Chevrolet Blazer Won’t Start: Top 14 Causes & Solutions

Turning the ignition and getting only silence instead of the engine cranking over is incredibly frustrating when you're sitting in your motionless Chevy. A Chevy that fails to start leaves you immobilized and uncertain about the cause. The good news is that a number of familiar culprits make a Blazers fail to start, and you can fix a lot of them yourself or with a mechanic's assistance.

In this comprehensive guide, we'll explore the fourteen most common reasons your Chevrolet Blazer won't start and offer helpful suggestions to get your car started again.

Drained or Dead Battery

The most common cause a Chevrolet doesn't crank is a dead or weak battery. Your battery supplies the initial jolt of electricity to turn over the engine and get it running.

Indications of a dead battery:

• Silence upon turning the key – no engine cranking
• Accessories not powering on
• Difficulty starting in cold weather

How to Fix It: Keep jumper cables on hand in case of a dead battery situation. Jump starting your Chevrolet Blazer using another vehicle or jump box can deliver enough charge to get it cranked.

You can also try cleaning corroded battery terminals that are blocking a good connection. If problems continue, have your battery tested – it may need recharging if worn out.

Faulty Alternator

If your battery tests fine but your Chevy Blazer still won't crank, the culprit may be a bad alternator. This key component charges your battery when running and powers the electronics.

Signs 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 quickly drain your battery. This will need to be replaced by an experienced mechanic.

Bad or Fouled Spark Plugs

Spark plugs fire the fuel/air mixture in the cylinders to power your car. When they are fouled or worn out, your Blazer may not start due to no spark.

Signs 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 faulty ones. Using quality gas helps avoid buildup.

Ignition Problems

Issues with parts like the switch, lock cylinder, fob, or wiring can prevent your Chevy from starting.

Symptoms of ignition trouble:

• No noise upon turning key
• Instrument panel malfunctioning
• 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.

Bad Starter

The starter motor engages when you turn the key to crank the engine. If it's worn out, your Chevy Blazer may not crank.

Symptoms of a bad starter:

• No noise upon turning key
• Clicking but no turnover
• Unusual grinding or whining

The Fix: Have your starter inspected and repaired if faulty. This requires the help of a professional mechanic to diagnose and repair.

Transmission Not in Park/Neutral

If your transmission isn't in Park or Neutral, your Chevrolet's safety features will prevent it from starting.

The Fix: Shift into Park/Neutral and try again. 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.

Clogged Fuel Filter

A clogged fuel filter can constrain fuel flow to the engine, preventing your Chevrolet Blazer from turning over.

Signs of a clogged filter:

• Hard time starting
• Engine sputtering
• Decreased fuel economy

The Fix: Replace the filter per your schedule or if thought clogged. Use quality gas and replace 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.

Symptoms of a bad pump:

• No sound upon turning key
• Difficulty starting
• Stalling when running

The Fix: Have your pump tested. If faulty, a mechanic near you will need to replace it.

Compression Issues

Proper compression is required to combust the air/fuel mixture. Low compression from worn parts can lead to a no start.

Signs of compression issues:

• Difficulty 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 breaks, the valves and pistons won't be timed properly and your Chevrolet Blazer won't start.

Signs of a bad timing belt:

• No start
• Unusual clicking sound

The Fix: Have your belt inspected and replaced immediately if broken. This requires a local professional mechanic to replace the timing belt of your Chevy Blazer.

Detached or Loose Battery Cable

A loose battery cable can block electricity flow in your Chevrolet. This common problem can prevent starting.

Symptoms of a bad cable:

• Corroded terminals
• Power loss from moving cables
• Frayed wiring

The Fix: Clean 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.

Faulty Relays

Relays control power to components like the starter, fuel pump, and computer. Failure can prevent your Chevy Blazer from starting or running right.

Diagnosing 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 completely empty 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.

Flooded Engine

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 flush 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 issue, it can be difficult to identify the exact problem yourself. In some cases, getting help from an experienced mechanic can be time-saving 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 Blazer|Chevrolet Blazer starting again ASAP.

3. Chat with a Chevy Mechanic Online

This is a superb option for most DIYers or car enthusiasts. It's frequently  a straightforward fix you can do on your own, like changing or recharging the battery. In these situations, 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 locally. Alright, it's your lucky day, an online mechanic can provide all the assistance, guidance, and advice you need, immediately by online chat. You can then execute the straightforward repair on your own.

The best online mechanic we propose is JustAnswer, and through our link, you can get a free trial of their service for just $5, inquire unlimited inquiries for a week, get the assistance you require, and you don't have to keep going with the service after that. We adore JustAnswer for this reason, expert auto mechanic assistance for just $5 is an unbeatable price.

The qualified mechanics at JustAnswer's Ask a Mechanic service are available 24/7 to provide virtual troubleshooting and recommendations. The advantages of asking a mechanic online include:

• Convenience: Get help from home without having to schedule an appointment or wait at a shop.
• Fast responses; Mechanics respond rapidly with likely issues and solutions based on your description.
• Cost savings: Pay per question rather than full diagnostic fees – great for basic troubleshooting.
• Documentation: All conversations are logged in writing, providing helpful reference.
• Expert help; Skilled licensed mechanics have the knowledge to address Chevy Blazer|Chevrolet Blazer 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 Blazer or your Chevrolet C/K 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 “Chevy starting problems“, consider our Chrevrolet mechanic online service.  In just minutes, you can get expert Chevrolet knowledge to help get your beloved Blazer fired up again.

FAQs (Frequently Asked Questions)