Reference Information
WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
Schematic Reference
Engine Controls Wiring Schematics
Connector End View Reference
Master Electrical Component List , or COMPONENT CONNECTOR END VIEWS - INDEX
Description and Operation
Electronic Ignition System Description
Electrical Information Reference
- Circuit Testing
- Connector Repairs
- Testing for Intermittent Conditions and Poor Connections
- Wiring Repairs
Scan Tool Reference
Special Tools
EL 26792 HEI Spark Tester
For equivalent regional tools, refer to Special Tools (Diagnostic Tools) .