LaCrosse V6-3.6L (2007)
Prior to performing any diagnostics, identify which vehicle communication system is found in the vehicle using the table.
GM LAN sets SDM DTC B0081 with symptom DTC 71 and flash DTC 034 or 056.
Class 2 sets SDM DTC B0092 with NO symptom DTC and flash DTC 034 or 056.
Finding Flash DTCs
Verify that DTC B0081 with symptom DTC 71 (on vehicles with LAN) OR DTC B0092 with no symptom DTC (on vehicles with Class 2) is present.
If the DTC is present, turn ignition ON with the engine OFF. Using the scan tool, go to the passenger presence system (PPS) menu, then retrieve the
DTCs. Refer to DTC B0081 or B0092 in SI.
If the PPS has any current or history DTCs stored, you must address the PPS DTCs first. Refer to the Diagnostic Trouble Code (DTC) List - Vehicle in
SI.
PPS flash DTCs are listed at the very end (bottom) of the entire DTC list in SI.
Check for flash DTCs. If DTC 034 or 056 are present, refer to procedures below.
Flash DTC 034
Turn the ignition ON with the engine OFF. Use the scan tool to clear all SIR and PPS DTCs. Refer to DTC B0081 or B0092 in SI.
Rezero the PPS. Refer to Passenger Presence System Rezeroing in SI.
Check for DTC 034.
If flash DTC 034 is set:
Remove the cushion cover. Allow the cushion to dry for 48 hours (use a fan to assist in the drying process). Refer to Front Seat Cushion Cover
Replacement in SI.
After the cushion has dried, clear the DTC.
Use the Tech 2(R) scan tool to re-check for codes.
If the code does not return, the issue has been corrected. DO NOT replace the cushion and module.
If replacement of the PPS cushion sensor and module assembly is required, these parts will be sent in a set (cushion and module) and must be replaced as
a set, since they are calibrated at the manufacturer as a set.
ONLY replace the PPS cushion and module assembly if the DTC returns after the cushion is thoroughly dry.
Flash DTC 056
Turn the ignition ON with the engine OFF. Use the scan tool to clear all SIR and PPS DTCs. Refer to DTC B0081 or B0092 in SI.
