The GM Service Guy

Airbag warning light staying on, or wondering what a seatbelt pretensioner actually does? Here's how the SDM monitors your vehicle's restraint system and what to do when something's flagged.

Seat that won't recall your saved position, or a seat heater that's stopped working (or won't stop)? Here's how to work through both common seat module problems.

Water dripping from the headliner or pooling on the floor after rain or a car wash? A clogged sunroof drain tube is one of the most common, most overlooked causes.

Power tailgate or liftgate moving slowly, stopping partway, or not responding at all? Here's how to work through the most common causes on Silverado, Sierra, Tahoe, Yukon, and Suburban.

Rear end sagging overnight, a rough ride, or a compressor that runs constantly trying to keep up? Air ride suspension leaks and compressor failure are a well-known issue on these...

Your EV won't wake up even though the high-voltage battery shows plenty of range? That's a separate, smaller 12-volt battery problem — and it's more common than most EV owners...

Infotainment freezing, features not loading, or charging sessions behaving unpredictably on your Equinox EV or Blazer EV? Software issues have been a notable early theme on both.

Water dripping into the cabin of your Hummer EV around the removable roof panels? This is a documented issue with a known service fix.