2007 HUMMER H3 hood release

Q:Am I likely to stall when going downhill?
A:It is much more likely to happen going uphill.
But if it happens going downhill, here is
what to do:
1. Stop your vehicle by applying the regular
brakes. Apply the parking brake.
2. If you have an automatic transmission,
shift to PARK (P). While still braking,
restart the engine.
3. Shift back to a low gear, release the
parking brake, and drive straight down.
4. If the engine will not start, get out and
get help.
Driving Across an Incline
Sooner or later, an off-road trail will probably go
across the incline of a hill. If this happens,
you have to decide whether to try to drive across
the incline. Here are some things to consider:
A hill that can be driven straight up or down
may be too steep to drive across. When you
go straight up or down a hill, the length of the
wheel base — the distance from the front
wheels to the rear wheels — reduces the
likelihood the vehicle will tumble end over end.
But when you drive across an incline, the much
more narrow track width — the distance
between the left and right wheels — may not
prevent the vehicle from tilting and rolling over.
Also, driving across an incline puts more weight
on the downhill wheels. This could cause a
downhill slide or a rollover.
266

Service........................................................ 314
Accessories and Modications................... 314
California Proposition 65 Warning.............. 315
Doing Your Own Service Work.................. 315
Adding Equipment to the Outside
of Your Vehicle...................................... 316
Fuel............................................................. 316
Gasoline Octane........................................ 316
Gasoline Specications.............................. 316
California Fuel........................................... 316
Additives................................................... 317
Fuels in Foreign Countries........................ 318
Filling the Tank......................................... 318
Filling a Portable Fuel Container............... 320
Checking Things Under the Hood.............. 321
Hood Release........................................... 321
Engine Compartment Overview.................. 322
Engine Oil................................................. 323Engine Oil Life System.............................. 326
Engine Air Cleaner/Filter............................ 328
Automatic Transmission Fluid.................... 329
Manual Transmission Fluid........................ 332
Hydraulic Clutch........................................ 334
Engine Coolant.......................................... 335
Radiator Pressure Cap.............................. 338
Engine Overheating................................... 338
Cooling System......................................... 340
Engine Fan Noise..................................... 345
Power Steering Fluid ................................. 345
Windshield Washer Fluid........................... 346
Brakes...................................................... 347
Battery...................................................... 351
Jump Starting............................................ 352
Rear Axle.................................................... 357
Four-Wheel Drive........................................ 358
Front Axle................................................... 358
Section 5 Service and Appearance Care
311

Checking Things Under
the Hood
{CAUTION:
An electric fan under the hood can start up
and injure you even when the engine is not
running. Keep hands, clothing, and tools
away from any underhood electric fan.
{CAUTION:
Things that burn can get on hot engine
parts and start a re. These include
liquids like fuel, oil, coolant, brake uid,
windshield washer and other uids, and
plastic or rubber. You or others could be
burned. Be careful not to drop or spill
things that will burn onto a hot engine.
Hood Release
To open the hood, do the following:
1. Pull the handle
with this symbol
on it. It is located
inside the vehicle
on the lower
left side of the
instrument panel.
2. Release the secondary latch on the hood.
It is located below the front center of
the hood.
3. Lift the hood.
Before closing the hood, be sure all the ller caps
are on properly. Then pull the hood down and
close it rmly.
321

The vehicle should be properly prepared as follows:
The vehicle should be placed so the headlamps
are 25 ft. (7.6 m) from a light colored wall or
other at surface.
The vehicle must have all four tires on a level
surface which is level all the way to the wall or
other at surface.
The vehicle should be placed so it is
perpendicular to the wall or other at surface.
The vehicle should not have any snow, ice, or
mud on it.
The vehicle should be fully assembled and all
other work stopped while headlamp aiming is
being performed.
The vehicle should be normally loaded with a
full tank of fuel and one person or 160 lbs
(75 kg) sitting on the driver’s seat.
Tires should be properly inated.
The spare tire is in its original location in
the vehicle.To adjust the vertical aim, do the following:
1. Open the hood. SeeHood Release on
page 321for more information.
2. Find the aim dot on the lens of the headlamp.
3. Measure the distance from the ground to
the aim dot on the headlamp. Record the
distance.
359

Headlamps
To replace a headlamp bulb, do the following:
1. Open the hood. SeeHood Release on
page 321for more information.
2. Reach in and access the headlamp bulb
socket from inside the engine compartment.
3. Turn the bulb socket counterclockwise to
remove it from the headlamp assembly
and pull it straight out.4. Unplug the electrical connector by pushing
the release tab and pulling the bulb
socket out.
5. Replace with a new bulb socket.
6. Reinstall the electrical connector.
7. Reinstall the new bulb socket into the
headlamp assembly and turn it clockwise
to secure.
8. Close the hood.
362

(c)Visually inspect hoses and have them replaced
if they are cracked, swollen, or deteriorated.
Inspect all pipes, ttings, and clamps; replace with
genuine GM parts as needed. To help ensure
proper operation, a pressure test of the cooling
system and pressure cap and cleaning the outside
of the radiator and air conditioning condenser is
recommended at least once a year.
(d)Visually inspect wiper blades for wear or
cracking. Replace wiper blades that appear worn
or damaged or that streak or miss areas of
the windshield.
(e)Make sure the safety belt reminder light and all
your belts, buckles, latch plates, retractors, and
anchorages are working properly. Look for any
other loose or damaged safety belt system parts.
If you see anything that might keep a safety belt
system from doing its job, have it repaired. Have
any torn or frayed safety belts replaced. Also look
for any opened or broken airbag coverings, and
have them repaired or replaced. The airbag system
does not need regular maintenance.(f)Lubricate all key lock cylinders, hood latch
assembly, secondary latch, pivots, spring anchor,
release pawl, rear compartment hinges, outer
swing-gate handle pivot points, rear door detent
link, roller mechanism, swing-gate handle
pivot points, latch bolt, fuel door hinge, locks, and
folding seat hardware. More frequent lubrication
may be required when exposed to a corrosive
environment. Applying silicone grease on
weatherstrips with a clean cloth will make them
last longer, seal better, and not stick or squeak.
(g)Check vent hose at transfer case for kinks and
proper installation.
(h)Change automatic transmission uid and lter
if the vehicle is mainly driven under one or
more of these conditions:
In heavy city traffic where the outside
temperature regularly reaches 90°F (32°C)
or higher.
In hilly or mountainous terrain.
When doing frequent trailer towing.
Uses such as found in taxi, police, or
delivery service.
434

Fuel............................................................ 316
Additives.................................................. 317
California Fuel.......................................... 316
Filling a Portable Fuel Container.............. 320
Filling Your Tank...................................... 318
Fuels in Foreign Countries....................... 318
Gage....................................................... 191
Gasoline Octane...................................... 316
Gasoline Specications............................ 316
Fuses
Engine Compartment Fuse Block............. 418
Fuses and Circuit Breakers...................... 417
Windshield Wiper..................................... 417
G
Gage
Engine Coolant Temperature.................... 185
Fuel......................................................... 191
Speedometer........................................... 176
Tachometer.............................................. 176
Garage Door Opener..........................132, 133
Gasoline
Octane..................................................... 316
Specications........................................... 316Glove Box................................................... 143
GM Mobility Reimbursement Program.......... 453
H
Hazard Warning Flashers............................ 154
Head Restraints............................................ 13
Headlamp
Aiming..................................................... 358
Headlamps.................................................. 362
Automatic Headlamp System.................... 165
Bulb Replacement.................................... 361
Daytime Running Lamps.......................... 164
Flash-to-Pass........................................... 157
Halogen Bulbs......................................... 361
High/Low Beam Changer ......................... 157
On Reminder........................................... 164
Heated Seats................................................ 10
Heater......................................................... 170
Highbeam On Light..................................... 190
Highway Hypnosis....................................... 279
Hill and Mountain Roads............................. 279
Hood
Checking Things Under............................ 321
Release................................................... 321
472