Hummer H2. Manual — part 2189

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2004 SUSPENSION

Tires and Wheels - Hummer H2

SPECIFICATIONS

FASTENER TIGHTENING SPECIFICATIONS

Fastener Tightening Specifications

DIAGNOSTIC INFORMATION AND PROCEDURES

TIRE DIAGNOSIS - IRREGULAR OR PREMATURE WEAR

Fig. 1: Tire Wear
Courtesy of GENERAL MOTORS CORP.

Callouts For Fig. 1

Inspection Procedure

Application

Specification

Metric

English

Jack Storage Bracket Screw

25 N.m

18 lb ft

Single Wheel Nuts

190 N.m

140 lb ft

Spare Tire Carrier Retaining Bolt

85 N.m

63 lb ft

Spare Tire Retaining Nut

40 N.m

30 lb ft

Callout

Component Name

1

Under-inflation, Hard Cornering, Lack of Regular Rotation

2

Incorrect Wheel Alignment, Hard Cornering, Lack of Regular Rotation

3

Incorrect Wheel Alignment, Shock Absorber Failure

4

Over-inflation, Heavy Acceleration, Lack of Regular Rotation

5

Normal Wear to the Wear Indicator

2004 Hummer H2

2004 SUSPENSION Tires and Wheels - Hummer H2

2004 Hummer H2

2004 SUSPENSION Tires and Wheels - Hummer H2

1. Inspect the front tire wear.

2. Inspect the rear tire wear.

3. Rotate the tires if any of the following conditions exist:

z

The amount of time or mileage since the last tire rotation matches the maintenance schedule.

z

The outer tread blocks are worn more than the middle tread blocks (1).

z

The outer tread blocks are worn more than the inner tread blocks (2).

z

The middle tread blocks are worn more than the outer tread blocks (4).

4. Measure the wheel alignment if any of the following conditions exist:

z

The tread blocks have feathered edges (3).

z

The outer tread blocks are worn more than the inner tread blocks (2).

z

The inner tread blocks are worn more than the outer tread blocks (2).

5. Inspect the struts or the shock absorbers if the tire tread exhibits a cupped appearance (3).

TIRE DIAGNOSIS - WADDLE COMPLAINT

Fig. 2: Identifying Tire Waddle
Courtesy of GENERAL MOTORS CORP.

Tire waddle is a side to side movement at the front of the vehicle and/or the rear of the vehicle. Tire waddle can
be caused by the following conditions:

z

A steel belt not being straight within the tire

z

Excessive lateral runout of the tire

2004 Hummer H2

2004 SUSPENSION Tires and Wheels - Hummer H2

z

Excessive lateral runout of the wheel

The tire waddle is most noticeable at a low speed of about 8-48 km/h (5-30 mph). Tire waddle may appear as
ride roughness at 80-113 km/h (50-70 mph). Tire waddle may appear as a vibration at 80-113 km/h (50-70
mph).

Inspection Procedure

1. Raise and support the vehicle with safety stands. Refer to Lifting and Jacking the Vehicle in General

Information.

2. Perform the following preliminary inspection:

1. Mark the tire with a crayon in order to note the start and the stop position.

2. Rotate each tire and wheel by hand.

3. Inspect the tire for bulges or bent wheels. Replace as necessary.

3. Use tire substitution in order to identify the faulty tire. Perform the following steps for a tire substitution

check:

1. Use a comparable tire in order to replace each tire, one at a time.

2. Test drive the vehicle.

3. If the problem is tire or wheel related, you will eliminate the problem when you remove the faulty

tire from the vehicle.

WHEEL MOUNTING SURFACE CHECK

Replace any wheels that are bent or dented, or have excessive lateral or radial runout. Wheels with runout
greater than specified may cause objectionable vibrations.

CAUTION: Wear gloves when inspecting the tires in order to prevent personal

injury from steel belts sticking through the tire.

2004 Hummer H2

2004 SUSPENSION Tires and Wheels - Hummer H2