GM 3.1L, 3.4L Index of Articles

Sooner or later your 3.1L GM vehicle's blower motor is gonna'go bad and will need to be replaced. If you've never troubleshooted one, then you've come to the right place... [read more]

OBD II trouble code P0420 Catalyst Efficiency Below Threshold (Bank 1) is one of the most common codes encountered on the GM 3.1L, 3.4L equipped cars and... [read more]

Testing the GM manifold absolute pressure (MAP) sensor on your GM 2.8L, 3.1L, or 3.4L V6 equipped car can be accurately done using only a multimeter and a vacuum pump. This... [read more]

Getting to the bottom of what is causing your GM 3.1L/3.4L car (or mini-van) to crank but not start is not that difficult. In this tutorial/article I'll share some of my... [read more]

This article will help you to diagnose Diagnostic Trouble Codes: P0135, P0141, P0155, P0161 on your GM 2.2L, 2.4L, 3.1L, 3.4L, 3.8L, 4.3L, 5.0L, 5.7L. All of these Trouble... [read more]

If you've had the misfortune of having to replace or are in the process of having to replace the head gaskets on your GM 3.1L or 3.4L equipped GM vehicle, you may be... [read more]

You're gonna' be surprised just how easy it is to diagnose the oxygen sensor (O2 sensor) on your 3.1L, 3.4L OBD II equipped GM Vehicle. Testing them will save you some... [read more]

This is a real life case study that will help you diagnose a hard to find misfire. Although this case study involves a 2000 Chevy Monte Carlo (with a 3.4L V6), you can apply... [read more]

I'm going to show you two different methods to verify if the no-start condition on your 3.1L or 3.4L GM vehicle is due to a lack of fuel, which usually means that the fuel... [read more]

One of the most common problems on the GM 3.1L and 3.4L V6 engines is coolant leaking from the intake manifold gaskets. This problem has been a gold mine for GM and the auto... [read more]