How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask AZTechBrian Your Own Question
AZTechBrian
AZTechBrian, ASE Certified Technician
Category: Chevy
Satisfied Customers: 706
Experience:  Owner
77606712
Type Your Chevy Question Here...
AZTechBrian is online now
A new question is answered every 9 seconds

My 2008 Suburban decided not to start 2 times today. No

Customer Question

My 2008 Suburban decided not to start 2 times today. No gauge lights, no head lights, didn't crank, 4 way flashers didn't work. First time it happened I turned the key off and back on and it started right up. All lights worked. Second time I was at my tire shop. Seemed like a dead system. Shop put booster on battery. Nothing. No lights, no dash, no crank. Got a mechanic in 5 minutes. Came back. Started right up like nothing was wrong. Has started 4 more times without problems. Any thoughts?
Submitted: 1 year ago.
Category: Chevy
Customer: replied 1 year ago.
245000 miles
Customer: replied 1 year ago.
Battery seems fine - it's about 1 year old. Cranks fast when it works.
Customer: replied 1 year ago.
Heard faint clicking sound for a few seconds when the system seemed dead the second time.
Customer: replied 1 year ago.
Tried the normal stuff...turn the steering wheel, tilt the steering wheel, wiggle key, press brakes.
Customer: replied 1 year ago.
Tried to move the shift lever, etc. Forgot to swear at it or pray for it.
Expert:  AZTechBrian replied 1 year ago.

When this happened, there was absolutely no power anywhere?

Customer: replied 1 year ago.
Correct. No dash. 4 way flashers didn't turn on. Headlights wouldn't turn on. These normally work with the key out I think.
Expert:  AZTechBrian replied 1 year ago.

Ok. If there was no power anywhere in the truck, then it's most likely a loose cable connection. Have all the connections been thoroughly checked?

Customer: replied 1 year ago.
When the tire shop put their booster on it, it bypassed the connections at the battery since it had good clip on connections.
Expert:  AZTechBrian replied 1 year ago.

or even just a bad connection. I have seen very tight connections that have been intact for years suddenly stop conducting power and needed to be removed and cleaned.

Expert:  AZTechBrian replied 1 year ago.

Usually the problem is the ground at the vehicle

Customer: replied 1 year ago.
Just a reminder. It has started normally several times after this.
Customer: replied 1 year ago.
I will have to check the ground wire connection away from the battery. Any other thoughts?
Expert:  AZTechBrian replied 1 year ago.

I would first remove the ground, clean it up with a wire brush and re install it.

I have kept that in mind, but a bad connection can cause an intermittent problem. If you have no power anywhere in the truck when this happens, then it's almost definitely a bad connection. If it were a bad ignition switch, or harness damage, etc. then there would be power somewhere.

Expert:  AZTechBrian replied 1 year ago.

The ground cable at the vehicle is where I would start.

Customer: replied 1 year ago.
I agree. Do you have any experience with the "brain" module going bad? Would that affect all power? Such as the 4 way flashers?
Customer: replied 1 year ago.
I'll wire brush the connection and check the battery connections.
Expert:  AZTechBrian replied 1 year ago.

The ground cable at the vehicle is where I would start. it's free, easy and a common issue. We do see it often.

There are no modules, including the PCM that could fail resulting in a loss of power to the entire truck

Customer: replied 1 year ago.
Okay. I'll check the wires in the morning.
Expert:  AZTechBrian replied 1 year ago.

Do you live in an area that has shown the truck 245k of salty roads and snow by chance?

Customer: replied 1 year ago.
Customer: replied 1 year ago.
The frame looks more rusty than my previous Suburban. I think the owner lived on a gravel road also. The body seems in good shape. Very minor rust.
Expert:  AZTechBrian replied 1 year ago.

Ok. Clean the ground cable real good, and the surface of the vehicle to make sure we are getting a very good ground. I honestly am very suspicious of that. I spent almost my entire career in the midwest, and saw this often.

Customer: replied 1 year ago.
Will do.
Expert:  AZTechBrian replied 1 year ago.

Great! Please let me know what you come up with. I usually respond pretty quickly as it goes to my phone

Customer: replied 1 year ago.
ok. how do I contact you tomorrow? From an email I think I will get?
Expert:  AZTechBrian replied 1 year ago.

You can message me right from here. I think in your email there is a link to get back to it if you can't log in. Not positive

Customer: replied 1 year ago.
OK. I'm headed to bed now.
Expert:  AZTechBrian replied 11 months ago.

Hi Jim. What did you find out?

Customer: replied 11 months ago.
It seems to have been the big fuse box under the hood. I replaced it and haven't had that problem since.
Expert:  AZTechBrian replied 11 months ago.

Wow, i'm surprised a blown fuse would cause an intermittent loss of power. It must have been a bad connection in the fuse box that was corrected by pulling and installing the fuse. At any rate, I'm glad it's figured out. Thanks for responding!

Customer: replied 11 months ago.
It wasn't a fuse, it was the fuse box's connections to the wires below. Corrosion at the main B+ power supply point.
Expert:  AZTechBrian replied 11 months ago.

OH, I misread. Figured it had to be a bad connection due to corrosion. Such symptoms usually are. Glad it's fixed.

Expert:  AZTechBrian replied 11 months ago.

Thanks for the reply and merry christmas!