GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value

Yes

No

1

Check the vacuum pump.

Is the vacuum pump unplugged?

--

Go to Step 2

Go to Step 3

2

Plug the vacuum pump into the power source.

Is the vacuum pump plugged into the power source?

--

System OK

--

3

Check the extension cord.

Is the cord working?

--

Go to Step 5

Go to Step 4

4

Replace the extension cord.

Is the replacement complete?

--

System OK

--

5

Check the components.

Are the components faulty?

--

Go to Step 6

System OK

6

Call Tech Assist. 1-800-345-2233

Did you call Tech Assist.?

--

System OK

--