My truck won’t start


My truck won’t start Mechanic's Assistant: Have you checked the battery, particularly the terminal connections? Are they corroded? Anti theft lock is on Mechanic's Assistant: What is the make/model/year of your ca...

My truck won’t start Mechanic's Assistant: Have you checked the battery, particularly the terminal connections? Are they corroded? Anti theft lock is on Mechanic's Assistant: What is the make/model/year of your car? 2009 GMC SIERRA Mechanic's Assistant: Are you fixing your vehicle yourself? What have you tried so far? Ive tried disconnecting the battery leaving the key in the ignition for 10 minutes while it’s on the light won’t shut pff

Automotive Expert
Hello there, I am Cam. I am licensed automotive technician with more than 18 years experience. As an expert on the site, I only have access to your question. Any billing questions or concerns would require a customer service specialist. A couple things before we get going; - I am around most days but not every minute of every day. If you reply while I am offline, I will respond when I am next online. -I am a Firefighter/Paramedic which might require me to drop and run at any time without warning. If this happens, I will reply as soon as I am able to. -The website will automatically offer a phone call. Some times they are beneficial, sometimes not. I am sorry to hear you are having troubles with your vehicle. While I am looking at your question, can you tell me who I have the pleasure of assisting today? what [engine](/topics-engine-chevy/) is in your truck?

The engine lockout light is on and don’t know how to have it turned off
Automotive Expert
Did you happen to try the second key? Try a reset? Take the battery cables off the battery, hold the ends together for 10 seconds then attach them to the battery. This will reset the whole vehicle much like completely turning off a phone or computer and unplugging/removing the battery. If you have 2 batteries, then remove both and touch only one set.

Still not sure what you need?

Have a certified mobile mechanic diagnose what's wrong with your car, at your home or office.

What others are asking

Noisy steering, very new car, what’s causing it?
The whining noise you hear is coming from the power steering module, which is an electric motor that provides the assist, rather than a pump and a bunch of hoses. While this system has many advantages, noise seems to be...
How do you attach a child seat tether to the upper anchor?
If you’re using a child seat that features a tether, it should be secured to the anchor point above the rear seat in the car. Here’s how to attach it: Pull the tether out and up to the top of...
What is the key number tag?
Your vehicle comes with a key number tag, which is unique to your car. If you ever need to purchase a replacement key, you will need your key number tag. Tip Keep the key number tag in a safe location...
IDL - RPM is higher then normal
You should first check to make sure you do not have any vacuum leaks. Scan the computer and diagnose any service codes. If you do not have any codes, then you may just have to relearn the idle of the...
gas mileage difference 383 stroker motor 400 hp or ls3 computeried 400 hp same car
The gas mileage attained in either of these applications will depend heavily on your driving habits as you may already know. Either of these will also depend heavily on the type of intake system you are using to arrive at...
Car alarm is going off after putting in a fuse.
Hello and thank you for contacting YourMechanic. There could be an issue with the wiring. Look for a wire that says alarm on it. If there is no alarm wire, then look at where the alarm blinker is located and...
Battery + Oil Light on - engine won't start 2006 Kia Rio
Hi there - I would check for problem codes, whether the Check Engine light is illuminated or not. It would seem that something else is not quite right with your engine (https://www.yourmechanic.com/question/my-car-is-not-starting-what-might-be-the-problem-by-aditya-d). If your engine is cranking (i.e. actually spinning...
Rough idling
Hi there. It's possible that your throttle position sensor is the cause of your idle issues. If you cleaned the throttle body and that helped, it's also possible cleaning the fuel injectors and ERG valve would also improve this situation....
Battery light stays on and overnight battery drain. 2006 Land Rover LR3
Hello - this problem can be diagnosed by connecting an ammeter to the positive (red) battery cable, observe the current drain (likely less than 1 amp), then, one at a time, remove each fuse, check to see if the current...