The GM Service Guy

DC fast charging session that won't start, stalls partway through, or crawls along slower than it should? Here's how to work through the most common causes on Bolt EV and...

Own a Chevy Bolt EV or EUV? Here's a clear breakdown of the well-known high-voltage battery fire recall, what caused it, and what to check on your specific vehicle.

A ticking noise from the engine bay that's louder when cold and quiets down as the engine warms up? A cracked exhaust manifold is one of the most common causes...

Loud roar the moment you start your truck? Catalytic converter theft has become a widespread problem for full-size GM trucks and SUVs specifically. Here's why, and how to protect yours.

Check engine light with a P0442 or P0455 code? These point to an EVAP system leak — and often the cause is simpler (and cheaper) than owners expect.

Fan only works on high, or not at all on certain settings? A failed blower motor resistor is one of the most common, most affordable HVAC fixes there is.

Losing refrigerant repeatedly on a 2014-2018 Sierra or Yukon? A known condenser weld-seam crack is one of the most common, well-documented causes.

AC blowing warm air, or a loud clutch engagement noise from under the hood? Here's how to work through a no-cold-air complaint before assuming a full compressor replacement.