This 2006 GMC Yukon came in with the Service Engine Soon (SES) light on and a code P0449 stored in the PCM memory. This test should be done on the vehicle but I could not figure a way to o the test and position everything for a good picture. So you will just have to … Continue reading “2006 GMC Yukon, P0449”
This 2003 Chevrolet Silverado came in with the complaint that the blower did not work on any speed. The ABS and Brake lights were on as well. Testing begins at the HVAC fuses in the driver’s side fuse box that is located behind the dash end cap. The fuses need to be checked with the … Continue reading “2003 Chevrolet Silverado, Blower Does Not Work On Any Speed”
This 2000 Chevrolet Suburban came in with the complaint that the instrument cluster does not work. I checked communication with my Tech 2 scan tool and found a communication problem with most modules. Including the instrument cluster. Since my scan tool would power up, I knew that I had power to the DCL and at … Continue reading “2000 Chevrolet Suburban, Instrument Cluster Does Not Work”
This is a list of procedures to replace the multiple actuators on General Motors Trucks and SUV’s from 1999 to 2009. These posts will apply to all of the Full Sized Trucks and SUV’s listed below. There may be slight differences between brands and trim levels. HVAC Calibration Procedure GM Trucks And SUV’s 2003 Chevrolet … Continue reading “Actuator Replacement GM Trucks and SUV’s 1999-2009”
This 2003 Chevrolet Avalanche with a 5.3 liter VIN “T” engine was towed in with the complaint that the engine would not run. I went to check codes and data and found that communication to the PCM was down. I checked all of the fusees under the hood and in the interior fuse box. No … Continue reading “2003 Chevrolet Avalanche, No Run Condition”
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 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 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”
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”
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”