10 Things to Look for And Avoid when Buying a Used Truck

Shopping for a used truck? Whether you’re looking for a rugged workhorse or a reliable daily driver, making the right choice is crucial. A used truck can be a great investment—but only if you know what to look for and what to avoid. From hidden mechanical issues to red flags in the vehicle’s history, knowing the right signs can save you from costly mistakes.

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At Phillips Buick GMC, we’re here to help you navigate the process with confidence. In this guide, we’ll break down 10 key things to check—and 10 pitfalls to avoid—when buying a used truck. Ready to find a quality truck you can trust? Let’s dive in, and when you’re ready, visit Phillips Buick GMC for expert guidance and a great selection of reliable pre-owned trucks!

1. Understanding Your Used Truck Options

Buying a used truck can save you money, but knowing what to look for is key. Trucks come in different sizes, trims, and conditions. Picking the right one takes research and a careful inspection.

Key Factors to Consider

Not all used trucks are the same. Some have been well cared for, while others may have hidden problems.

• Mileage – Lower miles often mean less wear, but service records matter more.
• Service history – A well-documented truck is a safer bet.
•  Previous use – Trucks used for heavy work may have more wear on the engine, brakes, and suspension.
• Accident history – Past repairs can affect long-term reliability.
• Trim levels – Some models offer better towing, comfort, or tech features.

Making the Right Choice

• Set a budget – Know what you can afford before you start looking.
• Compare models – Some trucks hold their value better and cost less to maintain.
• Check the title – Avoid salvage or rebuilt titles, as they can lead to costly repairs.
• Test drive before buying – Feel how it drives, brakes, and handles different road conditions.

A smart buyer looks beyond price. The right truck will fit your needs and last for years. At Phillips Buick GMC, we have a wide selection of used trucks at our Phillips Pre-Owned Powerhouse of used cars, trucks, and SUVs.

2. Prioritizing Reliability and Service History

A good truck should be reliable and built to last. Before you buy, take time to check its history and service records. A well-kept truck will save you money on repairs and keep you on the road longer.

Key Things to Check:

• Service Records: Look for regular oil changes, brake checks, and tire rotations. A well-documented history is a good sign.
• Accident Reports: Avoid trucks with major crash damage. Repairs may hide bigger problems.
• Ownership History: Fewer owners often mean better care. One-owner trucks tend to be in better shape.
• Recalls and Repairs: Check if past recalls were fixed. You can find this info using the VIN.

Red Flags to Avoid:

• Gaps in Service History – This could mean skipped maintenance.
• Flood or Salvage Title – These trucks often have hidden issues.
• Rust or Corrosion – Check the frame and undercarriage. Serious rust weakens the truck.
• Check Engine Light – If it’s on, get a full diagnostic report before you buy.

A truck like the Sierra HD, Sierra , or Canyon can be a great choice when well-maintained. Always take your time, do a full used truck inspection, and avoid deals that seem too good to be true. Need expert advice? Visit Phillips Buick GMC, and we’ll help you find a reliable truck you can trust!

3. Checking for Open Recalls Before Purchase

Before buying a used truck, check for any open recalls. A recall means the maker found a problem that needs fixing. If the truck has an unfixed recall, it could be a safety risk.

How to Check for Recalls:

• Use the VIN: Enter the truck’s Vehicle Identification Number (VIN) on the NHTSA website to see recall details.
• Ask the Seller: A trustworthy seller should tell you about any recalls and if they were fixed.
• Check Service Records: A well-kept truck should have proof that recall repairs were done.

Why This Matters:

• Safety Risks – Some recalls involve brakes, steering, or airbags. These problems can put you at risk.
• Costly Repairs – If a recall is not fixed, you might end up paying for it later.
• Resale Value – A truck with open recalls may lose value over time.

Models like the Sierra HD, Sierra , or Canyon are built strong, but even the best trucks can have recalls. Always do a full used truck inspection and avoid buying a truck with unresolved issues. Need help? Stop by Phillips Buick GMC, and we’ll guide you to a safe and reliable truck! Our Phillips Pre-Owned Powerhouse has a vast selection of vehicles to suit your individual needs.

4. Avoiding Unnecessary Modifications

Many used trucks come with aftermarket upgrades. While some changes improve performance, others can cause problems down the road. A truck with major modifications may have been pushed too hard or poorly maintained.

What to Watch For:

• Lift Kits – Raised suspensions can stress the frame, steering, and axles.
• Oversized Tires – Bigger tires change handling and can wear out parts faster.
• Engine Tuning – Some tuners boost power but put extra strain on the engine.
• Cut or Removed Exhaust Parts – These changes may not meet emissions rules and can lead to costly fixes.

Why It Matters:

• Reliability – Stock parts are built for long-term use. Heavy modifications can shorten a truck’s lifespan.
• Insurance Costs – Some insurers charge more or refuse coverage for modified trucks.
• Hidden Damage – Modifications may hide past abuse or off-road wear.

Trucks like the Sierra HD, Sierra , and Canyon are designed for strength and durability. A solid used truck inspection can help you avoid a bad deal. Looking for a truck with quality and dependability? Visit Phillips Buick GMC for expert advice!

5. Steering Clear of Air Suspension Systems

Air suspension may sound like a great feature, but it can lead to expensive repairs. These systems use airbags instead of traditional springs to adjust ride height. While they offer a smoother ride, they often wear out faster and cost more to fix.

Why Air Suspension Can Be a Problem

• Costly Repairs – Airbags, compressors, and sensors can fail, leading to expensive replacements.
• Leaks and Failures – Small leaks can cause the system to sag or stop working altogether.
• Tough to Maintain – More moving parts mean more chances for something to break.
• Less Towing Strength – Some setups reduce the truck’s ability to handle heavy loads.

What to Do Instead

• Choose Coil or Leaf Springs – These offer solid durability and require less upkeep.
• Check for Past Repairs – If a truck had an air suspension system replaced, ask why.
• Get a Professional Inspection – A trained technician can spot hidden suspension issues.

Strong, reliable trucks are built to last. When shopping for a used truck, picking one with a simple, well-built suspension is a smart move. Want expert guidance? Stop by Phillips Buick GMC for trusted advice and quality trucks!

6. Examining the Battery’s Condition

A weak or failing battery can lead to costly repairs. Before buying, check its age, charge level, and overall condition.

Signs of a Failing Battery

• Slow Engine Start – If the truck struggles to turn over, the battery may be weak.
• Corrosion on Terminals – White or green buildup can cause poor connections.
• Dim Lights or Electrical Issues – Flickering lights and weak power may signal a failing charge.
• Old Age – Most batteries last 3 to 5 years before needing a replacement.

How to Inspect a Battery

• Check the Date Code – Most batteries have a sticker with the month and year of manufacture.
• Test the Voltage – A healthy battery should read 12.6 volts or higher when fully charged.
• Look for Swelling – A bloated or cracked case means it’s time for a replacement.
• Start the Engine – Listen for slow cranking or clicking sounds that suggest a weak charge.

A strong battery means fewer headaches down the road. When in doubt, ask a professional to inspect it before you buy. Need expert help? Phillips Buick GMC is here to guide you to the right truck!

7. Identifying Signs of Water Damage

Water damage can ruin a truck’s electrical system and weaken its structure. Flooded vehicles often look fine on the surface, but hidden issues may appear over time.

Key Signs to Watch For

• Musty or Damp Smell – A strong odor inside the cab may mean past water exposure.
• Stained or Discolored Carpets – Uneven coloring or watermarks suggest past flooding.
• Rust in Unusual Places – Check under seats, inside the trunk, and around door hinges.
• Foggy Headlights or Taillights – Water trapped inside the lights could mean past leaks.
• Electrical Problems – Faulty power windows, flickering lights, or weak dashboard displays can be signs of water damage.

How to Inspect for Water Damage

• Lift the Carpet – Feel for damp spots or look for mold growth.
• Check the Drain Plugs – Missing or out-of-place plugs under the truck could mean someone tried to drain water.
• Look in the Engine Bay – Mud or debris in odd places, like air filters or under the hood, may suggest past flooding.
• Review the Vehicle History Report – A title marked “salvage” or “flood” is a big red flag.

A water-damaged truck can lead to costly repairs. Take your time to inspect carefully, and if you’re unsure, Phillips Buick GMC can help you find a truck that’s safe and reliable. With our Phillips Pre-Owned Powerhouse we have many used trucks for sale in Fruitland Park.

8. Assessing Suspension, Tires, and Brakes

A truck’s suspension, tires, and brakes affect its ride, handling, and safety. Worn parts can lead to costly repairs down the road. Before you buy, take a close look at these key areas.

How to Check the Suspension

A rough ride or strange noises may signal trouble. Look for these warning signs:

• Uneven tire wear – Could mean alignment or suspension issues.
• Excessive bouncing – Push down on the front and rear. If the truck bounces more than twice, the shocks may be bad.
• Leaking shocks or struts – Visible fluid near the suspension suggests worn parts.
• Clunking or creaking sounds – These noises may mean loose or damaged suspension components.

Inspecting the Tires

Tires keep the truck stable and improve traction. Make sure they are in good shape before buying.

• Tread depth – Insert a penny into the tread. If you see all of Lincoln’s head, the tires need replacing.
• Cracks or bulges – These can lead to blowouts.
• Matching tire brands – A mix of brands or different wear levels can affect handling.
• Proper inflation – Overinflated or underinflated tires wear out faster.

Checking the Brakes

Brakes keep you safe, so don’t skip this step. Watch for:

• Soft or spongy brake pedal – Could mean air in the system or worn brake fluid.
• Grinding or squeaking sounds – May signal worn-out brake pads or rotors.
• Vibration when braking – Warped rotors can cause shaking.
• Brake warning light – If the light is on, get a full brake inspection before buying.

A strong suspension, good tires, and reliable brakes mean a safer, smoother ride. If you’re unsure about a truck’s condition, Phillips Buick GMC can help you find one that’s in top shape.

9. Avoiding Trucks with “Lot Rot”

When a truck sits too long without use, it can develop hidden issues. This is called “lot rot.” Even if the vehicle looks fine, problems may lurk beneath the surface.

Signs of Lot Rot

A long stay in one place can cause wear and damage. Check for these warning signs:

• Dry, cracked tires – Rubber breaks down over time, leading to weak spots and potential blowouts.
• Dead or weak battery – Long periods without use can drain the battery.
• Rust or corrosion – Moisture buildup can eat away at metal parts, especially under the truck.
• Leaking fluids – Oil, coolant, or transmission fluid leaks may form when seals dry out.
• Stiff brakes – Rust can cause brake parts to seize, making them less effective.

How to Avoid Lot Rot Issues

A careful inspection can help you steer clear of these hidden problems.

• Check the tires – Look for cracks and check the tread depth.
• Test the battery – If the truck struggles to start, the battery may be weak.
• Inspect for rust – Look under the body and around wheel wells.
• Check fluid levels – Low or dirty fluids may indicate leaks or old parts.
• Take a long test drive – Drive at different speeds and on rough roads to check for hidden suspension or brake problems.

Sitting too long can cause more harm than miles on the road. A full inspection helps ensure you’re getting a truck that’s in great shape.

10. Getting a Professional Pre-Purchase Inspection

A used truck may look great, but hidden problems can cost you later. A professional inspection helps you avoid a bad deal.

If you are looking for more details, kindly visit BWHY.

Why a Pre-Purchase Inspection Matters

A trained expert can spot issues you might miss. They check key parts of the truck, ensuring it runs well and is safe to drive.

• Engine and transmission – Hidden leaks, worn belts, and shifting problems can lead to big repair bills.
• Brakes and suspension – Worn-out parts can make stopping or steering unsafe.
• Frame and undercarriage – Rust and damage may mean past accidents or long-term wear.
• Electrical system – Faulty wiring or a weak battery can cause trouble down the road.
• Tires and alignment – Uneven wear may signal past neglect or frame damage.

How to Arrange an Inspection

• Choose a trusted mechanic – Pick one with experience in trucks.
• Ask for a detailed report – A full list of issues helps you decide if the truck is worth it.
• Use the report to negotiate – If repairs are needed, ask for a lower price or have the seller fix them.
• Avoid sellers who refuse – If they won’t allow an inspection, the truck may have hidden issues.

A pre-purchase inspection is a small step that can save you thousands. It ensures you buy a truck that will last.

What warning signs indicate a used truck might have mechanical problems?

Warning signs include unusual engine noises, rough idling, excessive exhaust smoke, difficulty shifting gears, and leaking fluids.

How can I check for hidden damage or rust on a used truck’s frame?

Inspect the frame for rust, especially around wheel wells, undercarriage, and suspension mounts. Look for fresh paint or undercoating, which may hide damage.

Are there specific maintenance records or documents I should request?

Request service records, oil change history, accident reports, and any major repairs. A clean title and a vehicle history report are also important.

Find Your Perfect Used Truck at Phillips Buick GMC

Finding the right used truck takes time and research. If you’re in Leesburg, Yalaha, Rutland, Haines Creek, or Weirsdale, we can help. At Phillips Buick GMC, we offer a wide range of quality trucks, including the Sierra HD, Canyon, and Sierra .

Explore our used truck inventory or stop by our Phillips Pre-Owned Powerhouse today to find a reliable vehicle that fits your needs. Our team is here to answer questions and guide you through the buying process.

Maintaining your truck is just as important as choosing the right one. Learn more about the correct tire pressure for your GMC or why your vehicle might pull to one side. If you ever have trouble starting your truck, our guide on common reasons your GMC won’t start can help.

Visit our site to browse our selection or contact us today for expert advice on your next truck.

Drivers want diesel trucks for their dependability, durability, and solid fuel economy –huge monthly payments are less desirable. Diesel trucks can be expensive, with the ¾-ton and one-ton models being some of the priciest on the market. That’s why many owners buy used.

The key to finding a great deal on a used diesel truck is knowing what to look for, whether it’s in specific diesel truck parts, or specific diesel trucks from RAM, Ford, or General Motors. What you look at also depends on how you plan to use the truck. Let’s take a closer look.

Planning To Tow Heavy Loads?

If you want to use a diesel truck for heavy towing, then GM, Ford, and RAM trucks all have towing capabilities. For Ford, their Super Duty will have the greatest towing capabilities. Generally, newer trucks will have better towing capabilities. They have studier frames, better suspensions, and greater torque to assist with towing.

Don’t Judge Entirely On Miles

With diesel trucks, mileage isn’t everything; engine hours are important. Engine hours include idling time. One hour of idle time roughly translates to 25 miles of driving. For example, a used truck might only have around 100,000 miles, but with enough idle time, the truck’s true mileage could be over 300,000 miles.

It’s important to be aware of idle time when buying used service trucks. The truck’s oil change intervals should go by engine hours too. If you’re buying an older truck model, it may not include an engine hours meter.

A truck’s mileage can clue you into how well-maintained it is. Well-maintained diesel trucks are capable of reaching over 300,000 miles, so if the truck is still operating at a high mileage, it means it’s well cared for. Don’t discount a truck just because of its odometer.

Emissions Systems Issues

Trucks made after have more complex emission systems. During this time, EGR became a standard fixture on Ford 6.0L Powerstroke and GM LLY Duramax trucks. Because emission standards became stricter, most trucks -onwards also included a DPF (Diesel Particulate Filter).

Then in , many trucks also included a SCR (Selective Catalytic Reduction) system. These systems are sometimes responsible for reduced performance and breakdowns. Before committing to a used truck, be sure to check out its emissions system.

Frame Rust

Before buying, check a high-mileage truck for rust issues. Too much rust on the frame and body may give the truck structural problems. The truck’s location may clue you into potential rust issues.

Trucks from the Eastern US or Midwest are more likely to be exposed to road salt, which can deteriorate their body and frame. Trucks from the west and south may fare better. Some surface rust is to be expected on any truck but check the frame inside and out for any serious problems.

Maintenance Records

A used truck that’s been well-maintained will have a paper trail of service receipts. These receipts let you know the truck was given proper care. They’ll also let you know more about the truck’s services and if any diesel parts were replaced. Good records remove the guesswork out of truck shopping.

Tuned Trucks

With the breadth of aftermarket support for diesel truck parts and programming, owners can net more horsepower than ever before. Unfortunately, performance tuning has its share of drawbacks.

That extra pressure on your cylinder, boost, and drive, when sustained over thousands of miles, can blow your head gasket. This can be a problem with any tuned engine, but especially Duramax and Powerstroke engines.

Problems With The 6.0 Liter Powerstroke

While shopping, you may find plenty of - Ford Super Duty trucks with low prices. This low price may seem tempting, but these trucks frequently suffer EGR issues, plus issues with sticky turbos and plugged oil coolers. This truck’s high-pressure oil injection system isn’t as reliable as the 7.3L Powerstroke’s version either.

The 6.0 Powerstroke engine is salvageable if you’re a decent mechanic and you’re willing to put in the work. These trucks are sold cheap and can last a long time.

Beware Of LB7 Injectors

In the pre-emissions era, - trucks with the LB7 Duramax engine had unreliable fuel injectors. These injectors were prone to cracking and leaking, and they aren’t easy or cheap to replace either.

If you buy a LB7 Duramax within these model years, you’ll need replacement LB7 injectors eventually. If you’re looking at buying a LB7 Duramax truck, check if the injectors have already been replaced.

Chrysler Automatic Transmissions Concerns

If you want to buy a RAM truck with a Cummins diesel engine, avoid automatic transmissions from onward. This truck’s manual transmission is solid, but its automatic transmission is like a ticking time bomb. If the truck has already been used for heavy towing, the transmission may break even sooner than you think.

For more information, please visit Truck Engine.

Top 5 Tips For Looking At A Used Diesel Truck

1. Research truck models by their specific model year and their engines. This clues you into vehicle-specific problems to watch out for.
2. Check the emissions system health on any truck made in or later.
3. Check the truck’s frame for rust, especially if it’s from the Eastern or Midwestern U.S.
4. Maintenance records are a valuable tool that makes it easier to buy a used diesel truck.
5. Before buying any truck, it’s a good idea to have it fully inspected by a qualified diesel mechanic.