Q: 1999 chevy K150 suburban electrical problems

asked by on

My 1999 chevy k1500 suburban is acting up. Locks seem like they dont have enough power to lock or unlock. I hear the clicking under the dash from what I assume is the relay. The 2 12v power outlets are also acting weird. They have power but the power seems to be "pulsating". I put a usb charger in it, without anything charging, and the green power light on it goes bright/dim quickly and makes what I can describe as an electrical sound. The 4x4 button too. Only lights up half way, half the time. Always let's me switch wheel, just doesn't light up all the way. Same with ac/heat controls. The left side of the cluster is really dim, and matches the rear controls on the head liner in the front. What can I do to determine the problem?

My car has 181000 miles.
My car has an automatic transmission.

Hello, thank you for writing in. There are several components that will attribute to electrical issues like this. Generally speaking, when you have issues with several electrical systems at once, and not just one or the other, the charging system is to blame because it effects all systems. With that being said, start by testing the battery and the alternator. Both can be tested in car with a voltmeter, or at your local parts store if removed from the vehicle. You may also want to check into the battery cables, alternator connections, and wires feeding the fuse box. Make sure they are all clean, dry, and tight. For more help with diagnostics and repairs, contact our service department to schedule an appointment.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. 1999 chevy K150 suburban electrical problems

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: My 99gmc suburban backfires in the throttle body, won't start.

If you were getting a rattling noise in the lower front of the motor then you engine may have jumped timing. The timing chain may have been so worn that it jumped ignition timing between the crankshaft and camshaft. That...

Q: Alternator won't charge battery

As a colleague of mine used to say, "everything works, but the hands don't move," He used that expression when he had checked everything on a certain system and found it to be working correctly, but the system was still...

Q: Q: Need to start car after sitting for a few years

Hi there, the battery will be completely dead since the vehicle hasn't been driven for so long. You could try charging the battery overnight or try jumpstarting the car. With any luck the battery will still be able to hold...

Related articles

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...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.