GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Body Control Module (BCM) System Check performed?

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Go to Step 2

Go to Diagnostic System Check - Body Control System

2

  1. Remove the key from the ignition key lock cylinder.
  2. Close all vehicle doors.
  3. While observing the door locks, press once on the LOCK button on the keyless entry transmitter.
  4. While observing the door locks, press twice on the UNLOCK button on the keyless entry transmitter.

Does the keyless entry system operate the door locks?

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Go to Content Theft Deterrent (CTD) System Check

Keyless Entry System Inoperative