2009 Chevrolet Silverado – Poor Heat If Temperature Set Below 90°F

This 2009 Chevrolet Silverado came in with the complaint that the heater was only mildly hot unless the temperature was set to 90°F. When set to 90° the heat worked very well. I should point out that this truck has automatic HVAC controls as evidenced by the word “Auto” on the control head assembly. I … Continue reading “2009 Chevrolet Silverado – Poor Heat If Temperature Set Below 90°F”

2009 Chevrolet Silverado Driver’s Side Air Stuck On Heat

This 2009 Chevrolet Silverado came in with the complaint that the a/c was blowing out hot air on the driver’s side of the dash.The vent temperature was 140°F and the outside air temperature was 97°F in August in sunny South Carolina. I told the customer that I would not be able to get to it … Continue reading “2009 Chevrolet Silverado Driver’s Side Air Stuck On Heat”

2008 Chevrolet Avalanche Right Front Turn Signal Inop

This 2008 Chevrolet Avalanche came in with the complaint that the right front turn signal did not work. This article applies to Avalanche, Escalade, Silverado, Sierra, Suburban, Tahoe and Yukon trucks and suv’s.  This generation of GM truck or Suv does not use a turn signal flasher relay as we have always known in the … Continue reading “2008 Chevrolet Avalanche Right Front Turn Signal Inop”

2007 GMC Yukon Multiple Misfires-Codes-P0300-P0352-P0354-P0356-P0358

This 2007 GMC Yukon came in with multiple complaints among which were the engine seemed to have no power, the Service Engine Soon, ABS and Traction lights were on and there was a stability message displayed in the Driver’s Information Center (DIC). The customer also stated that the vehicle ran fine sometimes but as soon as the … Continue reading “2007 GMC Yukon Multiple Misfires-Codes-P0300-P0352-P0354-P0356-P0358”

2004 Chevrolet Tahoe, Compressor Will Not Turn On

This 2004 Chevrolet Tahoe came in with the complaint that the a/c was not cold due to the compressor not coming on. Whenever the a/c was turned on the snowflake on the digital display would flash. This Tahoe has auto a/c controls. I checked codes with my Tech 2 scan tool and there was a … Continue reading “2004 Chevrolet Tahoe, Compressor Will Not Turn On”

2004 GMC Yukon, Power Windows & Seats Inop, Airbag Light Is On

This GMC Yukon came in with the complaint that the power windows and power seats did not work and the Airbag light was on. Checking the fuses found that the SIR or airbag light 15 amp fuse was blown. I also found that the 50 amp MBEC fuse was blown. I replaced both fuses and … Continue reading “2004 GMC Yukon, Power Windows & Seats Inop, Airbag Light Is On”

GM “C/K” & “S/T” Vehicles, HVAC Recalibration Using a Tech 2 Scan Tool

It Recently came to my attention that some of my readers wanted to see how to perform an actuator recalibration using a Tech 2 scan tool. The pictures are dark and they are best viewed in low light conditions. Connect the scan tool to the DLC and turn the ignition on. After entering the year,make, … Continue reading “GM “C/K” & “S/T” Vehicles, HVAC Recalibration Using a Tech 2 Scan Tool”

2005 Chevrolet Silverado, Adding Factory Cruise Control

This 2005 Chevrolet Silverado came in with the complaint that it did not have cruise control. The customer, whom I have known for a long time, asked if I thought cruise control could be added to his truck. I was not sure. He stated that he had found several references to doing just that with … Continue reading “2005 Chevrolet Silverado, Adding Factory Cruise Control”

2006 GMC Yukon, P0449

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”

2003 Chevrolet Silverado, Blower Does Not Work On Any Speed

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”