Skip the auto shop - Our mechanics make house calls

Q: Why do my interior lights dim when stopping and car intermittently shuts off at stop light. 2006 Chevrolet Trailblazer

asked by on

First heat wouldn't blow. Replaced blower and pigtail. Then interior lights would dim when stopping checked battery and replaced alternator. Lights still dim and now car shuts off intermittently when stopping. Replaced ignition switch and got a code for gas cap. So that was replaced. Car continues to do the same thing any suggestions would be greatly appreciated

My car has 130000 miles.
My car has an automatic transmission.

Hello. This can be caused by a number of things. Most of the time if this only occurs when coming to a stop it is because the computer is not maintaining a high enough idle. This can occur because of a failing throttle body, or a problem within the engine or an intake manifold leak. This engine does have a common issue with valve seats failing causing an idling issue. I would usually start by cleaning out the throttle body to see if that corrects it. If it does not then the throttle body may need to be replaced. If the idle speed is fine then you may have a bad connection. I have seen a lot of grounding issues. Most of the time it is because of a bad ground on the engine or a bad connection at the battery ground cable. All of these need to be cleaned and tightened. If you need some assistance with this, consider YourMechanic, as a certified mechanic can come to you to [diagnose why the electrical system is acting like this] https://www.yourmechanic.com/services/electric-problems-inspection

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  • Home
  • Questions
  • Why do my interior lights dim when stopping and car intermittently shuts off at stop light. 2006 Chevrolet Trailblazer

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: Where is a yaw rate sensor located in a caprice 2008

The yaw rate sensor/lateral accelerometer on your vehicle is mounted beneath the center console and is held in place by two mounting nuts. To access the sensor, you have to follow the Factory Service Manual Procedure for removing the center console....

Q: I need to know what I need for my car to get a tune up.

The basic tune up will include replacing spark plugs, fuel filter and pcv valve. Then checking the air filter and replace if needed. You may want to also check coolant for need of replacement. The spark plug wires should be...

Q: I have a 1998 lexus gs4oo. I was driving it, and all of a sudden it started to die on me, it didn't die all of a sudden ,it kinda

There are a couple of sensors in your car that regulate the flow of fuel and air into the car's engine. One is called a mass air flow sensor. This regulates the air flow into the car's engine to make...

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...
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.