children, Restraints...............1-33
Ination - Tire Pressure...................................5-62
Instrument Panel
Overview..................................................... 3-4
Instrument Panel (I/P)
Brightness..................................................3-19
Cluster.......................................................3-26
J
Jump Starting.................................................5-42
K
Keyless Entry System....................................... 2-4
Keys............................................................... 2-3
6