GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

Push the rear window WASH button while operating the wipers in the LO position.

The washer fluid sprays the back window until the switch is released. The wiper continues to operate for approximately 3 cycles, then returns to the delay mode.

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2

Push the rear window WASH button while operating the wipers in the HI position.

The washer fluid sprays the back window until the switch is released. The wipers continue to operate.

3

Set the rear window wiper switch in the LO position.

The wiper operates with approximately a 5 second delay between wipe cycles.

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4

Set the rear window wiper switch in the HI position.

The wiper operates at a constant, higher speed.

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* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.