Skip the auto shop - Our mechanics make house calls

Q: My car will not always start - 2003 GMC Sierra 1500

asked by on

sometimes when I turn the key, I get nothing no sound or anything Thought it was battery got a new battery about a month ago Still does not always start when I turn key Lights and horn and radio still work I'm thinking its the starter
My car has an automatic transmission.

A: This may potentially be related to a faulty...

This may potentially be related to a faulty starter relay. This is a unit that directs power from the battery to the starter solenoid which then engages the starter when you turn the key. When this is not working properly, you may notice intermittent starting problems as you describe.

Generally, when this does fail, it does so very randomly and usually without warning other than intermittent starting. The power from the battery will still power other accessories such as radio, horn, etc. I would recommend having an expert from YourMechanic come to your location to determine why the car will not start and repair your starter relay if needed.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: I have no power to the fuel pump or the fuel cut off switch. All fuses are good, what could it be?

Hi there - now that you have checked the fuses (Good job!) check the MFI relay on the under-the-hood fuse & relay box. It controls power to the fuel pump and the engine control unit (ECU). If it is working,...

Q: Is this a transmission problem and if so does this mean the entire transmission needs to be replaced?

You should certainly let the insurance company know that your car has not been returned to its condition from before the accident. As for why your car is bucking on acceleration, I can make a few guesses, but the...

Q: Blower motor isn't working

Hi there. The fact that no air blows at idle but once the car moves you get flow makes it sound like the blower motor isn't really turning at at all, but rather you have the door set to outside...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...