GM 3.8L Index of Articles

In this article, I'll show you how to test the thermostat, to see if it's stuck open or closed, without removing it from the engine. As you might already be aware, when... [read more]

If you suspect that your 3.8L GM vehicle (whether it's a Buick, a Chevy, a Pontiac, or an Olds) has a blown head gasket and don't know how to test this... well, you've found... [read more]

In this tutorial, we'll cover some of the basics you need to know to troubleshoot and diagnose diagnostic trouble codes P0135 and P0141 on your 3.8L equipped GM... [read more]

Testing the camshaft position sensor and/or diagnostic trouble code (DTC) P0341, on your 3.8L V6 equipped GM car or mini-van, is an easy test that can be done using only a... [read more]

If the upstream oxygen sensor has failed, one of the most obvious symptoms besides the check engine light (CEL) being on, is really bad gas mileage. In this article, I'll... [read more]

The 3X-18X crankshaft position (crank) sensor, on the GM 3.8L V6 engine, can easily be tested (to find out if it's bad or not) with a multimeter. With this article, I'll... [read more]

Testing the compression of each cylinder or a specific engine cylinder is becoming a standard test when troubleshooting hard to diagnose misfire conditions on the GM 3.8L... [read more]

A bad fuel injector can cause your 3.8L Buick (or Chevrolet, or Pontiac, or Oldsmobile) to idle rough, miss, and make the check engine light come on (if the vehicle is ODB... [read more]

A fuel injector, on your 3.8L V6 GM vehicle (Buick, Chevrolet, Oldsmobile, Pontiac) can stop working and cause a rough idle and/or misfire condition if it doesn't get power... [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,... [read more] at: