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

Sooner or later, the spark plugs in your 4.3L V6, 5.0L V8, or 5.7L V8 Chevy pick-up (van or SUV) are gonna' wear out and are gonna' need to be replaced. But, in a lot of... [read more]

NOTE: The illlustrations and info in this page apply only to 1994 Chevrolet/GMC pickups with a 4.3L, 5.0L or a 5.7L engine. For the 1993 fuel pump wiring diagram, check out... [read more]

As you're already aware, the throttle body fuel injection system on your 1987 to 1995 4.3L, 5.0L, or 5.7L pickup (or SUV) uses a low pressure (12 PSI) electric fuel pump... [read more]

The 1994 throttle body fuel injection (TBI) system's computer has 2 connectors. One is red and the other is a blue one. Each connector has 2 rows of 16 slots for a total of... [read more]

This tutorial will help to test the throttle position sensor (TPS) circuits between the PCM and TPS connector to see if they are shorted together or ‘open’ (or... [read more]

NOTE: The wiring diagram illustrations in this article cover only: 1993 4.3L, 5.0L, and 5.7L GMC/Chevrolet pickups with the 4L60-E automatic transmission. For the 1994 fuel... [read more]

This tutorial addresses a very common problem I've seen on the 1987-1995 GM 4.3L, 5.0L, and 5.7L engines with throttle body fuel injection system: a stuck open EGR... [read more]

The 1995 throttle body fuel injection (TBI) system's computer has 2 connectors. One is red and the other is a blue one. Each connector has 2 rows of 16 slots for a total of... [read more]

Is there a good chance that the PCM has fried and is the one causing the MAP sensor trouble code that NEVER goes away no matter what you do or replace? The sad answer is... [read more]

In the table below you'll find the fuse location and description of the fuses of the fuse box on 1993 4.3L, 5.0L, 5.7L TBI equipped 4.3L, 5.0L, and 5.7L... [read more]