5 Things That Break on GMT800 Chevy, GMC Trucks & How to Fix Them
GMT800 generation of pickups and SUVs is generally very reliable, but they still experience some annoying problems.
The GMT800 generation of Chevy and GMC trucks and SUVs is every bit as popular today as it was years ago when these vehicles were sold new. In the years since these trucks ended production, they’ve developed a reputation for being rather reliable, but like every other vehicle on the planet, there are still a few things that will inevitably break or need to be repaired at some point. Luckily, this video from YouTuber Lawrence Tolman outlines five common problems with the GMT800 and details how to fix them.
The first issue detailed in the video was discovered by Tolman on his own pickup when he noticed that the carpet on the passenger side was frequently damp. After doing a little diagnostic work, Tolman discovered that water was entering the cab from where the third brake light and air vents are located. Turns out, the foam seal behind these parts had worn out, so they needed to be replaced. In this case, Tolman opted to use silicone to seal them up instead of replacing the gaskets.
Next, Tolman moves on to replacing a few other broken bits and pieces including the antenna mast, an ambient light sensor for the dashboard (which will cause the headlights to stay on all the time), and a set of spacers designed to prevent the seat from “clunking back and forth.” Whenever Tolman hits the brakes, the seat moves forward, and when he hits the gas, it moves backward, creating a pretty annoying problem.
That last repair is a bit time-consuming, unfortunately, as you must remove the seats, take the tracks apart, disassemble the adjusters, and replace the washers, but it isn’t anything terribly difficult to do. After walking us through that process, Tolman covers the broken knobs on his factory radio, which were replaced with some new parts from Amazon. Replacing the factory antenna mast is as easy as one might imagine, while the ambient light sensor requires removing the radio or upper dashboard to access.
One could argue that these little problems aren’t even worth fixing, but they’re annoying enough to spend a few bucks and a weekend taking care of, in our opinion, especially since the repair processes are neatly outlined in this extremely helpful video.
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