2008 GMC Sierra Denali, Multiple Electrical Problems

This 2008 GMC Sierra Denali came in with multiple electrical complaints. The blower did not work. The left side stoplight, all left side turn signals, the right side mirror turn indicator. All of the power windows except for the right rear window did not work. There were a multitude of codes scattered through various modules. … Continue reading “2008 GMC Sierra Denali, Multiple Electrical Problems”

2008 GMC Yukon, Reduced Power Mode, Code P0641 00 Stored

This 2008 GMC Yukon came in with the complaint of reduced power and the vehicle could not be driven over about 35 mph. There were a lot of codes stored but the only one of real relevance was Code P0641 Symptom 00, 5 volt reference circuit 1.  I looked at data under the TAC section … Continue reading “2008 GMC Yukon, Reduced Power Mode, Code P0641 00 Stored”

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”

1994 Chevrolet C3500, Replacing A Damaged Fusible Link

This 1994 Chevrolet C3500 came in with a ton of problems. In the process of wrapping things up I wanted to show how to replace a damaged fusible link. First of all so many people think that the white (sometimes black) plastic piece is the fusible link. It is not. The fusible link is the … Continue reading “1994 Chevrolet C3500, Replacing A Damaged Fusible Link”

2002 Chevrolet Malibu, Power Outlet Not Working

This 2002 Chevrolet Malibu came in with a simple enough complaint. The power outlet in the dash did not work. Simple enough. I went to fuse number 34 in the underhood fuse box to check the fuse. Why is there a 2 amp fuse when there should be a 20 amp fuse? Why is it … Continue reading “2002 Chevrolet Malibu, Power Outlet Not Working”

2002 Chevrolet Tahoe, BTSI Fuse Blows

This 2002 Chevrolet Tahoe came in with multiple complaints so there will be several repairs on this vehicle. The first one deals with the BTSI fuse blowing in the under hood fuse box. I am pointing to the fuse in the picture below. The blown fuse next to the location on the fuse box legend. … Continue reading “2002 Chevrolet Tahoe, BTSI Fuse Blows”

1998 Chevrolet K1500, Right Rear Turn Signal Erratic

Well, I got to see something new today. The customer brought this 1998 Chevy K1500 in with the complaint that the right rear turn signals would not work with the park lights on. I thought no big deal, the right rear socket board has weak internal ground. Seen it a hundred times if I have … Continue reading “1998 Chevrolet K1500, Right Rear Turn Signal Erratic”

2004 Chevrolet Tahoe Multiple Problems, No Communication

This 2004 Chevrolet Tahoe came in with a multitude of complaints. Some of the complaints were that it might not start, the power windows would stop working, the door locks would cycle, the radio would stop working, the instrument cluster gauges would stop working and  multiple warning lights would come on. From a technical perspective … Continue reading “2004 Chevrolet Tahoe Multiple Problems, No Communication”

2002 Chevrolet Suburban, Radio Fuse Blows

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”

1999 Chevrolet Tahoe, ECM 1 Fuse Blows

This 1999 Chevrolet Tahoe came in with a complaint that the ECM 1 fuse in the under hood fuse box would blow, which of course causes a no run condition. Usually five to ten minutes after a cold start. That in itself is enough of a clue to me to start looking around the exhaust … Continue reading “1999 Chevrolet Tahoe, ECM 1 Fuse Blows”