Q: 08 chevy colorado 3.7 5 cyl should i be concerned that my alternator {2 months old} doesnt put out power for 2 min when cold start

asked by on

last thursday when i left work my battery light came on and dash showed charging system, it went away after 2 miles and the voltage increased from 10.8volts to 14.5 volts. I've noticed from cold starts this happens ranging from 1 to 3 min before the alternator seems to kick on. the battery is at 12.3 before I start, had the alternator and battery tested today at advance auto and they both passed (replaced them 2 months ago) as I drive i also notice the system voltage (according to the obd2 reader) hits 15.2volts as i am driving around. do you think it is possible for an intermittent issue with the alternator/voltage regulator on a new alternator? should i be concerned with the 15.2 volts being put out of the alternator as i drive?

My car has 264000 miles.
My car has an automatic transmission.

Hi there. At first glance, I would not assume that the voltage issues you are experiencing is related to a faulty alternator itself. It’s more likely that you have a faulty electrical connection or harness that is causing the inconsistent voltage problems. I would first check all electrical connections within the charging system on your Chevrolet Colorado first, to ensure they are all tight fitting and no frayed wires exist. If they all check out, then it’s possible that an internal fault exists within the alternator; but that is extremely rare. You might want to have a professional mechanic complete an electrical problems inspection at your location to help you diagnose this problem if you can’t resolve with the above recommendations.

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. 08 chevy colorado 3.7 5 cyl should i be concerned that my alternator {2 months old} doesnt put out power for 2 min when cold start

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 car does not start, it had overheating issues in the past

Sometimes when a heater hose has a leak, coolant will find a way to seep into electrical sensors or ignition components that will impact the vehicle's ability to start. However, if the overheating issue was bad enough, it may have...

Q: Camshaft sensor leaks oil 2008 Chevrolet Colorado

Hi there - not entirely sure what your question is. The cam position sensor, while getting oil splashed on the sensor tip, has an o-ring on it to seal against oil leaks. It doesn't not normally leak oil if the...

Q: I need a thermostat replaced do I need to replace the water pump as well

Typically, the scenario is the reverse: that is the water pump fails and the question is should the thermostat be replaced at the same time that the water pump is replaced. The answer is absolutely because the thermostat itself can...

Related articles

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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.