Circuit/System Verification

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.

NOTE:

Cold Start-Up = Required

Engine - Idling
Verify the scan tool parameter: Cylinder 1 - 6 Current Misfire Counter = Less than 1
- If 1 or greater
1. Ignition - On / Vehicle - In Service Mode & Engine - Off
2. Verify the following conditions do not exist:
  - Fuel Pressure - Low / High - Refer to: Fuel System Diagnosis .
  - Fuel - Contaminated / Poor Quality - Refer to: Alcohol/Contaminants-in-Fuel Diagnosis
  - If a condition exists - Repair or replace as necessary
  - If no condition exists - Replace the component: Q17 Fuel Injector
- Go to next step: If less than 1
All OK.