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.
The following table illustrates the ECM connector locations:
| ECM Connector Location | |
|---|---|
| X2 | X1 |
| Front of Vehicle | |
- If the vehicle has sat overnight, the IAT sensor and the ECT sensor values should display within 3°C (5°F).
- High resistance on either the IAT sensor signal circuit or the IAT sensor low reference circuit could set a DTC.