GM 3.1L, 3.4L Index of Articles

In this type of Direct Ignition System (DIS), three individual Ignition Coil Packs are mounted right on top of the Ignition Control... [read more] at:

This article will show you how to test and diagnose a bad GM Mass Air Flow (MAF) Sensor on all of the early 90 thru’ mid 90’s... [read more] at:

This article will take you step by step thru’ the testing and troubleshooting of the throttle position sensor on your GM 3.1L or... [read more] at:

In this test tutorial, I'll show you how to test the Mass Air Flow Sensor to see if it's bad (and lighting up the check engine... [read more] at:

This type of EGR valve has made the auto repair industry and GM a ton of money over the years, since it's prone to carbon blockage.... [read more] at:

This is one of the easiest Mass Air Flow Sensors to Test. The following Test is an On Car Test that checks the performance of the... [read more] at:

Testing and troubleshooting an EGR Valve issue or EGR Diagnostic Trouble Code (DTC) on your GM vehicle is not hard to do. In this... [read more] at:

This MAF Sensor is used in all of the different GM Makes: Buick, Chevrolet, Oldsmobile, Pontiac, and of course GMC (you'll find a... [read more] at:

Bench testing the starter is the most effective way to find out if the Starter Motor is in fact bad. This is an easy test that you... [read more] at: