2005 GMC Sierra, Air Blows Only From Defroster Vents

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”

2004 Chevrolet Tahoe, Rear Blower Will Not Turn Off.

This 2004 Chevrolet Tahoe came in with the complaint that the rear blower would not turn off and the battery went dead as a result. This Tahoe has manual a/c controls. The first thing that I did since the vehicle had to be jumped off to get it to my shop was to turn the … Continue reading “2004 Chevrolet Tahoe, Rear Blower Will Not Turn Off.”

2004 Chevrolet Silverado, Changing The Passenger Side Blend Door Actuator, B0424

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”

2003 Chevrolet Silverado, Changing the Mode Actuator, Code B0263

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”

2003 Chevrolet Silverado, A/C Leaks

This 2003 Chevrolet Silverado had come in about a month earlier, on a Friday afternoon and the customer wanted the system cold for a trip he was going on. The system had a low refrigerant charge. I added dye and oil, vacuumed it down and recharged the system. I advised the customer to come back … Continue reading “2003 Chevrolet Silverado, A/C Leaks”

Changing The Recirculation / Fresh Air Door Actuator Part 2

This 2004 Chevrolet Avalanche came in with multiple a/c problems including a code B0268, fault in fresh air /recirculation actuator assembly. This procedure applies to full sized Chevrolet and GMC trucks from 2003 to 2007 Classic. Avalanche, Sierra, Silverado, Suburban, Tahoe and Yukon. 1999 through 2002 Trucks would also be very similar. This post is … Continue reading “Changing The Recirculation / Fresh Air Door Actuator Part 2”

2004 Chevrolet Tahoe, Code P0178

This 2004 Chevrolet Tahoe came in with the SES light on and complaints of poor fuel economy and a “strange feel to the engine”. I checked codes and found a code P0178 stored along with misfire and lean codes. P0178 is set if the frequency reading in the fuel composition sensor is below 45 Hz … Continue reading “2004 Chevrolet Tahoe, Code P0178”

2005 Chevrolet Silverado Blower Inop

This is a very common problem on 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 and 2007 Chevrolet Silverado and GMC Sierra trucks. Over a period of time the resistor and usually the connector overheat and blower operation stops in some or all speeds. The blower resistor is located on the passenger side of the … Continue reading “2005 Chevrolet Silverado Blower Inop”