This 2005 Cadillac Escalade came in with the complaint that the driver’s side vents have switched to blowing only hot air with the a/c on. The passenger side air is cold. The telltale B0408 code for a faulty driver’s side blend/ temperature door actuator. Granted most people do not have a dealer level scan tool … Continue reading “2005 Cadillac Escalade, Driver’s Side Vents Blow Hot Air, A/C On”
The topic of how to perform the actuator recalibration procedure on Chevrolet , GMC and Cadillac Trucks and SUVs has become an ever increasing topic of discussion. For manual systems it does not matter where the a/c controls are set but if you feel the need to do something, turn the blower switch on (I … Continue reading “HVAC Actuator Recalibration Procedure For GM Trucks and SUVs”
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. Of course the customer brought the truck in, knowing that I had to lay under the driver’s … Continue reading “2005 GMC Sierra, Air Blows Only From Defroster Vents”
This 2003 Chevrolet Suburban came in with the complaint that the blower had lost speeds number 2 and 4. The customer was very concerned that the other speeds would soon fail too. This Chevy Suburban has manual HVAC controls so it uses a blower resistor assembly. Make sure the ignition remains off and remove the … Continue reading “2003 Chevrolet Suburban, No Blower Speeds 2 and 4”
This 2002 GMC Sierra came in with the complaint that the blower would work sometimes, but now, it would not work at all. This truck has manual HVAC controls so it uses a blower resistor assembly. I do not recommend disconnecting the battery while this work is being done. Instead make sure the ignition remains … Continue reading “2002 GMC Sierra Blower Works Sometimes”
This 2003 GMC Yukon came in with the complaint that the blower was doing weird things. The blower sometimes would not turn off when the ignition was turned off. Also sometimes the blower worked and sometimes it did not. Withe the local temperature expected to top off at over 100 degrees F and the the … Continue reading “2003 GMC Yukon Bower Erratic / Not Working”
This 2004 Chevrolet Silverado came in with a faulty passenger side blend door actuator. In the last post I got you to this point. If you have not yet read that post please click here. Now that the dash cover is off and you can see the actuator, but you still cannot get to it. … Continue reading “2004 Chevrolet Silverado, Changing The Passenger Side Blend Door Actuator, B0424”
This 2004 Chevrolet Silverado came in with multiple hvac actuator faults. After diagnosing a faulty passenger side blend air door actuator with my Tech 2 scan tool it was time to remove the dash cover. Not a big deal but there are a lot of steps. Lift the lower edge of the dash end caps … Continue reading “2004 Chevrolet Silverado, Dash Cover Removal”
This 2003 Chevrolet Silverado came in with the air flow stuck on defrost. A simple diagnosis of a code B0263 found a faulty mode actuator. This repair applies to 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, and 2011 Chevrolet Avalanche, Silverado, Suburban and Tahoe. It also applies to Cadillac Escalade, GMC Sierra and Yukon … Continue reading “2003 Chevrolet Silverado, Changing the Mode Actuator, Code B0263”
This 1998 Chevrolet C1500 came in with a no blower complaint. The starting place for testing is at the blower motor. The blower motor is located behind the passenger side of the dash and is accessed by removing the glove box. After opening the glove box there are two retainers that have to be dealt … Continue reading “1998 Chevrolet C1500, Changing The Blower Motor”