The silence that fills your inactive Chevy when you turn the key and it won't start can be extremely annoying. A Chevy that fails to start leaves you stuck on the side of the road trying to figure out the problem. Luckily, some common problems lead to Chevrolet TrailBlazer not starting, many of which can be fixed DIY or quickly by a mechanic.
In this comprehensive guide, we'll explore the top 14 causes your Chevrolet TrailBlazer doesn't start and offer helpful tips to get your car started again.
Drained or Dead Battery
The most common reason a Chevy won't start is a dead or drained battery. Your battery provides the initial jolt of electricity to turn over the engine and get it started.
Signs of a dead battery:
- Silence upon turning the key – no engine cranking
- Electronics not powering on
- Difficulty starting in cold weather
The Fix: Keep jumper cables on hand for a dead battery emergency. Jump starting your Chevy TrailBlazer using a good battery or jump box can deliver enough charge to get it started.
You can also clean corroded battery terminals if they prevent a good connection. If problems continue, have your battery tested – it may need replacing if old.
If your battery tests fine but your Chevy TrailBlazer still won't crank, the culprit may be a faulty alternator. This vital part charges your battery while driving and powers the electronics.
Clues of a bad alternator:
- Battery warning light coming on
- Electronics dimming
- Hard time starting, especially after short trips
The Fix: Get your alternator checked ASAP by a mechanic. A bad alternator can rapidly deplete your battery. This will need to be replaced by an experienced mechanic.
Faulty Spark Plugs
Spark plugs ignite the fuel/air mixture in the cylinders to run your car. When they are fouled or worn out, your TrailBlazer may not start due to no spark.
Clues of bad spark plugs:
- Poor fuel economy
- Rough idle
- Engine hesitating
The Fix: Spark plugs need regular replacement as they degrade. Most last 30k+ miles. Have your plugs checked and change any bad ones. Using quality gas helps avoid buildup.
Ignition System Issues
Issues with ignition components like the switch, lock cylinder, fob, or wiring can prevent your Chevrolet from cranking.
Signs of ignition trouble:
- No noise upon turning key
- Instrument panel flickering
- Key won't turn
The Fix: For fob issues, replace the battery. For other problems, have the system diagnosed and repaired professionally. If you need a new Chevy key fob you can get one online here.
The starter motor engages when you turn the key to crank the engine. If it's damaged, your Chevy TrailBlazer may not crank.
Signs of a bad starter:
- No noise upon turning key
- Clicking but no cranking
- Unusual noises
The Fix: Have your starter tested and replaced if faulty. This requires the help of a professional mechanic to diagnose and repair.
Not in Park or Neutral
If your transmission isn't in Park or Neutral, your Chevy's safety features will prevent it from cranking.
The Fix: Shift into Park/Neutral and try once more. If it only starts in one gear, you may have a faulty neutral safety switch needing repair. This will need to be repaired by a local mechanic near you.
Blocked or Clogged Fuel Filter
A clogged fuel filter can constrain fuel delivery to the engine, preventing your Chevy TrailBlazer from starting.
Signs of a clogged filter:
- Difficulty starting
- Engine sputtering
- Decreased fuel economy
The Fix: Replace the filter per your schedule or if thought clogged. Use quality gas and change often. You can have a local mechanic repair this for you, or repair it yourself, maybe with the help and guidance of an online mechanic.
Faulty Fuel Pump
The fuel pump delivers gas from the tank to the engine. If it fails, your Chevrolet won't start due to no fuel.
Signs of a bad pump:
- No sound upon turning key
- Difficulty starting
- Stalling after starting
The Fix: Have your pump tested. If faulty, a mechanic near you will need to replace it.
Low Engine Compression
Proper compression is needed to combust the air/fuel mixture. Low compression from worn parts can lead to a no start.
Symptoms of compression issues:
- Hard time starting
- Rough idle
- Lack of power
The Fix: Testing can confirm low compression. For diagnostics and carrying out this repair, a local mechanic is usually needed and will have to replace the worn engine components.
Broken Timing Belt
The timing belt keeps the camshaft and crankshaft. If it snaps, the valves and pistons won't be timed properly and your Chevy TrailBlazer won't start.
Signs of a bad timing belt:
- No start
- Unusual ticking noise
The Fix: Have your belt checked and fixed right away if broken. This requires a local professional mechanic to replace the timing belt of your Chevy TrailBlazer.
Detached or Loose Battery Cable
Signs of a bad cable:
- Corroded terminals
- Power loss from wiggling cables
- Frayed wiring
The Fix: Scrub corroded terminals and tighten loose connections. Damaged cables need replacement. You can get expert Chevy mechanic advice and guidance online or with a local mechanic.
Relays control power to components like the starter, fuel pump, and computer. Failure can prevent your Chevy TrailBlazer from starting or running right.
Identifying relay problems:
- Swap relays to test
- Have relays checked by a mechanic
The Fix: Faulty relays must be replaced, often after a larger diagnostic. You will likely need a local mechanic to diagnose if the faulty relay is preventing your Chevy from starting.
Low Fuel or Empty Tank
Running your tank bone dry can cause a no-start due to lack of fuel. This seems obvious however it often happens because of an inaccurate or broken fuel gauge.
The Fix: Keep your tank at least 1/4 full to avoid unexpected emptying. If issues persist, have your fuel sender unit checked by a professional mechanic.
Sometimes an engine can flood with too much fuel, preventing starting due to wet spark plugs. This is most common in older carbureted engines.
The Fix: Press the gas pedal fully and crank briefly to clear the system so the plugs can spark. If problems continue, have the carburetor adjusted by a professional local mechanic.
Top 3 Ways To Get a Mechanics Help
With so many potential causes for a no start problem, it can be tough to determine the exact issue yourself. In some cases, using help from an experienced mechanic can save you time and give you peace of mind.
These are the 3 ways to get a mechanic's help in starting your Chevy again.
1. Local Auto Repair Garage Near You
This is the regular way to get it repaired, however, it can be very wasteful in time and money, transporting your vehicle to them, plus expensive garage fees as they often have expensive overhead costs etc, that they have to pass on to the customer.
2. A Mobile Mechanic Near You
Having a qualified mobile mechanic come to your Chevy and repair it on-site can be a great time and money saver. The best mobile mechanics we can recommend in the USA are RepairSmith and YourMechanic. We have recommended them thousands of times, and they both have great prices, services and coverage across most of the USA.
In the UK the best mobile mechanic we can recommend is Fixter, they will come pick up your car, take it get repaired, and deliver it back to you. You can get an instant free quote on their official websites by clicking the name. We have tested, vetted, and can heartedly recommend each of these services to get your Chevy TrailBlazer|Chevrolet TrailBlazer starting again ASAP.
3. Chat with a Chevy Mechanic Online
This is a fantastic possibility for most DIYers or car enthusiasts. It's frequently an easy fix you can do on your own, like switching out or charging the battery. In these cases, if you are aware of what to do in a stepwise fashion, you can do it yourself, you don't need to pay a mechanic on-site. Alright, it's your fortunate day, an online mechanic can supply all the help, advice, and advice you need, instantly by online chat. You can then execute the simple fix on your own.
The top online mechanic we propose is JustAnswer, and through our link, you can get a trial of their assistance for just $5, ask unlimited questions for a week, get the assistance you require, and you are not obligated to continue the service after that. We love JustAnswer for this reason, specialist auto mechanic help for just $5 is an unbeatable price.
The licensed mechanics at JustAnswer's Ask a Mechanic service are ready 24/7 to provide virtual troubleshooting and recommendations. The advantages of querying a mechanic online are:
- Convenience: Get help from home without having to schedule an appointment or wait at a shop.
- Fast answers; Mechanics respond quickly with potential reasons and solutions based on your description.
- Cost savings: Pay per question rather than full diagnostic fees – great for basic troubleshooting.
- Documentation: All conversations are recorded in writing, providing helpful reference.
- Expert knowledge; Experienced licensed mechanics have the expertise to address Chevy TrailBlazer|Chevrolet TrailBlazer no starting issues with ease.
You will get matched with the best auto mechanic for your particular case, it doesn't matter if it's a TrailBlazer or your Chevrolet Trans Sport won't start, the expert Chevy mechanic you are paired with, will be the best for the job.
So next time you find yourself searching online for something like “my Chevrolet wont start but clicks“, consider our speak to a Chrevrolet mechanic online free service. In just minutes, you can leverage expert Chevrolet knowledge to help get your beloved TrailBlazer started again.
FAQs (Frequently Asked Questions)
Why is my Chevy car not starting but I have power?
If your Chevrolet won't start but the lights and electronics power on, the most likely culprits are problems in the starter system, ignition switch, or neutral safety switch. Defective ignition components prevent the engine from cranking even when battery power is present.
Why does my Chevy have power but won't turn over?
When your Chevy has power to the lights and accessories but won't crank when turning the key, the problem is often a bad starter system or related wiring issue. This prevents the starter from engaging to turn the engine over for starting.
What would make my Chevy car unexpectedly not start?
Sudden no-start issues can occur from disconnected battery cables, fuel pump or relay failure, broken timing belt, or an empty gas tank. These critical issues can arise without warning and prevent your Chevy's engine from starting.
Why doesn't my Chevy car start but the battery is fine?
With a good battery, the problem may be a bad alternator not charging the system, bad spark plugs providing no ignition, or a fuel delivery problem preventing combustion. Your Chevy's engine needs air, fuel, compression and spark to run.
What are signs your Chevy starter is bad?
Symptoms of a bad starter include no noise when turning the key, a single click but no cranking, unusual grinding sounds, and slow/labored cranking. These indicate starter failure and the need for replacement by a local mechanic.
Why doesn't my Chevy car start but battery and alternator are good?
If the battery and alternator check out, common culprits are bad spark plugs, clogged fuel filter, blown fuse, immobilizer issue, and starter relay failure. Thorough diagnostics of all electrical and fuel systems are needed by a qualified local mechanic.