The heater blows but very little air comes out any of the vents or defrost.I have checked the the diverter doors and also blew the end the heater main point the finest I can while still in the van.I require help.


You are watching: 1994 chevy silverado cabin air filter location

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No girlfriend don"t have a cabin filter, if friend did there would be a item of plastic in prior of the windshield top top the pass side the lifts up to access it. You may have aproblem v the actuators that control air flow. One of two people it"s not getting electric or vacuum to run it. I"ll send a generic pic follow me so you can see what come look for. There must be 2. They space under the dash.
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I have actually a 98 k-1500, i am a lawn an landscaper and use mine truck all day and year. In ~ times once I use heat or ac I get a foul odor comes from vents. Execute I have actually a in cabin air filter?And if so whereby is it and how execute I adjust it any aid would be greatly appreciated.
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no equipped with a factory-installed cabin waiting filter ConditionSome customers might comment around musty odors emitted indigenous the Heating, Ventilation and also Air conditioning (HVAC) system at auto start-up in hot, humid conditions.CauseThis problem may be resulted in by condensate build-up on the evaporator core, i beg your pardon does no evaporate by itself in high humidity conditions. The odor may be the result of microbial development on the evaporator core. When the blower motor fan is rotate on, the microbial expansion may release an unpleasant musty odor right into the passenger compartment.There are numerous other feasible sources of a musty odor in a vehicle. A common resource is a water leak into the internal of the automobile or foreign material in the HVAC air distribution system. Monitor the steps in SI for identifying and also correcting water leaks and also air inlet inspection.The procedure consisted of in this bulletin is only applicable if the odor source has been identified to be microbial growth on the evaporator main point inside the HVAC module.CorrectionMany vehicles at this time incorporate an afterblow function within the HVAC control module software. The afterblow feature, when enabled, employs the HVAC blower pan to dry the evaporator after car shut down and also this duty will inhibit microbial growth. Technicians room to check that the customer issue is evaporator core odor and also that the auto has the imbedded afterblow feature, as defined in the SI file for that details vehicle model, model year and details HVAC option. Describe SI for permitting the afterblow function. Vehicles being ceded in areas prone come high humidity problems may advantage from having actually the afterblow permitted calibration set up prior to any kind of customer comment.IMPORTANT:If the automobile is not factory equipped with the imbedded afterblow permit feature, it might be included with the digital Evaporator Dryer Module Kit (P/N 12497910 or AC Delco 15-5876).IMPORTANT:When installation the digital Evaporator Dryer Module, you should use the consisted of electrical splice connectors come ensure a proper splice. Finish detailed environment instructions and self trial and error procedures are supplied with the kit. If necessary, the digital Evaporator Dryer Module may be set up underhood if it is defended from extreme heat and water splash areas.To immediately remove the evaporator main point odor top top all doubt vehicles, it is crucial to eliminate the microbial growth and prevent its re-occurrence. To accomplish this, do the following procedure:Vehicle and Applicator tool PreparationThe evaporator core must be dry. This may be completed by disabling the compressor and running the blower fan on the recirc heat setup for an extended period of time. Note: Compressor engagement will reason the evaporator core to remain wet and will prevent full adherence of the Coiling Coil Coating to the evaporator main point surfaces.Verify the the waiting conditioning drain hose is no clogged and place a drainpipe pan in ~ the vehicle.Place a security cover end the carpet below the evaporator core.Remove the cabin wait filter, if equipped, and cover the opening prior to applying the Cooling Coil Coating, as the product may clog the filter. If the cabin waiting filter shows up to have little or no remaining life, imply a replacement to your customer.If the HVAC module has actually a blower engine cooling tube, be cautious NOT come SPRAY THE COOLING COIL COATING into THE BLOWER engine COOLING TUBE.Attach the flexible Applicator press Spray tool (J-43810-20A) come a compressed waiting line operating at 586 kPa (85 psi) to 793 kPa (115 psi).Shake the bottle of Cooling Coil Coating well. Screw the bottle onto the cap on the applicator tool"s pick-up tube. NOTE: The pick-up tube is designed for 120 ml (4 oz) and 240 ml (8 oz) bottles and should coil contempt in the bottom that a 120 ml (4 oz) bottle.Use among the complying with three techniques to use the Cooling Coil Coating.IMPORTANT:If the pressure Applicator Spray tool (J-43810-20A) is not available, the Cooling Coil Coating is also obtainable in an aerosol can (P/N 12377951 (in Canada, 10953503)).Application through Blower Motor manage Module OpeningRemove the blower motor manage module (blower engine resistor). Refer to the applicable procedure in SI.Clean any debris or international material from inside the HVAC module and on the evaporator core surface.Apply the Cooling Coil Coating straight to the evaporator core through the blower motor blower motor manage module (blower motor resistor) opening.Use the versatile wand to straight the Cooling Coil Coating over the whole evaporator core and also surrounding gasket surfaces.When the application is complete, download the blower engine blower motor regulate module (blower motor manage module).Application v Blower engine OpeningRemove the blower motor. Refer to the applicable blower motor removal procedure in SI.Clean any type of debris or international material from within the HVAC module and also on the evaporator main point surface.Apply the Cooling Coil Coating directly to the evaporator core with the blower motor opening.Use the versatile wand to straight the Cooling Coil Coating end the whole evaporator core and also surrounding gasket surfaces.When the application is complete, download the blower motor.Application v a feet in the HVAC ModuleIf no of the two previous application techniques are available, it may be essential to drill a hole in the HVAC module.Locate one area the the HVAC module between the blower motor and also the evaporator core. Drill a 10 mm (3/8 in) hole in the HVAC module. Use caution to keep the drill clear of the evaporator core and also the blower motor fan.With the air circulation vents closed and also the blower engine fan rate on HIGH, insert the applicator tool right into the hole and also spray the Cooling Coil Coating right into the airstream towards the evaporator core.Use a GM authorized RTV sealant come plug the hole in the HVAC module.After the Cooling Coil Coating application is complete, start and run the vehicle for approximately 10 minutes, through the compressor disabled, HVAC mode collection to Recirculate/Max, heat set to full warm, blower engine fan speed on high, and also one home window open roughly 12 mm (1/2 in). This cures the Cooling Coil Coating ~ above the evaporator main point surface.While the engine is running, rinse the applicator device with warm water to extend the life of the tool. Be sure to spray warmth water v the nozzle to rinse out any type of residual Cooling Coil Coating quiet in the capillary choose up tube, otherwise it will certainly dry and clog the applicator tool. Additionally remove the little green valve native the party cap and rinse it thoroughly while rolling it between two fingers and then reinstall it. If this valve is clogged, the Cooling Coil Coating will not flow through the applicator tool.Shut turn off the engine and allow the compressor again.Verify proper HVAC mechanism operation.Remove the protective covering from within the vehicle.Remove the drainpipe pan from underneath the vehicle.