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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 929 (Engine Controls And Fuel - 4.8L, 5.3L, 6.0L And 6.2L - DTC P0010 To DTC P230) >> DTC P0107 or P0108 >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2007 GMC Sierra, 2007 GMC Cab & Chassis Sierra, 2007 Chevrolet Silverado, and 2007 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: You must perform the Circuit/System Testing in order to verify the integrity of the MAP sensor circuits before proceeding with the Component Testing.
  1. Turn ON the ignition, with the engine OFF, and remove the MAP sensor.
  2. Install a 3A fused jumper wire between the 5-volt reference circuit and the corresponding terminal of the MAP sensor.
  3. Install a jumper wire between the low reference circuit of the MAP sensor and ground.
  4. Install a jumper wire to the MAP sensor signal circuit.
  5. Connect a DMM between the jumper wire from the MAP sensor signal circuit and ground.
  6. Install the J 35555  to the MAP sensor vacuum port. Slowly apply vacuum to the sensor while observing the voltage on the DMM. The voltage should vary between 0-5.2 volts without any spikes or dropouts.
    • If the voltage is not within the specified range or is erratic, replace the MAP sensor.
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