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 hauto Your Own Question
hauto, Chevy Technician
Category: Chevy
Satisfied Customers: 2728
Experience:  Work on all makes and modles, in my own shop 15 years hands on experince
Type Your Chevy Question Here...
hauto is online now
A new question is answered every 9 seconds

I have a 2002 chevy silverado 1500 and my service engine soon

Resolved Question:

I have a 2002 chevy silverado 1500 and my service engine soon light came on what could be the reason or reasons for that? It sounds normal and is not running rough. I do keep up on my routine maintance.
Submitted: 7 years ago.
Category: Chevy
Expert:  hauto replied 7 years ago.

Hello, the check engine light is triggered by the engine control module when it see a malfunction with the input or out put senors of the engine management system or emissions. depending on the fault the engine will probably run good, and the module has to be scan to pull the fault codes( Dtc's) to point the area of trouble and then diagnosed.


Customer: replied 7 years ago.
how serious is this should i take it in right away and do i have to go to the dealer
Expert:  hauto replied 7 years ago.

The dealer is an option but they will charge you lots for diagnostics. See if you can find a trusted repair shop close by. As far as serious if the engine is running ok now then it

can't be serious. But it should be diagnosed it may eventually effect the way the engine runs or fuel economy.

hauto and 6 other Chevy Specialists are ready to help you