Skip the auto shop - Our mechanics make house calls

Q: would not stay started

asked by on

I just bought a Sierra 1500 SLE 2wd. I purchased the demo from the dealer with about 4600 miles on it, and it now has 6500 miles on it. I got in the truck and it started just fine, but it wouldn't stay started. It would start up just fine but the speed would slowly become less and less. The truck would vibrate badly and the speed was bouncing around. Then it died in about 25 seconds. There were no warning lights of any kind. I could start the truck, but then the same process would repeat itself. I tried starting it 30 more times. Then I had it towed to GMC. When I went to pick up my truck it stayed started and was running. Do you know what could have caused this problem with my GMC?

Hello. Most of the time this is caused by a voltage issue. If the battery was low or if there was a bad connection at the battery then this can occur. More than likely they charged the battery and checked the connections and that took care of it. The dealer should have told you what it took to fix it. If you continue to have this problem, a certified mobile mechanic from YourMechanic can visit your home or office to inspect why your truck is shutting off.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Engine shuts off

This may be a sign of a faulty MAP sensor as the vehicle responds adversely to a load put on the motor (i.e. putting it in gear, making turns (which makes use of the power steering pressure switch) turning on...

Q: After new front bearings/hubs, Lexus still making noise and shaking

Hello, thank you for writing in. Feeling steering and suspension issues in the steering wheel is very common. While everything you have done is within reason, there are several components that need to be inspected or tested. You will want...

Q: Alternator bearing making noise

Hello, if you hear a bearing that is noisy in the alternator, the only repair is to replace the alternator. This is something that should be done sooner than later to avoid the bearing failing and locking up the alternator...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...