GM Repair Guides

A frozen touchscreen, a radio that won't turn on, or a stereo that randomly reboots is one of the most common complaints GM owners bring to us. The infotainment system...

The thermostat is a small, inexpensive part — but when it fails stuck closed, it can turn into thousands of dollars in engine damage within minutes if ignored. Overview &...

An engine misfire can come from a dozen different root causes — spark, fuel, compression, or even a bad sensor feeding the computer wrong information. Here's how to work through...

GM's 6.2L L86 and L87 V8s share the same variable-displacement lifter technology as the 5.3L — and the same failure mode, which has been serious enough that GM has replaced...

Low oil pressure is one of the few engine problems that genuinely can't wait — running an engine on inadequate lubrication risks turning a moderate repair into a total rebuild....

A dirty throttle body is one of the cheapest fixes for a rough idle or hesitating GM engine, and one of the most overlooked pieces of routine maintenance. It is...

A rear main seal leak is one of the most expensive "small parts, big labor" repairs on a GM vehicle — the seal itself costs almost nothing, but reaching it...

A leaking valve cover gasket is one of the most common oil leaks on GM engines — and if left alone long enough, it can start fouling spark plugs and...

Active Fuel Management is GM's cylinder-deactivation system for improving fuel economy on the 5.3L V8 — but when the specialized AFM lifters fail, the repair bill can escalate quickly if...

That cold-start tick coming from your 5.3L is one of the most common complaints on GM trucks and SUVs — and one of the most misdiagnosed. Here's how to tell...

If you own a GM or Chevrolet truck or SUV with a 5.3L or 6.2L V8, you've probably heard of the lifter problem. It's one of the most talked-about issues...

If you're buying a used GM truck or SUV — or you've got a higher-mileage vehicle and you're wondering how much life is left in the transmission — this guide...

Transmission problems are some of the most anxiety-inducing issues a GM or Chevrolet owner can face. Whether you're driving a Silverado, Equinox, Tahoe or Traverse, transmission trouble can range from...

Sweet smell near your engine and a puddle under your 2020 Chevy Trax? Learn what causes a coolant leak, where it's most likely coming from, and what to do before...