2004 Pontiac GTO AutomaticFACTORY OEM SERVICE PROCEDURE

Visual and Physical Underhood Inspection

When you perform any diagnostic procedure or when you diagnose the cause of an emission test failure, Perform an underhood inspection. This procedure can often lead to repairing a problem without further steps. Use the following guidelines when you perform an underhood inspection:

  • Inspect all vacuum hoses for the following conditions:
    • Incorrect routing
    • Pinches
    • Cuts
    • Disconnected hoses
  • Inspect all wires in the engine compartment for the following conditions:
    • Incorrect connections
    • Burned or chafed spots
    • Pinched wires
    • Contact with sharp edges
    • Contact with hot exhaust manifolds

This inspection is very important. Perform the inspection carefully and thoroughly.

Factory Service Tools

Use the Manual With the Right Hardware

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

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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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