GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the content theft deterrent (CTD) system check?

--

Go to Step 2

Go to Content Theft Deterrent (CTD) System Check

2

Does the horn operate properly?

--

Go to Step 3

Go to Diagnostic System Check - Horns

3

Test for an open in CKT 28 (BLK).

Is there an open in CKT 28?

--

Go to Step 4

Go to Step 5

4

Repair the open in CKT 28. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Content Theft Deterrent (CTD) System Check

--

5

Inspect for proper terminal contact at the dash integration module (DIM) connector C1 terminal A6.

Is the terminal contact OK?

--

Go to Step 7

Go to Step 6

6

Repair the poor terminal contact. Refer to Connector Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Content Theft Deterrent (CTD) System Check

--

7

Replace the DIM. Refer to Body Control Module Replacement in Body Control systems.

Did you complete the repair?

--

Go to Content Theft Deterrent (CTD) System Check

--