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 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 2004 GMC Envoy came in with the passenger side low beam not working. This repair applies generally to Envoys, Bravadas and Trailblazers, with only slight differences in the headlight assembly removal. Some require removing the grill assembly. This one is pretty simple though. Pull the retainers straight up. You can use just you fingers. … Continue reading “2004 GMC Envoy, Low Beam Headlight Inop”
This 2006 GMC Sierra came in with multiple problems related to being struck by lightning. It was only during the process of repairing other systems that I noticed that the glass in the driver’s side mirror was etched with actual lightning bolts. I personally think it is kind of cool to have a physical recording … Continue reading “2006 GMC Sierra, Changing the Driver’s Outside Mirror”
This 2000 GMC Jimmy came in with the complaint of no dash lights at night. This is actually pretty easy to test and repair. First turn the park lights on and check to make sure the exterior park/tail lights are working. These were on this vehicle. Next check for power on the ILLUM fuse in … Continue reading “2000 GMC Jimmy, No Dash lights”
This 2002 GMC Yukon came in with the complaint that the lights on the rear of the truck were working sometimes and sometimes not. The customer had only complained about the turn signals but in testing I found that different lights on both sides were not working properly. I figured it had to be a … Continue reading “2002 GMC Yukon, Tail , Stop, Turn and Reverse Lights Inop”
This 2003 GMC Envoy came in with the complaint that the passenger side low beam would not work. The customer further stated that they had tried to replace a burnt socket. Well let’s pull the light assembly out and see what kind of mess we have. There are two retainers that have to be lifted … Continue reading “2003 GMC Envoy, Low Beam Headlight Inop”