| Subject: | Information on Inverted Knock Sensor -- DTC P0327 Knock Sensor (KS) Circuit Bank 1 or DTC P0332 Knock Sensor (KS) Circuit Bank 2 | 
| Models: | 2005 Buick Terraza | 
 | with 3.5L V-6 Engine (VIN L -- RPO LX9) | 
 
This bulletin is being published to inform technicians of inverted knock sensor DTCs. Knock sensor 1 DTC P0327 will set when knock sensor circuit 2 has malfunctioned and knock sensor 2 DTC P0332 will set when knock sensor circuit 1 malfunctions.  No further
repairs are necessary.
If a knock sensor DTC is set, follow the procedure for the opposite knock sensor DTC in SI.