GM 3.8L Index of Articles

In this tutorial I'll explain what a P0108: MAP Sensor Circuit High Voltage trouble code means. I'll also talk about some of the tests you can perform to find its cause and... [read more]

A trouble code P0107: MAP Sensor Circuit Low Voltage is probably one of the most common MAP sensor trouble codes that'll pop up and illuminate the check engine light. In... [read more]

NOTE: See vehicle application below: This simplified alternator circuit wiring diagram applies to the following vehicles: 1996, 1997 3.8L Buick LeSabre.... [read more]

The manifold absolute pressure (MAP) sensor is not a hard component to test. It can easily be tested with a multimeter -no scan tool required. Why test it? To make sure... [read more]

NOTE: See vehicle application below: This simplified blower motor circuit wiring diagram applies to the following vehicles with automatic A/C controls:... [read more]

A trouble code P0123: Throttle Position Sensor Circuit High Voltage is a very common trouble code that is generally caused by a bad throttle position sensor (TPS). In... [read more]

NOTE: See vehicle application below: This simplified starter motor circuit wiring diagram applies to the following vehicles: 1996, 1997, 1998 3.8L Buick... [read more]

A trouble code P0121: Throttle Position Sensor Performance Problem lets you know that there's a malfunction with the throttle position sensor. In this tutorial I'll... [read more]

NOTE: See vehicle application below: This simplified ignition system wiring diagram applies to the following vehicles: 1996, 1997 3.8L Buick... [read more]

NOTE: See vehicle application below: This simplified ignition system wiring diagram applies to the following vehicles: 1998 3.8L Buick LeSabre. 1998... [read more]