GM 2.8L Index of Articles

How To Test The Blower Control Switch (2.8L Chevy S10/ GMC S15)

How To Test The Blower Control Switch (2.8L Chevy S10/ GMC S15)

The blower motor control switch, on your Chevrolet S10 (GMC S15) can be easily tested to find out if it's bad (or not). In this tutorial, I'll show you two different ways of doing this. Contents of this tutorial at a quick glance: Basics...   read more >>

How To Test The Blower Resistor (2.8L Chevy S10/GMC S15)

How To Test The Blower Resistor (2.8L Chevy S10/GMC S15)

The blower motor resistor can be easily tested with a set of simple multimeter resistance tests (especially since it's very accessible). So, if you suspect that the blower motor resistor, in your 2.8L Chevy S10 (GMC S15), is bad... I'll show you...   read more >>

How To Test The Throttle Position Sensor (1991-1993 2.8L Chevy S10 Pick Up)

How To Test The Throttle Position Sensor (1991-1993 2.8L Chevy S10 Pick Up)

Testing the throttle position sensor (TPS) on your 1991, 1992, 1993 2.8L Chevy S10 Pick-up can be accurately done with a simple multimeter. In this tutorial I'll show what and how to test it to find out if the TPS is fried or not. The contents...   read more >>

How To Test The Blower Motor (2.8L Chevy S10/ GMC S15)

How To Test The Blower Motor (2.8L Chevy S10/ GMC S15)

The blower motor, on your Chevy S10 (GMC S15), is one of the easiest components to test. In this tutorial I'll show you how in a step-by-step manner. Here are the contents of this tutorial at a quick glance: Symptoms A Of Bad Blower...   read more >>

How To Test The MAP Sensor With A Multimeter (2.8L Chevy S10, GMC S15)

How To Test The MAP Sensor With A Multimeter (2.8L Chevy S10, GMC S15)

Your 2.8L Chevrolet S10's (GMC S15's) fuel system is a speed-density type... which means that the fuel injection computer relies heavily on the MAP sensor to know how much fuel to inject into the engine. So, when the manifold pressure (MAP)...   read more >>

How To Retrieve OBD I Trouble Codes (2.8L Chevy S10, GMC S15)

How To Retrieve OBD I Trouble Codes (2.8L Chevy S10, GMC S15)

GM's on-board diagnostic system on all pre-1996 S10/S15 vehicles have the capability of displaying trouble codes by jumpering two terminals of the diagnostic link connector (DLC). In this tutorial, I'll show you where to find this connector and...   read more >>

How To Test For a Bad Alternator (2.8L V6 S10/S15)

How To Test For a Bad Alternator (2.8L V6 S10/S15)

Sooner or later, the alternator on your 2.8L equipped S10 Pick-up (S10 Blazer, GMC S15 Pick-up, or GMC S15 Jimmy) is gonna' fail. Thankfully, testing it is a pretty easy and straight-forward process. In this tutorial I'll show you just how easy it...   read more >>

Vacuum Hose Routing Diagram 1988 GM 2.8L S10/S15

Vacuum Hose Routing Diagram 1988 GM 2.8L S10/S15

The vacuum hose routing diagram label is usually located in one of two spots: on the underside of the hood or on the top of the fan shroud. Here's a copy I made myself with the intention of helping the DIY...   read more >>

How To Test Engine Compression (2.8L S10 Pickup/Blazer)

How To Test Engine Compression (2.8L S10 Pickup/Blazer)

This tutorial will help you test the engine compression on your 2.8L S10 Pick-up or 2.8L S10 Blazer. It'll also help you to further narrow down the problem, if you do find low compression in one or more cylinders, to either the cylinder head valves...   read more >>