* Fuel Pump Issues: The fuel pump relies on fuel to lubricate itself. Running dry can damage the pump, leading to failure. This is the most common reason.
* Air in the Fuel Lines: When the tank is empty, air can enter the fuel lines. The fuel pump may struggle to prime the system and get fuel flowing again. This usually resolves itself after some time, but not always.
* Clogged Fuel Filter: Running out of gas can dislodge debris that clogs the fuel filter.
* Distributor Issues (if applicable): While less likely, it is possible that the ignition system is unrelated to the fuel issue but has coincidentally failed.
* Immobilizer Problems (less likely): Some vehicles have an immobilizer system that prevents starting unless the correct key is used. This is less likely the cause, but worth considering if everything else checks out.
Here's what to do:
1. Add Fuel: The most obvious step! Add at least 5 gallons of gas.
2. Wait: Give the fuel pump time to prime itself. Try starting the vehicle after waiting 10-15 minutes. If it doesn't start, wait longer (up to an hour).
3. Check the Fuel Pump Relay (if you are mechanically inclined): Locate the fuel pump relay (usually in the underhood fuse box; consult your owner's manual) and try swapping it with another relay of the same amperage (if possible). This checks if the relay is faulty.
4. Listen for the Fuel Pump: When you turn the key to the "on" position (but don't crank the engine), you should hear a brief humming sound from the fuel pump (located in the fuel tank). If you don't hear it, the pump may be faulty. This is often difficult to hear in a Suburban.
5. Check the Fuel Filter: If you're comfortable working under the vehicle, locate the fuel filter and check for clogs.
6. Have it Towed: If the Suburban still doesn't start after trying the above steps, it's best to have it towed to a mechanic. They can diagnose the problem properly and avoid further damage.
In short: Don't just assume it's a simple lack of gas. Running completely dry can cause significant issues. The fuel pump is the most likely culprit, followed by air in the lines. A professional mechanic is the best solution if you're not comfortable troubleshooting car systems.
