Hummer (GMC Hummer EV) H2 problems
Common Hummer (GMC Hummer EV) H2 problems: engine, gearbox, suspension and electrics. Causes, what to check first and estimated repair cost.
Why Your Hummer H2's ABS Light Stays On (And What to Check First)
A steady ABS light on a Hummer H2 is usually a wheel speed sensor, its wiring, or a rusted tone ring. Here is what to check first and when it is still safe to drive.
Electrics & sensorsHummer H2 Battery Drain Overnight? Here's How to Find the Parasitic Draw
If your Hummer H2 won't start in the morning, a parasitic electrical draw is the likely culprit. Learn the top causes, what to check first, and if it's safe to drive.
Engine & fuel systemHummer H2 Flickering Check Engine Light and Rough Idle: What to Do
A flickering check engine light with a rough idle usually means an active misfire. On a gas Hummer H2, diagnose ignition, vacuum leaks, and fuel delivery first.
Engine & fuel systemHummer H2 Cold-Start Stall in Winter: Causes and What to Check First
A cold-start stall on a Hummer H2 is usually a sensor, fuel, or throttle-body issue. Here's what to check first and when to park it.
Suspension & brakesHummer Brake Pedal Pulsation: Warped Rotors or Something Else?
A pulsating brake pedal on your Hummer often means warped rotors or uneven pad deposits. Here’s what to inspect first and when it’s safe to keep driving.
Suspension & brakesHummer H2 Front Suspension Clunk: Causes, First Checks, and Is It Safe to Drive?
A clunk from the front of your Hummer H2 over bumps is usually worn sway bar links, control arm bushings, or ball joints. Here's what to check first — and when to park it.
Transmission & gearboxHummer H2 Transmission Slipping Between Gears: Delayed, Jerky Shifts Explained
A delayed, jerky engagement between gears on a Hummer H2 usually points to low or burnt ATF, a tired valve body or shift solenoid, or worn clutch packs. Here's how to narrow it down — and how long it's safe to keep driving.
Transmission & gearboxHummer H2 Humming or Whining at Highway Speed: Gearbox Noise Explained
A steady hum or whine from your H2 at highway speed is usually fluid, bearing, or gear wear in the transmission, transfer case, or differential. Here is how to narrow it down, what to check first, and when it is still safe to drive.