Hummer H3. Manual — part 1640

DESCRIPTION AND OPERATION

SUNROOF DESCRIPTION AND OPERATION

The power sunroof is controlled by the sunroof switch through the open and close motor control
circuits. Ignition voltage is supplied to the sunroof switch through the retained accessory power
(RAP) relay and the sunroof 20A fuse in the underhood BEC. While the sunroof switch is in an
inactive state both switch contacts are closed to the sunroof switch ground circuit. When an open
or close button is pressed on the sunroof switch, its switch contact is closed to the voltage supply
circuit. The motor is bi-directional and the direction of motor rotation is determined by which of
the motor control circuits is switched to positive voltage while the other remains grounded.

1

2. Open the sunroof window.

3. Screws are located on the inside edge of each corner of the window.

Tighten: 4 N.m (35 lb in)

2

Window, Sunroof
Tip: Remove the window from the outside the vehicle.

2007 Hummer H3

2007 ACCESSORIES & EQUIPMENT Sunroof - H3

2007 TRANSMISSION

Transfer Case - BW 4493/4494 - H3

SPECIFICATIONS

APPROXIMATE FLUID CAPACITIES

Approximate Fluid Capacities

FASTENER TIGHTENING SPECIFICATIONS

Fastener Tightening Specifications

Application

Specification

Metric

English

Manual Transmission Fluid GM P/N 88861800
(Canadian P/N 88861801)

1.5 liters

1.6 quarts

Application

Specification

Metric

English

Adapter Studs

14 N.m

10 lb ft

Case Bolts

25 N.m

18 lb ft

Drain Plug

16 N.m

12 lb ft

Encoder Motor Bolts

10 N.m

89 lb in

Encoder Motor Bracket Bolt

10 N.m

89 lb in

Encoder Motor Support Bracket Nuts

5 N.m

44 lb in

Fill Plug

16 N.m

12 lb ft

Front Drive Shaft Universal Joint Clamp Bolts

20 N.m

15 lb ft

Front Output Shaft Flange Nut

319 N.m

235 lb ft

Transfer Case Shield Bolts

30 N.m

23 lb ft

Transfer Case to Transmission Nuts

50 N.m

37 lb ft

Transmission Crossmember to Frame Bracket -
Horizontal - Bolts and Nuts

50 N.m

37 lb ft

Transmission Crossmember to Frame - Vertical -
Bolts

100 N.m

74 lb ft

Transmission Mount to Support Nuts

57 N.m

42 lb ft

Vehicle Speed Sensor

17 N.m

13 lb ft

Vent

6 N.m

53 lb in

2007 Hummer H3

2007 TRANSMISSION Transfer Case - BW 4493/4494 - H3

2007 Hummer H3

2007 TRANSMISSION Transfer Case - BW 4493/4494 - H3

SEALERS, ADHESIVES AND LUBRICANTS

Sealers, Adhesives and Lubricants

SCHEMATIC AND ROUTING DIAGRAMS

TRANSFER CASE CONTROL SCHEMATICS

Application

Type of Material

GM Part Number

United States

Canada

Drain Plug

Pipe Sealant

12346004

10953480

Fill Plug

Pipe Sealant

12346004

10953480

Rear Case Half to Front Case Half

RTV Sealant

12345739

10953541

Transfer Case Fluid

Manual Transmission

Fluid

88861800

88861801

Vehicle Speed Sensor O-Ring

Manual Transmission

Fluid

88861800

88861801

Vent

Pipe Sealant

12346004

10953480

2007 Hummer H3

2007 TRANSMISSION Transfer Case - BW 4493/4494 - H3

Fig. 1: Power, Ground, Serial Data, Indicator, VSS & Encoder Motor Schematic
Courtesy of GENERAL MOTORS CORP.

Fig. 2: Shift Control Switch Inputs Schematic
Courtesy of GENERAL MOTORS CORP.

COMPONENT LOCATOR

TRANSFER CASE CONTROL COMPONENT VIEWS

2007 Hummer H3

2007 TRANSMISSION Transfer Case - BW 4493/4494 - H3