Here’s a fantastic video on how to diagnose a bad MAF sensor using a multimeter from Ratchets and Wrenches on YouTube. Some of this coolant is diverted from the cooling system into a … replaced 2001 chevy silverado not blowing any hot air. The only monitor that has not completed is the secondary air injection. My 2001 Chevrolet ciera 1500 is blowing cold air while heat is on , I checked the coolant level is good and sometimes it will blow a little warmer 2001 Chevrolet Silverado 1500 Maintenance & … It sounds like the motor is working working just as hard as it used to, but it's just not blowing out the vents as hard. My 2001 Chevy Sivlerado AC system has a 5 point switch from 1-5 on blower speed. This article applies to the Chevrolet Silverado GMT800 (1999-2006). Check the fusebox first, which is located under the hood near the driver’s side fender on 1999 through 2010 Silverado model years and on the left side of the instrument panel on older models (refer to your owner's manual). 2001 Chevy Silverado 5.3L Guys, I need some help with my 2001 5.3l Silverado. Chevrolet Silverado 1500 owners have reported 59 problems related to air conditioner (under the equipment category). Now 2, 3 & 4 are not working I hear the compressor kicking in and I believe the trouble is the blower motor or a relay or maybe even the switch in the dash. 2001 chevy silverado not blowing any hot air. The heater in your Chevy Silverado supplies the heat to the cabin. It's sitll cold. How to fix air that only blows through defrost vent. replaced the blend door actuator last spring thought it was fixed but now that its cold no hot air, it was intermited before … Chevy Silverado P0101 Diagnosis: MAF Sensor; Chevy Silverado P0102: MAF Sensor Circuit Low; There are other codes related to the mass air flow sensor as well, but these are the most common ones. Secondary air monitor will not run. There could be several reasons why it's not working properly. replaced the blend door actuator last spring thought it was fixed but now that its cold no hot air, … There are several signs that you can look for to tell if your blower motor might be on its way out—for instance, if your HVAC blower does not operate at different speed settings or doesn't work at all, that could be a sign the motor is on its way out. Chevy silverado. 1996 chevy suburban front air not blowing hard through the vents but some air is coming through the defrost vent vents in dash are not opening and closing properly. I need to smog test my truck but in Caliornia all monitors must be ready to pass. I dealt with it. could be in switch panal and could be a vaccum leak in a line under the dash. The truck is not throwing any codes and there are no drivability issues. The most recently reported issues are listed below. The settings are correct for max A/C. Blower speeds 1 & 5 stopped functioning but 2-4 worked. The first thing to check if your compressor will not engage is the electrical system. My A/C is suddenly not blowing as hard as it used to. Chevrolet: 2001 chevy silverado not blowing any hot air. 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