This 2002 Chevrolet Trailblazer came in with a clicking sound under the driver’s side of the dash and erratic control of heat and a/c, hot and cold, air from the driver’s side of the dash. To find the actual site of the clicking noise, I had to remove some of the underside of the dash. … Continue reading “2002 Chevrolet Trailblazer, Poor Heat, Clicking Sound Under Dash”
Last of a three part post on Chevrolet and GMC full sized truck and suv blower issues. The best place to start testing is at the blower motor. Key on and blower set to high. Check for power on the purple wire and ground on the black wire. If power is missing on the purple … Continue reading “1997 GMC C1500 Pickup, No Blower Part 3”
Second part of a multi-part repair post on GM truck blower systems. The blower resistor and the blower relay are located on top of the heater case. Behind the glove box. After opening the glove box, there may be two retention systems present. Sometimes there are plastic cables that are attached to the sides of … Continue reading “1997 GMC C1500 Pickup, No Blower Part 2”
This 1997 GMC C1500 came in for some other a/c service and I asked the customer about the blower working. He said it worked fine and asked why I wanted to know. I told him of the endless requests that I get for information on the blower systems on these trucks and how I wanted … Continue reading “1997 GMC C1500 Pickup, No Blower Part 1”
This 2003 Chevrolet Trailblazer came in with the complaint that the blower would not work on any speed and that the Brake and ABS lights stay on. Since I have seen this problem before, I knew right where to go to test. then ignition switch. The first thing that has to be done is to … Continue reading “2003 Chevrolet Trailblazer, Blower Not Working Any Speeds, Brake & ABS Lights On”
This 1999 Chevrolet Suburban came in with the complaint of an erratic speedometer. I have seen this problem before, so I went straight to the positive battery cable connections. This is what I found. At first the cables look a little corroded but not too bad. A closer look shows heavy corrosion on the terminal … Continue reading “1999 Chevrolet Suburban, Erratic Speedometer Caused by Burnt Battery Terminal”
This 2002 GMC Sierra came in with charging system complaints that I showed the repair for in an earlier post. Now I want to show how the whole situation could have been avoided if the installer had followed simple instructions. To see that repair please click here. If you recall the owner had installed electric … Continue reading “2002 GMC Sierra, Installing a Fused Battery Lead”
This 2002 GMC Sierra came in with the complaint that the battery had gone dead and that the voltmeter was reading low voltage at times. I opened the hood and the problem was quite evident to me but I decided to do some testing anyways. The following picture shows 14.32 volts at the alternator output … Continue reading “2002 GMC Sierra, Erratic Charging Condition, Battery Goes Dead”
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 2002 Chevrolet Suburban came in with the complaint that the radio fuse would blow. The fuse is in the driver’s side interior fuse box. I installed a new fuse and sure enough it blew when I switched the ignition on. I checked my wiring diagrams and found on this particular vehicle there was only … Continue reading “2002 Chevrolet Suburban, Radio Fuse Blows”