Hummer H2. Manual — part 91

LOCKING HUB CONTROL KNOBS

Locking Hub Control Knobs

LUBRICANTS

See Fluids and Lubricants.

METAL-CLAD SEALS

See Seals.

METALASTIC JOINTS

See Rubber Joints (Metalastic).

MODULATOR PINS

Modulator Pins

MODULATORS

Modulators

Condition

Code

Procedure

Damaged, affecting performance

A

Require replacement.

Missing

C

Require replacement.

Worn, affecting performance

A

Require replacement.

Condition

Code

Procedure

Application incorrect

B

Require replacement.

Missing

C

Require replacement.

Condition

Code

Procedure

Bent, affecting performance

A

Require replacement.

Contaminated (water, fuel, etc.)

A

Require replacement. See note below.

NOTE: Further inspection is required to determine the cause of the contamination

Housing cracked

A

Require replacement.

Inoperative

A

Require replacement. See note below.

NOTE: Inoperative includes intermittent operation or out of OEM specification.

Leaking fluid externally

A

Require repair or replacement.

Leaking fluid internally

A

Require replacement.

Leaking vacuum

A

Require replacement.

Nipple broken

A

Require replacement.

1998 Chevrolet Pickup C1500

Uniform Inspection and Communication Standards DRIVE TRAIN AND TRANSMISSION

MOUNTS (ENGINE, TRANSAXLE, AND TRANSMISSION)

Mounts (Engine, Transaxle, and Transmission)

ODOMETER DRIVES (MECHANICAL)

See Speedometer/Odometer Drives (Mechanical).

ODOMETER HEADS (MECHANICAL)

See Speedometer/Odometer Heads (Mechanical).

OIL PANS

See Transmission Pans.

PANS

See Transmission Pans.

PILOT HOLES

Threads damaged

A

Require repair or replacement.

Threads stripped (threads missing)

A

Require replacement.

Condition

Code

Procedure

Attaching hardware broken

A

Require repair or replacement of

hardware.

Attaching hardware missing

C

Require replacement of hardware.

Attaching hardware not functioning

A

Require repair or replacement of

hardware.

Broken

A

Require replacement.

Leaking (hydraulic mount)

A

Require replacement.

Mounting hole worn, affecting
performance

A

Require replacement.

Mounting hole worn, not affecting
performance

No service suggested or required.

Rubber deteriorated, affecting performance A

Require replacement.

Rubber deteriorated, not affecting
performance

No service suggested or required.

Threads damaged

A

Require repair or replacement.

Threads stripped (threads missing)

A

Require replacement.

1998 Chevrolet Pickup C1500

Uniform Inspection and Communication Standards DRIVE TRAIN AND TRANSMISSION

See Dowel Pins, Guides, and Pilot Holes.

PRESSURE PLATES

Pressure Plates

PRESSURE SWITCHES

See Switches.

RACES

See Bearings and Races.

RUBBER JOINTS (METALASTIC)

These joints may be found on half and/or drive shafts. They are usually found on European vehicles featuring a
three-lug drive flange. They may be equipped with a centering ball or pin.

Rubber Joints (Metalastic)

Condition

Code

Procedure

Balance weight missing

C

Require replacement.

Broken

A

Require replacement.

Contact surface distorted

B

Require replacement.

Cracks

B

Require replacement.

Fingers bent

A

Require replacement.

Hard spots

B

Require replacement.

Scored

B

Require replacement.

Spring rate less than specifications

B

Require replacement.

Worn, affecting performance

A

Require replacement.

Worn beyond specifications

B

Require replacement.

Worn close to the end of its useful life

1

Suggest replacement.

Condition

Code

Procedure

Drive flange bent

A

Require repair or replacement.

Drive flange damaged, affecting performance

A

Require replacement.

Rubber drive joint cracked

2

Suggest replacement.

Rubber drive joint damaged, affecting
performance

A

Require replacement.

Rubber drive joint split between mounting holes

A

Require replacement.

Rubber drive joint torn at mounting holes

A

Require replacement.

Rubber drive joint weather-cracked

No service suggested or

1998 Chevrolet Pickup C1500

Uniform Inspection and Communication Standards DRIVE TRAIN AND TRANSMISSION

SCREENS

See Filters and Screens.

SEALS

Seals

SEALS (METAL-CLAD)

See Seals.

SELECTOR INTERLOCK SYSTEMS

See Shift Interlock Systems (Selector and Key Interlock Systems).

SERVOS

See Actuators (Vacuum).

SHIFT INTERLOCK SYSTEMS (SELECTOR AND KEY INTERLOCK
SYSTEMS)

See: Actuators (Electrical), Cables, Linkages (External), Switches.

SENSORS

Sensors

required.

Condition

Code

Procedure

Leaking

A

Require repair or replacement. See note below.

NOTE: Require inspection of mating and sealing surface and repair or replace as
necessary. Check vent. A plugged vent may force fluid past the seal.

Condition

Code

Procedure

Attaching hardware broken

A

Require repair or replacement of

hardware.

Attaching hardware missing

C

Require replacement of hardware.

Attaching hardware not functioning

A

Require repair or replacement of

hardware.

Connector broken

A

Require repair or replacement.

Connector (Weatherpack type) leaking

A

Require repair or replacement.

1998 Chevrolet Pickup C1500

Uniform Inspection and Communication Standards DRIVE TRAIN AND TRANSMISSION