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  1. B

    Park lights go off when high beams go on

    1987 V3500. When I turn on the headlights to the park light position, the headlights come on and no park light, when in the headlight position everything is on, turn on high beam, park lights go out, don't think the dash lights are working either
  2. B

    Throttle sticking

    what would cause the throttle to stick on 1987 7.4 tbi only when trying to depress the accelerator. when the engine is off the accelerator moves free
  3. B

    7.4 tbi overheating

    also only component not replaced was the fan clutch
  4. B

    7.4 tbi overheating

    yes it is. overheated before this and it had original pump
  5. B

    7.4 tbi overheating

    thermostat has a bleed hole in it .
  6. B

    7.4 tbi overheating

    I have a 1987 GMC V3500 pickup truck . Was overheating, blew off side tank of radiator. Replaced radiator, thermostat, coolant sensor at thermostat, waterpump and radiator cap, 16 psi. Also the thermostat is high flow with the air vent hole. Ran garden hose in motor to try to flush for blockage...
  7. B

    would a TPS cause the throttle to stick on 1987 7.4 tbi only when trying to depress the accelerator. when the engine is off the accelerator moves free

    would a TPS cause the throttle to stick on 1987 7.4 tbi ?

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