Ignition Coil Circuit Wiring Diagram (2003-2007 V8 Chevrolet Express, GMC Savana)

APPLIES TO: This ignition system wiring diagram applies to the following vehicles:

Chevrolet:

• Express (1500) 4.8L, 5.3L: 2003, 2004, 2005, 2006, 2007
• Express (2500) 4.8L, 5.3L, 6.0L: 2003, 2004, 2005, 2006, 2007
• Express (3500) 4.8L, 6.0L: 2003, 2004, 2005, 2006, 2007

GMC:

• Savana (1500) 4.8L, 5.3L: 2003, 2004, 2005, 2006, 2007
• Savana (2500) 4.8L, 5.3L, 6.0L: 2003, 2004, 2005, 2006, 2007
• Savana (3500) 4.8L, 6.0L: 2003, 2004, 2005, 2006, 2007

The following tutorial explains how to test the ignition coils:

• How To Test The COP Coils (GM 4.8L, 5.3L, 6.0L, 8.1L) (at: easyautodiagnostics.com).

If you need to test the crankshaft position sensor, see this tutorial:

• CKP Sensor Test -No Spark No Start Tests (GM 4.8L, 5.3L, 6.0L).

RELATED WIRING DIAGRAMS:

• Starter Motor Circuit Diagram (2003 V8 Chevrolet Express, GMC Savana).
• Fuel Pump Wiring Diagram (2003-2007 V8 Chevrolet Express, GMC Savana).

More Chevrolet Express (GMC Savana) Tutorials

You can find a complete list of V8 Chevrolet Express (GMC Savana) tutorials in this index:

• GM 4.8L, 5.3L, 6.0L Index Of Articles.

Here's a small sample of the tutorials you'll find in the index:

• CKP Sensor Test -No Spark No Start Tests (GM 4.8L, 5.3L, 6.0L).
• Bad Fan Clutch Troubleshooting Case Study (GM 4.8L, 5.3L, 6.0L).
• How To Do A Compression Test (2003-2014 V8 Chevrolet Express, GMC Savana).
• How To Test The Fuel Pump (2003-2007 V8 Chevrolet Express, GMC Savana).