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I finally got the Tahoe on speed scanner and it turns out I had a faulty left front wheel speed sensor. Replaced the sensor and all of the issues are gone.

You might try and use an OBD/ABS scanner. It should give you a code which should point you in the right direction. Some auto part stores have scanners and will let you use it for a small fee or even free. I bought my own scanner from Harbor Freight and it worked and told me what code my...

I have an issue that is leaving me stumped. While in 2-HI, when I start out from a dead stop, at about 5-10 mph I hear a "groaning noise" under the dash on the left side. It is subtle but definitely there. At the same time I see a slight dip in the voltmeter and if the headlights are on the...

I had a somewhat similar issue with my 2005. My "Service 4WD" light would come on, I would get the switch showing 4H when I hadn't pressed anything, etc. etc. I tried two things to rectify it. First, I cleaned the grounds that I was told are the grounding wires to the 4WD electrics. They are...

I had the same problem with mine. I pulled the sensors and cleaned them and the problem went away.....

Hello All, Just purchased my first Tahoe, an '05 Z71. So far it is an awesome vehicle.......