SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN CARGO EXTENDED, 5.7 R, L31/KL8REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 112 (ENGINE CONTROL SYSTEM - BASIC DIAGNOSTIC PROCEDURES)PRELIMINARY INSPECTION & ADJUSTMENTSVISUAL INSPECTION
2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8

Visual Inspection

2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8SECTION Visual Inspection
WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Several of the symptom procedures call for a careful visual/physical check. DO NOT neglect to perform the visual/physical check. The visual/physical check is an important procedure that can lead to the correction of a concern without further diagnosis. The performance of the visual/physical check can save valuable time.

Inspect all the PCM grounds for secure and clean connections that are in the proper location. Check all vacuum hoses for splits, kinks, and proper connections and routing, as shown on the vehicle emission control information label. Check for air leaks at throttle body mounting area and intake manifold sealing surfaces. Inspect the wiring harness for proper connections and damage. Visually inspect all electrical wiring. Look for chafed, stretched, cut or pinched wiring. Check the vacuum hoses thoroughly for any type of leak or restriction. Inspect the air inlet ducts for collapsed or restricted sections. If necessary, see VACUUM DIAGRAMS - VIBE article to verify routing and connections. Inspect air induction system for possible vacuum leaks. Repair as necessary. If vehicle has a no-start condition, go to NO-START DIAGNOSIS  .

RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

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.