1983 Chevrolet Sportvan G10, 5.7 LFACTORY OEM SERVICE PROCEDURE

Fuel Evaporation System: Maintenance

The charcoal canister is the only serviceable item. It should be replaced every 24 months or 30,000 miles on Light Duty Emission models and every 24 months or 24,000 miles on Heavy Duty Emission models. If operated in severe conditions, more frequent replacement may be required.

Fig 1: Vacuum Hose Routing for Single-Canister Evaporative Control System Canister must be lowest point in system.
G8747
Factory Service Tools

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When to See a Mechanic

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

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

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