Diagnostic Aids

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

A history DTC maybe caused by an intermittent condition. Refer to Testing for Intermittent Conditions and Poor Connections .
There are different fuse blocks and different relays between the LS4 (V8) engine and the L26/L32 (V6) engines. Be sure to use the correct references and diagnostic tests listed below.