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HOMESERVICE MANUALSCHEVROLET1987STEP VAN P20, 7.4 W, AUTOMATIC, 400/M40REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 31 (ENGINE CONTROLS - REMOVE/INSTALL/OVERHAUL)FUEL SYSTEM (DIESEL)GLOW PLUGREMOVALRIGHT SIDE
1987 Chevrolet Step Van P20, 7.4 W, Automatic, 400/M40

Right Side

1987 Chevrolet Step Van P20, 7.4 W, Automatic, 400/M40SECTION Right Side
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 1994 GMC Yukon, 1994 GMC Suburban, 1994 GMC Pickup, 1994 GMC Cab & Chassis, and 1994 GMC C3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. Raise and support vehicle.
  2. Remove right wheel.
  3. Remove splash shield from right front wheelwell.
  4. Remove lead wire from glow plug in cylinder No. 2.
  5. Remove lead wires for glow plugs in cylinders No. 4 and 6 at harness connectors.
  6. Remove heat shroud from glow plug in cylinder No. 4.
  7. Remove heat shroud from cylinder No. 6. Slide shrouds back far enough to allow access for unplugging the wires at cylinders No. 4 and 6 glow plugs. Use Glow Plug Remover & Installer (J-39083) to disconnect glow plug wires.
  8. Remove glow plugs from cylinders No. 2, 4 and 6.
  9. Disconnect lead wire at glow plug from cylinder No. 8 by reaching from underneath the vehicle.
    10. NOTE: For easier access to glow plugs on cylinders No. 6 and 8, it may be necessary to remove the exhaust down pipe from turbo charger.
  10. Remove glow plug from cylinder No. 8.
RENDER: 1.0x

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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.