What to do if defrost on GMC Truck is not working?
1. Remove the floor air outlet duct extension (1) from the floor duct (2). 2. Remove the Body Control Module. 5. Disconnect the electrical connection from the mode actuator (10). 6. Remove the mode actuator mounting screws from the HVAC module. 7. Remove the mode actuator as an assembly with the actuator cam. 1.
Why are the vents on my GMC Sierra stuck?
The most common symptom of course is lack of control over the vent output position and normally it will be stuck in the defroster only position. If it is not currently stuck in the defroster position but you are changing the actuator anyways. make sure that you set the vent position to defrost before starting this procedure. You will see why later.
Where does the air come from in a GMC Sierra?
This 2005 GMC Sierra came in with the complaint that the air will only flow from the defroster vents, regardless of where it is commanded to. This Sierra has auto a/c controls and no floor mounted center console.
What to do if your defrost is not working?
Place the ignition switch to the OFF position. Remove the HVAC/ECAS fuse for a minimum of 10 seconds. Install the HVAC/ECAS fuse. Start the vehicle. Wait 40 seconds for the HVAC control module to self-calibrate. Verify that no DTCs have set as current DTCs.
1. Remove the floor air outlet duct extension (1) from the floor duct (2). 2. Remove the Body Control Module. 5. Disconnect the electrical connection from the mode actuator (10). 6. Remove the mode actuator mounting screws from the HVAC module. 7. Remove the mode actuator as an assembly with the actuator cam. 1.
The most common symptom of course is lack of control over the vent output position and normally it will be stuck in the defroster only position. If it is not currently stuck in the defroster position but you are changing the actuator anyways. make sure that you set the vent position to defrost before starting this procedure. You will see why later.
Why is fluid not coming out of my windshield washer pump?
The pump pressurizes the fluid so it can spray out, but it may work less effectively over time. If there isn’t fluid coming out when you turn on the pump, there may be a number of causes, so inspect the pump’s system to find the source.
What should I do if my windshield washer is not working?
Use a long pin or fine wire to pick out or poke through clogged dirt. Follow by rinsing the parts that are exposed with water. Have someone else turn on your car’s ignition. Ask them to activate the washer system to send out fluid. Let the washer fluid solution flush the system of remaining dirt or deposits.
Why does my car have no air in the vents?
Step 3 – A fan blower motor is controlled by either a switch in the passenger compartment or by a computer. If this fan motor is starting to fail it will cause the fan motor to run at a lower speed resulting in low air flow. To test this condition an amp meter is needed, connect the meter lead to the power wire of the fan motor.
How to troubleshoot and repair vents low air flow?
Easy step by step guide one how to troubleshoot and repair vent low air flow, this article pertains to most vehicles. Step 1 – Most air control vents are equipped with a flow control door that is located at the vent outlet. This door is controlled by a thumb wheel that when activated will open and close the vent air flow door.
Place the ignition switch to the OFF position. Remove the HVAC/ECAS fuse for a minimum of 10 seconds. Install the HVAC/ECAS fuse. Start the vehicle. Wait 40 seconds for the HVAC control module to self-calibrate. Verify that no DTCs have set as current DTCs.