FullsizeChevy

I restored the heavily oxidized OEM headlights on my 2007 Chevy Avalanche with staged wet sanding and a Meguiar’s G17804 coating. This guide separates what I actually did from the manufacturer’s application and safety instructions.

Bigger tires make a GMT800 feel gutless and throw off the speedo because they change your effective gearing. Here’s how to pick the right axle ratio to get it back.

Bought a GMT800 without the tow package? Here’s what it takes to add the trailer wiring, a brake controller and tow mirrors — and what you can’t retrofit without deeper changes.

Swapping the GMT800’s dim incandescent interior bulbs for LEDs is a cheap night-and-day upgrade. Here’s how to pick the right bulbs, keep the dash dimmer working, and avoid the flicker.

Cat-back, muffler swap or true dual? Here’s how to pick an exhaust for a GMT800 5.3 or 6.0 for the sound you want without the drone — and what power to realistically expect.

A GMT800 door that drops, clunks, or has to be lifted to latch has worn hinge pins and bushings. Here’s the cheap pin-and-bushing fix versus replacing the whole hinge.

A GMT800 brake line that pops on the pedal is a rust-belt classic and a safety issue. Here’s how to inspect them, replace them, and whether stainless or pre-bent lines are worth it.

Rusty cab corners and rockers are the GMT800’s worst body plague. Here’s the honest rundown of patch panels vs. bondo, weld-in vs. bolt-on, and how to do it so it lasts.