This 2004 Chevrolet Trailblazer came in with the complaint that neither one of the low beam headlights would work. They both stopped working at the same time. The customer had already paid another shop to have the headlight and dimmer switches replaced. After several days of trying hit and miss diagnosis she called me. I told … Continue reading “2004 Chevrolet Trailblazer, No Low Beam Headlights”
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 2005 GMC Sierra came in with a poor run condition and multiple misfire codes stored. Code P0304 was one of the misfire codes stored. While looking at data I noted that misfires on cylinder #4 were markedly higher that most of the other cylinders. Normally when confronted with high misfire counts on this engine … Continue reading “2005 GMC Sierra, Multiple Misfires”
This 2005 GMC Sierra came in with the complaint that the speedometer does not work. In fact it was stuck at 55 mph when it was sitting in the shop key on engine off. This repair can apply to any one of up to seven gauges on 2003 through 2007 Classic series Cadillac, Chevrolet and … Continue reading “2005 GMC Sierra, Speedometer Sticks, Replacing Faulty Gauge Stepper Motors”
This 1995 GMC C1500 came in with the complaint that the air would blow from everywhere except the front vents. In using the controls, the air flow would adjust from the defrost to the floor. All other functions were okay as well. The mode actuator is located under the driver’s side of the dash, above … Continue reading “1995 GMC C1500, Air Will Not Blow Out The Vents”
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 2003 Chevrolet Trailblazer had a loud ticking noise coming from the rear of the vehicle on the passenger side. In the last post I showed how to remove the trim panels and locate the faulty actuator assembly. Please click here to see that part of this repair. Once the trim panels were removed it … Continue reading “2003 Chevrolet Trailblazer, Changing the Rear Mode Actuator”
This 2003 Chevrolet Trailblazer came in with the complaint that there was a loud ticking sound coming from the rear of the vehicle. From experience I knew that one of the rear actuators was making the clicking or ticking sound. I checked the rear controls and found that adjusting the mode position would make the … Continue reading “2003 Chevrolet Trailblazer, Clicking Sound From Rear HVAC Unit”
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”
I have separated the information that I have for the model years 1995 through 2012. This list covers the following model trucks, suv’s and vans that were made by General Motors but sold under the Buick, Cadillac, Chevrolet, GMC, Isuzu, Oldsmobile and Saab brands. The following list of vehicles use the same blower resistor and … Continue reading “Blower Motor Systems For GM Manufactured Trucks, SUV’s and Vans 1995-2012”