Hummer H3. Manual — part 1077

The front propeller shaft transmits rotating force from the transfer case to the front differential
when the transfer case is engaged. The front propeller shaft connects to the transfer case using a
splined slip joint.

One Piece Propeller Shaft Description

A 1 piece propeller shaft uses a splined slip joint to connect the driveline to the transmission or
transfer case.

Two Piece Propeller Shaft Description

There are 3 universal joints used on the two piece propeller shaft, A center bearing assembly is
used to support the propeller shaft connection point and help isolate the vehicle from vibration.

Propeller Shaft Phasing Description

The propeller shaft is designed and built with the yoke lugs (ears) in line with each other. This
produces the smoothest running shaft possible. A propeller shaft designed with built in yoke lugs
in line is known as in - phase. An out of phase propeller shaft often causes vibration. The
propeller shaft generates vibration from speeding up and slowing down each time the universal
joint goes around. The vibration is the same as a person snapping a rope and watching the wave
reaction flow to the end. An in phase propeller shaft is similar to 2 persons snapping a rope at the
same time and watching the waves meet and cancel each other out. A total cancellation of
vibration produces a smooth flow of power in the drive line. All splined shaft slip yokes are
keyed in order to ensure proper phasing.

Universal Joint Description

The universal joint is connected to the propeller shaft. The universal consist of 4 caps with needle
bearings and grease seals mounted on the trunnions of a cross or spider. These bearings and caps
are greased at the factory and no periodic maintenance is required. There are 2 universal joints
used in a one piece propeller shaft and 3 used in two piece propeller shaft. The bearings and caps
are pressed into the yokes and held in place with snap rings, except for 2 bearings on some
models witch are strapped onto the pinion flange of the differential. Universal joints are designed
to handle the effects of various loads and rear axle windup conditions during acceleration and
braking. The universal joint operates efficiently and safely within the designed angle variations.
when the design angles are exceeded, the operational life of the joint decreases.

Center Bearing Description

Center bearings support the driveline when using 2 or more propeller shafts. The center bearing is
a ball bearing mounted in a rubber cushion that attaches to a frame crossmember. The

2007 Hummer H3

2007 Driveline/Axle Propeller Shaft - H3

manufacturer prelubricates and seals the bearing. The cushion allows vertical motion at the
driveline and helps isolate the vehicle from vibration.

SPECIAL TOOLS AND EQUIPMENT

SPECIAL TOOLS

Special Tools

Illustration

Tool Number/Description

J 9522-3

U-Joint Bearing Separator

J 9522-5

U-Joint Bearing Spacer Remover

2007 Hummer H3

2007 Driveline/Axle Propeller Shaft - H3

2006 GENERAL MOTORS

H3

BUZZERS, RELAYS & TIMERS

BUZZERS, RELAYS & TIMERS LOCATION

CIRCUIT PROTECTION DEVICES

Component

Location

A/C Clutch Relay

In underhood fuse block. See Fig. 45 .

A/C COMP Relay

On underhood fuse block.

AIR SOL Relay

In underhood fuse block. See Fig. 45 .

FOG/LP Relay

In underhood fuse block. See Fig. 45 .

Fuel/Pump Relay

In underhood fuse block. See Fig. 45 .

Grille Lamps Relay

Below side air inlet cover.

HDLP Relay

In underhood fuse block. See Fig. 45 .

High Speed Blower Motor Relay

Attached to blower motor case. See

Fig. 27 .

HI/LO BEAM Relay

In underhood fuse block. See Fig. 45 .

HI/LOW WPR Relay

In underhood fuse block. See Fig. 45 .

HORN Relay

In underhood fuse block. See Fig. 45 .

HVAC Relay

In underhood fuse block. See Fig. 45 .

ON/OFF WPR Relay

In underhood fuse block. See Fig. 45 .

PCM CNTRL Relay

In underhood fuse block. See Fig. 45 .

PRK/LP Relay

In underhood fuse block. See Fig. 45 .

PWR/TRN Relay

In underhood fuse block. See Fig. 45 .

RAP/ACCY Relay

In underhood fuse block. See Fig. 45 .

Roof Lamps Relay

Below side air inlet cover.

RR DEFOG Relay

In underhood fuse block. See Fig. 45 .

RUN/CRNK Relay

In underhood fuse block. See Fig. 45 .

SPARE-1 Relay

In underhood fuse block. See Fig. 45 .

SPARE-2 Relay

In underhood fuse block. See Fig. 45 .

2006 Hummer H3

2006 GENERAL MOTORS H3

2006 Hummer H3

2006 GENERAL MOTORS H3

CIRCUIT PROTECTION DEVICES LOCATION

CONTROL UNITS

CONTROL UNITS LOCATION

Component

Location

A/C CLUTCH Relay Diode

In underhood fuse block. See Fig. 45 .

Blower Motor Resistor Assembly

Bottom of blower motor. See Fig. 27 .

Diode (Wiper)

In underhood fuse block. See Fig. 45 .

Seat Circuit Breaker

Under driver seat near C307.

Underhood Fuse Block

Above left front wheel well. See Fig.

17 .

Component

Location

Audio Amplifier

Left rear of passenger compartment.

See Fig. 8 .

Automatic Transmission Floor Shift
Control

Beneath center console.

Body Control Module (BCM)

Behind right front kick panel. See Fig.

10 .

Digital Radio Receiver

Behind right side dash area. See Fig.

8 .

Electronic Brake Control Module
(EBCM)

Left of master cylinder. See Fig. 3 .

Heated Seat Module - Driver

In driver seat bottom.

Heated Seat Module - Passenger

In passenger seat bottom.

HVAC Control Module

Beneath radio. See Fig. 27 .

Inflatable Restraint Passenger Presence
System (PPS) Module

On underside of cushion. See Fig. 37 .

Inflatable Restraint Sensing And
Diagnostic Module (SDM)

Beneath lower console. See Fig. 34 .

Powertrain Control Module (PCM)

At left front side of engine

compartment. See Fig. 17 .

Transfer Case Shift Control Module

Behind glove box. See Fig. 41 .

2006 Hummer H3

2006 GENERAL MOTORS H3