GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

1

Remove the drive belt. Refer to Water Pump and Generator Belt Replacement or Air Conditioning Compressor and Power Steering Pump Belt Replacement . Inspect the drive belt tensioner pulley.

Is the drive belt tensioner pulley loose or misaligned?

Go to Step 4

Go to Step 2

2

Rotate the drive belt tensioner.

Does the tensioner rotate without any unusual resistance or binding?

Go to Step 3

Go to Step 4

3

  1. Use a torque wrench in order to measure the torque required to move the tensioner off of the stop.
  2. Use a torque wrench on a known good tensioner in order to measure the torque required to move the tensioner off of the stop.

Is the first torque reading within 10% of the second torque reading?

System OK

Go to Step 4

4

Replace the drive belt tensioner. Refer to Water Pump and Generator Belt Tensioner Replacement or Air Conditioning Compressor and Power Steering Pump Belt Tensioner Replacement .

Is the repair complete?

System OK

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