GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Garage Door Opener System Check performed?

--

Go to Step 2

Go to Garage Door Opener System Check

2

Check courtesy fuse 3 at the I/P fuse block.

Is the fuse functional?

--

Go to Step 4

Go to Step  3

3

Locate source of overload and replace courtesy fuse 3 at the I/P fuse block.

Is the repair complete?

--

Go to Garage Door Opener System Check

--

4

  1. Remove the garage door opener module. Refer to Garage Door Opener Module Replacement .
  2. Disconnect and check C1 and C2 for loose and/or improperly seated terminals.
  3. Reconnect C1 and C2 and check for proper retention of locking tab.

Does C1 and/or C2 have loose, improperly seated terminals or poor retention of the locking tab?

--

Go to Step 5

Go to Step  6

5

  1. Repair the damaged terminal(s) as necessary. Refer to Wiring Repairs in Wiring Systems.
  2. Repair or replace connector as necessary.

Is the repair complete?

--

Go to Garage Door Opener System Check

--

6

  1. Disconnect connector C2.
  2. Check for continuity on CKT 40 (ORN) from console to I/P fuse block.

Is there continuity?

--

Go to Step 8

Go to Step 7

7

Locate and repair open in CKT 40 (ORN) between console and I/P fuse block.

Is the repair complete?

--

Go to Garage Door Opener System Check

--

8

  1. Disconnect connector C1.
  2. Check continuity on CKT 1382 (PPL/WHT) from the console to I/P.

Is there continuity?

--

Go to Step 10

Go to Step 9

9

Locate and repair open in CKT 1382 (PPL/WHT) between console and I/P.

Is the repair complete?

--

Go to Garage Door Opener System Check

--

10

Check continuity on CKT 1350 (BLK) from console to G400.

Is the wire functional?

--

Go to Step 12

Go to Step 11

11

Locate and repair open in CKT 1350 (BLK) between console and G400.

Is the repair complete?

--

Go to Garage Door Opener System Check

--

12

Replace the Garage Door Opener module. Refer to Garage Door Opener Module Replacement .

Is the repair complete?

--

Go to Garage Door Opener System Check

--