GM 4.8L, 5.3L, 6.0L Index of Articles

P0135, P0155 -Upstream O2 Sensor Test (1999-2002 GM 4.8L, 5.3L, 6.0L)

P0135, P0155 -Upstream O2 Sensor Test (1999-2002 GM 4.8L, 5.3L, 6.0L)

This tutorial will help you to test diagnostic trouble codes P0135 and P0155 on specific Chevy and GMC Pickups, Vans, and SUVs with either a 4.8L, 5.3L, or 6.0L V8. To see if this test tutorial is the one you need for your specific GM vehicle,...   read more >>

P0135, P0155 -Upstream O2 Sensor Test (2003-2005 GM 4.8L, 5.3L, 6.0L)

P0135, P0155 -Upstream O2 Sensor Test (2003-2005 GM 4.8L, 5.3L, 6.0L)

This tutorial will help you to test diagnostic trouble codes P0135 and P0155 on specific 2003, 2004, and 2005 Chevy and GMC Pickups, Vans, and SUVs with either a 4.8L, 5.3L, or 6.0L V8. If you're wondering if this tutorial applies to your...   read more >>

BAD Fan Clutch Troubleshooting Case Study (GM 4.8L, 5.3L, 6.0L)

BAD Fan Clutch Troubleshooting Case Study (GM 4.8L, 5.3L, 6.0L)

This case study will help you to test a thermal fan clutch on any GM vehicle equipped with one. Believe it or not, there's a specific and logical diagnostic strategy to diagnose a BAD fan clutch (that's causing your vehicle to overheat). Now,...   read more >>

P0135, P0155 -Upstream O2 Sensor Test (2006-2009 GM 4.8L, 5.3L, 6.0L)

P0135, P0155 -Upstream O2 Sensor Test (2006-2009 GM 4.8L, 5.3L, 6.0L)

With the help from this tutorial, you be able to test the oxygen sensor to see if its heater element is really fried, and thus causing the P0135 or P0155 to light up your check engine light. In case this tutorial doesn't cover your specific...   read more >>

How to Test the Intake Air Temp (IAT) Sensor (GM 4.8L, 5.3L, 6.0L)

How to Test the Intake Air Temp (IAT) Sensor (GM 4.8L, 5.3L, 6.0L)

Testing the intake air temperature (IAT) sensor, which is located inside the mass air flow (MAF) sensor, can easily be done with a scan tool and/or a multimeter. In this article, I'll show you how to test IAT sensor in a step-by-step way that...   read more >>

P0141, P0161 Downstream O2 Sensor Test (1999-2002 GM 4.8L, 5.3L, 6.0L)

P0141, P0161 Downstream O2 Sensor Test (1999-2002 GM 4.8L, 5.3L, 6.0L)

This tutorial will help you test the downstream oxygen sensor's on your 4.8L, 5.3L, or 6.0L Chevy or GMC Pickup or SUV. If this tutorial doesn't cover your specific vehicle, take a look at the index of tutorials here: O2 Sensor Tutorial...   read more >>

Testing P0135, P0141, P0155, P0161 O2 Heater Performance Problem

Testing P0135, P0141, P0155, P0161 O2 Heater Performance Problem

Troubleshooting DTCs P0135, P0141, P0155, P0161 is not hard and in this tutorial, we'll look at some of the basics you need to know and what tests you need (to solve the oxygen sensor problem these diagnostic trouble codes indicate). Each one of...   read more >>

P0141, P0161 -Downstream O2 Sensor Test (2003-2005 GM 5.3L, 6.0L)

P0141, P0161 -Downstream O2 Sensor Test (2003-2005 GM 5.3L, 6.0L)

Testing the post-catalytic converter oxygen (O2) sensors, to see if they are causing the P0141 or P0161 to light up your check engine light (CEL) on your instrument cluster is not hard to do. With the testing instructions, in this tutorial, I'll...   read more >>

How to Troubleshoot a Misfire (GM 4.8L, 5.3L, 6.0L)

How to Troubleshoot a Misfire (GM 4.8L, 5.3L, 6.0L)

Finding the exact cause of a Misfire can sometimes be a challenge that can have you pulling out your hair (and spending money on parts that don't solve the problem). Why? Because anything from a BAD COP Coil to low Engine Compression can cause a... read more >> (at: easyautodiagnostics.com)

Crank Sensor Test -No Spark No Start Tests (GM 4.8L, 5.3L, 6.0L)

Crank Sensor Test -No Spark No Start Tests (GM 4.8L, 5.3L, 6.0L)

If the crank sensor fails, in your 4.8L, 5.3L or 6.0L GM vehicle... it's not gonna' start. In this article, I'll show you how to test it using a multimeter (in Volts DC mode). The crank sensor test in this article is an On Car Test. It's not...   read more >>