Skip the auto shop - Our mechanics make house calls

Q: Car does not start sometimes, sometimes it does.

asked by on

Hey, i have a problem with my 2003 GMC sierra 1500 4.8L v8. When i try and start it sometimes it wont start. I put the key in accessory mode right before i crank the engine and all my gauges start moving like normal but when i try and turn the engine on they freeze and the whole truck loses power. Everything just dies and it feels like i have no battery, everything just turns off. I have to get out and disconnect the battery then reconnect it and it will start just fine. Any ideas?

My car has 160000 miles.
My car has an automatic transmission.

A: Try disconnecting the battery. Disconnect t...

Try disconnecting the battery. Disconnect the electrical connections to the body control and engine control modules. Apply dielectric lube to the pins and seals using small amounts only. Reconnect the modules and then reconnect the battery to see if this fixes the problem for you. If the problem persists, or if you want to have this checked, a certified technician from YourMechanic can come to your home or office to diagnose your starting issue.

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

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: Was going fast and all of a sudden the rpm's shot up and the gears didnt want to switch normally

Hello there. Based on what you have written here, there could be multiple issues going on with your Chevrolet Tahoe. In general, when you're under acceleration and the engine suddenly revs up and stops accelerating, this is caused by a...

Q: Brake system warning after jumpstarting girlfriends car

Hi there: In some instances, when you jump start a vehicle, an electrical surge will be sent through the vehicle being jumped. Generally, this will not impact sensors or trigger warning lights to illuminate; however, it is possible that is...

Q: Coolant leak around water pump

Hi. This is a sign that the seals in the water pump are beginning the fail. Behind the pulley, there should be a small hole for the coolant to leak out of. Without the hole, coolant could seep into the...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.