DTC 20. Pontiac GTO 2004

For 1990-2009 cars only

Makes 🢒 Pontiac 🢒 2004 🢒 GTO 🢒 Body 🢒 Body Control System 🢒 DTC 20

Conditions for Setting the DTC

The body control module (BCM) maintains a random access memory (RAM) copy of the electrically erasable programmable read only memory (EEPROM) data. Each of the eight tables is checked periodically to verify the checksum. If the checksum is wrong the DTC is set.

Diagnostic Aids

Clear the DTC. If the DTC resets, remove fuse F29 to reset the BCM.

Step	Action	Yes	No
Schematic Reference: Body Control System Schematics
1	Clear the DTC. If the DTC resets, remove fuse F29 to reset the body control module (BCM). Does the DTC reset?	Go to Step 2	System OK
2	Replace the BCM. Refer to Body Control Module Replacement . Perform the setup procedure for the BCM. Refer to Body Control Module (BCM) Programming/RPO Configuration . Did you complete the replacement?	System OK	--

Step

Action

Yes

Schematic Reference: Body Control System Schematics

Clear the DTC. If the DTC resets, remove fuse F29 to reset the body control module (BCM).

Does the DTC reset?

Go to Step 2

System OK

Replace the BCM. Refer to Body Control Module Replacement .
Perform the setup procedure for the BCM. Refer to Body Control Module (BCM) Programming/RPO Configuration .

Did you complete the replacement?

System OK