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HOMESERVICE MANUALSCHEVROLET1997CHEVY EXPRESS G3500, VAN CARGO, 6.5 FREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 105 (ENGINE CONTROLS - TESTS W/O CODES - 5.7L)INTRODUCTION
1997 Chevrolet Chevy Express G3500, Van Cargo, 6.5 F

Section 105 (Engine Controls - Tests W/O Codes - 5.7L): Introduction

1997 Chevrolet Chevy Express G3500, Van Cargo, 6.5 FSECTION Introduction
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 1998 GMC Savana Special, 1998 GMC Savana Camper Special, 1998 GMC Savana, 1998 Chevrolet RV Cutaway, and 1998 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Models may use a Powertrain Control Module (PCM) or Vehicle Control Module (VCM). The term PCM will be used in this article to describe all control modules.

Before diagnosing symptoms or intermittent faults, perform basic testing steps in BASIC TESTING - 5.7L and self-diagnostic testing steps in TESTS W/CODES - 5.7L articles. Use this article to diagnose driveability problems if a current trouble code is not present or if not equipped with a self-diagnostic system.

Symptom checks are intended to direct technician to malfunctioning component(s) for further diagnosis. A symptom should lead to a specific component or system test, or an adjustment specification. Use intermittent test procedures to locate driveability problems not occurring when vehicle is being tested.

NOTE: For specific testing procedures, see SYSTEM/COMPONENT TESTS - 5.7L article. For specifications, see ADJUSTMENTS - 5.7L or SPECIFICATIONS - 5.7L article.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.