The GM Service Guy

Thermostat Maintenance Guide for GM Vehicles (Chevrolet, GMC, Buick & Cadillac) The thermostat is a small, inexpensive part — but when it fails stuck closed, it can turn into thousands...

Battery Replacement Maintenance Guide for GM Vehicles (Chevrolet, GMC, Buick & Cadillac) A weak battery doesn't just leave you stranded — it quietly puts extra strain on your alternator every...

Brake Fluid Flush Maintenance Guide for GM Vehicles (Chevrolet, GMC, Buick & Cadillac) Brake fluid is the one maintenance item on this list that's driven entirely by time, not mileage...

Coolant Flush Maintenance Guide for GM Vehicles (Chevrolet, GMC, Buick & Cadillac) GM's Dex-Cool has a reputation problem, but most of the horror stories trace back to skipped flushes and...

Differential Fluid Maintenance Guide for GM Vehicles (Chevrolet, GMC, Buick & Cadillac) Differential fluid is a classic "out of sight, out of mind" service — right up until a whine...

Transfer Case Maintenance Guide for GM Vehicles (Chevrolet, GMC, Buick & Cadillac) Transfer case fluid is easy to forget since most owners never look under a 4WD truck — but...

Transmission Service Maintenance Guide for GM Vehicles (Chevrolet, GMC, Buick & Cadillac) GM markets many of its automatic transmissions as "lifetime fill," but real-world shop experience tells a different story...

Spark Plug Maintenance Guide for GM Vehicles (Chevrolet, GMC, Buick & Cadillac) Spark plugs are a "set it and forget it" part for a long time — until they wear...