Diagnostic Aids

1994 Chevrolet Lumina BaseSECTION Diagnostic Aids

See Code 59 chart to check transmission temperature sensor temperature-to-resistance values. Also, check transmission fluid level.

Fig 1: Code 79 Schematic (3.1L) Transmission Fluid Overtemp
G94F35167
RENDER: 1.0x

NO RELATED

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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.