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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 59 (ENGINE CONTROLS SELF-DIAGNOSTICS - 4.3L)DIAGNOSTIC TESTSDTC P0500: VEHICLE SPEED SENSOR (M/T)CONDITIONS FOR RUNNING DTC
1999 GMC Forward Control 5.7 R, Automatic

Conditions For Running DTC

1999 GMC Forward Control 5.7 R, AutomaticSECTION Conditions For Running DTC
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 GMC Sonoma, 2002 GMC Safari, 2002 GMC Jimmy, 2002 Chevrolet S10 Pickup, and 2002 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.
  • No Manifold Absolute Pressure (MAP) Sensor DTCs P0106, P0107 or P0108.
  • No Throttle Position (TP) or Accelerator Pedal Position (APP) Sensor DTCs P0121, P0122, P0123.
  • No crankshaft position sensor DTCs P0335 or P0336.
  • The ECT is greater than 95°F (35°C).
  • The TP sensor angle is 5-100 percent.
  • The engine speed is greater than 1000 RPM.
  • The MAP is 40-100 kPa.
  • All of the above conditions are met for two seconds.
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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.