What to Look For When Buying a Used Truck
A practical checklist for buying a used truck - 10 specific things to look for at the lot that most buyers skip, from frame rust to tire wear patterns.
Most people walk around a used truck, look at the paint, glance at the interior, and take it for a test drive. That's a start - but it's not enough. A truck that looks clean on the surface can be hiding things that will cost you real money. Here's what to actually check before you leave a deposit.
1. Get Underneath and Look at the Frame
This is the most important step, and most buyers skip it entirely. Crawl underneath or use your phone camera and look at the frame rails. What you're looking for: heavy surface rust beyond light oxidation, rust at the frame joints and crossmembers, welding patches that weren't factory, or evidence of straightening from a prior impact.
Southern trucks should have clean frames. If you see heavy rust on a truck sold in south Mississippi, it came from somewhere with road salt - and it's been through winters that this area doesn't see.
2. Cab Corners and Rocker Panels
The cab corners - the metal at the bottom rear of each door opening - are a common rust point, especially on late-2000s and early-2010s GM half-tons. Press on the seam with your thumb. If it flexes, feels soft, or sounds hollow, there's rust under the paint or body filler hiding a repair.
3. The Tow Hitch - What It Tells You
Look at the receiver hitch. Heavy gouging, cracks at the receiver weld, or a bent ball mount tell you the truck worked hard. Check the factory trailer wiring harness at the back - frayed or corroded plugs are a sign of regular use and deferred maintenance.
4. Pull the Transmission Dipstick
Transmission fluid should be reddish-pink and clear, or at least pinkish with no burnt smell. Brown, dark fluid with a sharp burnt odor means fluid changes were deferred. Ask when the fluid was last changed and whether there are service records to back it up.
5. Start It Cold and Listen Before You Drive
A cold start is when engine problems announce themselves. Turn the key, then sit and listen for 30-45 seconds before touching anything else. A tick that persists after the engine is fully warm - especially on GM trucks with the 5.3L V8 - is the AFM lifter issue. That repair is $2,000-$4,000.
6. The Bed Liner - What's Underneath It
Spray-in and drop-in bed liners are good for protecting the bed floor. They're also good at hiding rust in the corners and wheel wells. Knock on the liner in the bed corners and around the wheel well openings. If it sounds hollow or feels soft in spots, look closer.
7. Tire Wear Pattern - Read the Alignment History
Wear only on the inside or outside edge means alignment has been off. Feathered or cupped wear, where the tread looks scalloped, points to worn shocks or struts. Factor in the cost of alignment and tire replacement if the wear is uneven.
8. Apple CarPlay and Android Auto
1,000 done right. If CarPlay or Android Auto is on your list, make sure it's already there.
9. Test the AC Thoroughly
Do not assume the AC works until you've run it for five full minutes on max cold. Feel the vents for actual cold air. Listen for any unusual compressor noise when the AC kicks on. An AC system that barely works in March will leave you stranded in July.
10. Engage Four-Wheel Drive Through Every Range
Test all ranges before you leave the lot: 2WD, 4-Hi, and 4-Lo. It should engage cleanly with no grinding, hesitation, or warning lights. If the dash lights up when you try to shift, that's a repair.
At Dykes Motors in Collins, MS, we go through all of this before anything hits our front line. CARFAX on every truck, shop inspection before it goes on the lot. Call us at (601) 641-5475.