Q: GM 5.3L No Spark No Start scanner dont read any error code, MIL on continuos.

Sometimes you don’t want the heat or the air on in the car. The ventilation system is designed to circulate fresh air from outside the car into the cabin. To use this system, follow these steps: Turn the temperature control...

This is true, but there are countless other reasons for an illuminated Check Engine Light (https://www.yourmechanic.com/article/what-does-the-check-engine-warning-light-mean) as well. A loose gas cap will typically set an evaporative emissions (EVAP) system code, such as P0440 (https://www.yourmechanic.com/article/p0440-obd-ii-trouble-code-evaporative-emission-control-system-malfunction-by-jay-safford_2) or P0455 (https://www.yourmechanic.com/article/p0455-obd-ii-trouble-code-system-gross-leak-evaporative-emission-by-john-nelson). The EVAP...

From what you've described you may just have a bad battery connection. You should first have the vehicle jump started to see if it stays running and look for any lights that may have been left on. Once the jumper...

Hi - regarding the crankshaft sensor - if the new one (cheap or otherwise) is not causing any misfire, it is just fine for now anyway. What code is "still coming up"? That is fairly important in the diagnostic process....

If you smell gas, there can be a leak in a number of places. All the fuel lines should be carefully inspected to make sure they are secure and undamaged, all the way up to the fuel injectors themselves. Even...

Hello - to resolve your "no heat" issue (https://www.yourmechanic.com/question/heater-not-working-reliably-is-it-caused-by-a-bad-thermostat-by-thomas-c), first check that the engine is running at design temperature (center of the gauge), or 190-205 degrees Farenheit. If engine is up to temp, grab the heater hoses (carefully) inside the...

Shaking or vibration (https://www.yourmechanic.com/services/engine-is-shaking-pulsating-or-vibrating-inspection) may be caused by many different things such as faulty spark plugs, poor fuel pressure or misfires. Other things such as a faulty idle air control valve (https://www.yourmechanic.com/services/idle-control-valve-replacement) may cause the engine idle to drop below...

It is certainly possible that something could have gone wrong during the repair. The best thing to do in this situation is to return to the mechanic who did the repairs and ask them to give your vehicle as second...

Hi Chantel: A big uncertainty in trying to answer your question is I do not know if the present codes, that have caused the check engine light to illuminate, are the "same" as the original codes from January and thus,...