Hummer H2. Manual - part 225

The OnStar(R) speech recognition systems use speech technology that is designed to understand a wide range 
of American English speakers. Although there is no one right way to speak English, the system will work best 
when users try to modify their pronunciation should they encounter difficulty. Users who do not obtain good 
results are advised to try the tips and workarounds found in this section. 

General Tips for Better Speech Recognition 

Concern

Tip for Better Result

Noise

Noise may confuse the speech recognition system. You usually get better performance 
from the system in quieter conditions: 

z

The HVAC fan creates noise. Turn it down or off for better speech system 
performance.  

z

Driving at high speeds creates louder engine noise and wind noise. You may get 
better results at lower speeds.  

z

An open window or an open sunroof allows more noise to enter the vehicle. Close 
all windows for better results.  

z

Noisy rainstorms can also reduce performance.  

z

If passengers are talking while you use the speech system, it may be confused by 
their speech. You will get better results if all occupants of the vehicle are quiet 
while the system is listening for commands.  

When to Speak In Personal Calling, the system is only listening after it prompts you to speak. 

z

When the system prompts you to speak, you have about 5 seconds to respond. If 
the system does not hear a response, it will prompt you again, or cancel the 
transaction.  

z

If you begin to speak too soon, it will tell you "Slower, please." Try pausing for a 
half second before speaking.  

z

In the Virtual Advisor, the system is always listening for commands, even while it 
is speaking.  

How to Speak

Speak forcefully, and clearly. 

z

The noisier the environment, the louder you need to speak. If you are in the driver 
seat, speak facing the front of the car. If you are a passenger, speak facing the 
rearview mirror.  

z

Speak calmly, and naturally. The system may sometimes fail your repeated 
attempts to give a command. If your speech is distorted by shouting or frustration, 
this may cause more errors.  

z

People with high-pitched voices may have better results by speaking in a deeper, 
lower-pitched voice. However, do not lower the volume of the voice.  

z

Avoid speaking with a rising intonation, like asking a question. Use a flat or 
falling intonation, like giving an answer.  

What to Say

Personal Calling: One-word commands 

z

The Personal Calling system listens for only one word at a time. There are some 

 

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2004 ACCESSORIES & EQUIPMENT Cellular Communication - Hummer H2

  

Personal Calling Commands 

exceptions, 2-word phrases that are spoken and understood as a single word, e.g. 
'virtual advisor', 'voice feedback', and 'my number'. You can enter phone numbers 
only one digit at a time, and the system repeats each digit as it hears it.  

z

Say "Help" at the Ready prompt to hear the list of Personal Calling commands.  

z

Virtual Advisor can understand sentences with more than one word. It also 
expects to hear a 4-digit number all at once when it asks for your PIN.  

z

Say, "What are my choices?" to hear a list of commands that the Virtual Advisor 
understands.  

Entering a 
phone number

z

If you have trouble getting numbers correctly into the system, store your 
frequently-called number in the directory, so the system will remember them. 
After you have stored a number with a nametag, then you simply say 'call' and the 
nametag in order to call the number.  

z

If the system cannot understand your numbers, ask another person to help you 
enter your frequently-called numbers. This person can speak the numbers, then 
you can speak the nametag.  

Storing or 
dialing a 
number

When you have finished speaking your phone number, you do not need to say 'store' or 
'dial' to indicate that you are done. If you pause and say nothing, the system will ask you 
if you want to store or dial. Say 'yes'.

Creating 
nametags

z

Short nametags that are similar may be easily confused by the system. You may 
get better recognition of your nametags if you make them longer, for example 
'George Washington' without pause, instead of 'George' only.  

z

If you want to use nametags while driving, it is best to store the nametag with 
some vehicle noise in the background. If you are in park while you are storing 
nametags, you can turn the fan on low or open windows in order to create some 
background noise.  

Virtual 
Advisor 4-digit 
PIN

Say the four digits in a natural way, without pausing between digits.

Interrupting

z

When the Virtual Advisor is speaking, you can interrupt it with another command. 
The first word in your command helps to get its attention.  

z

If the Virtual Advisor has trouble understanding your commands when you 
interrupt, try speaking the first word loudly and clearly, then pause for an instant, 
then continue with the rest of the command. For example: "Get. my weather" or 
"Lookup. a quote for General Motors".  

Command

Tip for Better Result

'add'

Emphasize the 'd' at the end of the word.

'call'

Emphasize the 'l' at the end of the word.

'cancel'

Emphasize the 'l' at the end of the word. If you are speaking the 'can' syllable very quickly, 
try to lengthen it a little.

'clear'

Emphasize the 'r' at the end of the word.

'delete'

Emphasize the 't' at the end of the word. Do not swallow the 'd' at the start of the word.

 

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'dial'

Emphasize the 'l' at the end of the word.

'digit dial' 
(Gen 6)

Combine the words smoothly and emphasize each syllable.

'directory'

Speak all 4 syllables clearly. Do not swallow the last part of the word.

'help'

Emphasize the 'h' sound at the start of the word. Emphasize the 'p' sound at the end of the 
word.

'my number' Emphasize all 3 syllables.
'no'

Speak loudly and slowly. Emphasize the 'n' sound at the start of the word. Draw out the 'o' 
sound at the end of the word.

'redial'

Try to emphasize and lengthen the first syllable: reee-dial

'security'

Speak 4 syllables clearly. Do not swallow the 'i' sound in the middle of the word.

'store'

Emphasize the 'o' sound in the middle of the word in order to distinguish from 'star'. 
Emphasize the 'st' sound at the start of the word in order to distinguish from 'four'.

'units'

Speak loudly and clearly.

'verify'

Speak 3 syllables clearly. Do not swallow the 'i' sound in the middle of the word.

'Virtual 
Advisor'

Emphasize both words.

'voice 
feedback'

Emphasize both words.

'yes'

Emphasize the 'y' sound at the start of the word. Emphasize the 's' sound at the end of the 
word.

'zero', 'oh'

If the system does not understand 'oh', try 'zero', or vice versa.

'one'

Emphasize the 'n' at the end of the word.

'two'

Round your lips for the 'ooo' part of the word. If you are clipping the 'ooo' very short, try to 
lengthen it, but do not draw it out excessively. Speak in a low pitch. Do not use a rising 
tone like asking a question; a falling tone like giving an answer is better.

'three'

End the word 'three' in a smile, to draw back your lips. Lengthen the 'eee' sound if you are 
clipping it very short.

'four'

Emphasize the 'r' at the end of the word.

'five'

Emphasize the 'v' sound.

'six'

Emphasize the 'ks' sound at the end of the word.

'seven'

Emphasize the 'n' at the end of the word. Lengthen the 'sev' syllable.

'eight'

Emphasize the 't' at the end of the word. Lengthen the 'eee' sound at the start of the word.

'nine'

Emphasize the 'n' sounds to distinguish from 'five'.

'star'

Emphasize the 'r' at the end of the word. Emphasize the 'ah' sound in order to distinguish 
from 'store'.

'pound'

Emphasize the 'p' at the start of the word. Emphasize the 'd' at the end of the word.

 

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2004 ACCESSORIES & EQUIPMENT

Cruise Control - Hummer H2 

SCHEMATIC AND ROUTING DIAGRAMS 

CRUISE CONTROL SCHEMATICS 

Fig. 1: Cruise Control Diagrams 
Courtesy of GENERAL MOTORS CORP. 

COMPONENT LOCATOR 

CRUISE CONTROL COMPONENT VIEWS 

 

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2004 ACCESSORIES & EQUIPMENT Cruise Control - Hummer H2