Hummer H3. Manual — part 1062

1

Did you perform the Diagnostic System
Check - Vehicle?

Go to Step 2

Go to
Diagnostic
System Check -
Vehicle

2

Verify that the power door locks are
inoperative.
Do the power door locks operate
normally?

Go to Testing
for Intermittent
Conditions and
Poor
Connections

Go to Step 3

3

Are the power door locks and the driver
power window inoperative?

Go to Step 7

Go to Step 4

4

Are the power door locks inoperative from
a single door lock switch?

Go to Step 5

Go to Step 6

5

Is the driver door lock switch the
inoperative switch?

Go to Step 8

Go to Step 9

6

Is the driver door lock actuator the
inoperative actuator?

Go to Step 10

Go to Step 11

7

Test the battery positive voltage circuit of
the drivers switch assembly for a short to
ground or an open. Refer to Circuit
Testing and Wiring Repairs .
Did you find and correct the condition?

Go to Step 21

Go to Step 8

8

Test the ground circuit of the drivers
switch assembly for an open. Refer to
Circuit Testing and Wiring Repairs .
Did you find and correct the condition?

Go to Step 21

Go to Step 13

9

Test the passenger door lock switch
control circuits for an open. Refer to
Circuit Testing and Wiring Repairs .
Did you find and correct the condition?

Go to Step 21

Go to Step 12

10

Test the driver door lock actuator unlock
control circuit for an open. Refer to
Circuit Testing and Wiring Repairs .
Did you find and correct the condition?

Go to Step 21

Go to Step 14

11

Test the door lock actuator control circuits
for an open. Refer to Circuit Testing and
Wiring Repairs .
Did you find and correct the condition?

Go to Step 21

Go to Step 15

2007 Hummer H3

2007 ACCESSORIES & EQUIPMENT Vehicle Access - H3

12

Test the passenger door lock switch ground
circuit for an open. Refer to Circuit
Testing and Wiring Repairs .
Did you find and correct the condition?

Go to Step 21

Go to Step 16

13

Inspect for poor connections at the harness
connector of the drivers switch assembly.
Refer to Testing for Intermittent
Conditions and Poor Connections and
Connector Repairs .
Did you find and correct the condition?

Go to Step 21

Go to Step 17

14

Inspect for poor connections at the harness
connector of the driver door lock actuator.
Refer to Testing for Intermittent
Conditions and Poor Connections and
Connector Repairs .
Did you find and correct the condition?

Go to Step 21

Go to Step 18

15

Inspect for poor connections at the harness
connector of the appropriate passenger
door lock actuator. Refer to Testing for
Intermittent Conditions and Poor
Connections and Connector Repairs .
Did you find and correct the condition?

Go to Step 21

Go to Step 19

16

Inspect for poor connections at the harness
connector of the passenger door lock
switch. Refer to Testing for Intermittent
Conditions and Poor Connections and
Connector Repairs .
Did you find and correct the condition?

Go to Step 21

Go to Step 20

17

Replace the driver switch assembly. Refer
to Door Lock and Side Window Switch
Replacement - Driver Side (1st Design)
or Door Lock and Side Window Switch
Replacement - Driver Side (2nd
Design).
Did you complete the repair?

Go to Step 21

-

18

Replace the driver door lock actuator.
Refer to Front Side Door Lock
Replacement.

2007 Hummer H3

2007 ACCESSORIES & EQUIPMENT Vehicle Access - H3

REPAIR INSTRUCTIONS

LOCK CYLINDER BINDING

In many cases, applying the proper lubrication can correct the following conditions:

Binding or sticking door lock cylinders

Difficulty in inserting and removing the keys

For lubricating the above components, use lubricant GM P/N 12346241 or equivalent

Do not use penetrating lubricants such as GM P/N 1052949 or WD-40®. Penetrating lubricants
wash out the original lubrication. Penetrating lubricants eventually evaporate, leaving little or no
lubricating material. However, when using penetrating lubricants in order to thaw or in order to
loosen the lock cylinder components, refer to steps 2-4 in the procedure below for the proper
methods of lubrication.

Repair lock cylinders frozen in cold weather by using the following procedure:

1. While carefully avoiding damage to the painted surfaces, apply heat to the cylinder with a

heat gun.

2. Using a paper clip or a similar item, hold the door shutter open.

Force air into the cylinders using compressed air through a blow gun attachment.

3. While holding the shutter door open, inject small amounts of a recommended lubricant into

Did you complete the repair?

Go to Step 21

-

19

Replace the appropriate passenger door
lock actuator. Refer to Front Side Door
Lock Replacement or Rear Door Lock
Replacement.
Did you complete the repair?

Go to Step 21

-

20

Replace the passenger door lock switch.
Refer to Door Lock and Side Window
Switch Replacement - Passenger Side.
Did you complete the repair?

Go to Step 21

-

21

Operate the system in order to verify the
repair.
Did you find and correct the condition?

System OK

Go to Step 2

2007 Hummer H3

2007 ACCESSORIES & EQUIPMENT Vehicle Access - H3

the cylinder.

4. Work the key into the cylinder repeatedly.

Wipe away any excess lubrication from the key.

DOOR LOCK CYLINDER REPLACEMENT

Fig. 16: Lock Cylinder Replacement - Door
Courtesy of GENERAL MOTORS CORP.

Door Lock Cylinder Replacement

Callout

Component Name

Fastener Tightening Specifications: Refer to Fastener Tightening Specifications .

Preliminary Procedures

1. Remove the interior trim panel. Refer to Front Side Door Trim Panel

Replacement .

2. Remove the water deflector. Refer to Front Side Door Water Deflector

Replacement .

3. Remove the outside door handle. Refer to Front Side Door Outside Handle

Replacement.

NOTE:

Refer to Fastener Notice .

2007 Hummer H3

2007 ACCESSORIES & EQUIPMENT Vehicle Access - H3