GM 4.3L, 5.0L, 5.7L Index of Articles

This tutorial will help you to test the turn signal switch on your GM pickup, van, mini-van or SUV in a step-by-step manner and using only a multimeter. If you've already... [read more]

This case study will help you to diagnose a ‘Spider’ fuel injector that is stuck open due to the PCM having fried and causing one of two things: A misfire... [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]

The most common type of failure in the CPI ‘Spider’ fuel injector system is usually fuel leaks (inside the intake manifold plenum). But, every now and then,... [read more]

This article will help you to troubleshoot the engine coolant temperature (ECT) sensor on your GM 4.3L, 5.0L, or 5.7L equipped pick up, van, mini-van or SUV. You can... [read more]

This article will help you to troubleshoot and diagnose a bad crankshaft position sensor on your 4.3L, 5.0L and 5.7L Vortec equipped GM Pick Up or SUV. Since the 3-wire... [read more]

When the thermostat, in your GM 4.3L, 5.0L or 5.7L pick up, SUV, or van fails, it does one of two things: it stays stuck open or stuck closed. If it stays stuck closed,... [read more]

Diagnosing trouble codes: P0172 (System too Rich Bank 1) and/or P0175 (System too Rich Bank 2) can be a challenge on your GM 4.3L, 5.0L, 5.7L equipped GM pick-up, van, SUV... [read more]

In this article, I'll show you how to test the transmission shift solenoids (specifically 1-2 solenoid and 2-3 solenoid) on your GM 4.3L, 5.0L, 5.7L pick up, van,... [read more]

Testing a leaking ‘Spider’ fuel injector assembly or a leaking fuel pressure regulator (GM 4.3L, 5.0L, or 5.7L ) can seem impossible, since both of these bad... [read more]