GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

IMPORTANT: Ensure all mechanical components are operative and properly mounted before diagnosing the electrical portion of the selectable ride system.

1

  1. Ensure that the SEO IGN fuse is not open.
  2. If the fuse is open, locate and repair the source of the overload.
  3. Replace the fuse.

Is the action complete?

--

Go to Step 2

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2

  1. Inspect the shock ground connections (i.e. ring terminals) for good connections.
  2. Inspect for looseness or damage to the following supply circuits:
  3. • CKT 739 (PNK)
    • CKT 1384 (TAN/WHT)
    • CKT 1750 (BLK)
    • CKT 1550 (BLK)
  4. Inspect for a loose SEO IGN fuse.
  5. Inspect for proper battery voltage. (11.5 to 16 volts)

Is the action complete?

--

Go to Step 3

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3

  1. Inspect the inline connectors for corrosion and proper mating.
  2. Inspect the connector at each shock absorber for proper connection.
  3. Inspect for proper installation of aftermarket electronic equipment which may affect the integrity of other systems. Refer to Troubleshooting Procedures.

Is the action complete?

--

Go to Step 4

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4

  1. Turn the ignition to the ON position.
  2. Depress the ride select switch to the ON (FIRM) position.

Does the ride select switch Indicator turn on?

--

Go to Step 5

Go to Step 6

5

Bounce the front suspension individually at each front corner while switching the selectable ride switch ON and OFF (NORM and FIRM) positions.

Do you feel a change in the damping?

--

Go to Step 6

Go to Ride Does Not Change When Switched (ON - OFF)

6

Bounce the rear suspension individually at each front corner while switching the selectable ride switch ON and OFF (NORM and FIRM) positions.

Do you feel a change in the damping?

--

Go to Step 7

Go to Ride Does Not Change When Switched (ON - OFF)

7

Test drive the vehicle. Activate and de-activate the system while driving, - will be more noticeable over significant ride inputs or in a loaded vehicle condition.

Do you feel a change in the ride performance?

--

System OK

Go to Ride Does Not Change When Switched (ON - OFF)