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HOMESERVICE MANUALSGMC1996SAFARI VAN M V6-4.3L VIN WREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSCIRCUIT OPERATIONFRONT HEATER - WITHOUT A/C
1996 GMC Safari Van M V6-4.3L VIN W

Front Heater - Without A/C

1996 GMC Safari Van M V6-4.3L VIN WSECTION Front Heater - Without A/C
The Blower Motor delivers air to the interior of the vehicle. Its speed is controlled by the Blower Switch and the Blower Resistors. When the Ignition Switch is in RUN Battery Voltage is supplied to the Blower Switch. With the Blower Switch in LO. voltage is supplied across all three Blower Resistors and the Blower Motor. The Blower Motor runs at its slowest speed. With the Blower Switch in MED1, one of the three Blower Resistors is bypassed and the Blower Motor runs faster. With the Blower Switch in MED2, two of the three Blower Resistors are bypassed and the Blower Motor runs faster yet. When the Blower Switch is set to HI. Battery Voltage is supplied directly to the Blower Motor and the Blower Motor runs at its fastest speed.
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.