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My 2002 Sonoma crew cab 4.3 4x4 started to run rough and the…

Customer Question
My 2002 Sonoma crew...

My 2002 Sonoma crew cab 4.3 4x4 started to run rough and the "check engine light" came on. The mechanic changed (2) O2 sensors, the catalytic converter and the fuel pump. The truck again did the same thing when it came under load on a hill, on the way home from the garage.

Mechanic's Assistant: Does the light stay on, or does it blink?

It blinks at first, then stays on.

Mechanic's Assistant: Are you fixing your Sonoma yourself? What have you tried so far?

I had it to the garage and the mechanic changed the oxygen sensors and the catalytic converter. He said that the computer reading indicated that they were faulty. After test driving it, the light came back on and he told me the fuel pressure was to low and that it needed a new fuel pump. I changed that my self. I am a retired truck mechanic but am not good with computers and do not have one that can read codes on cars.

Submitted: 6 months ago.Category: GMC
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Answered in 2 minutes by:
8/3/2017
GMC Mechanic: KALAMYKID, Shop owner, tech replied 6 months ago
KALAMYKID
KALAMYKID, Shop owner, tech
Category: GMC
Satisfied Customers: 4,918
Experience: HAVE OWNED MY OWN SHOP FOR OVER THREE YEARS. I HAVE THE TOOLS AND SOFTWARE TO ANSWERE ALMOST ANY QUESTION CORECTLY.
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What auto parts stores do you have near you? Many can read the codes for you for free. If you can have one read the codes for you , we can fix what is really wrong with your truck.

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Customer reply replied 6 months ago
I have several parts stores nearby. I will have them read the code tomorrow.
GMC Mechanic: KALAMYKID, Shop owner, tech replied 6 months ago

That would be great. If they will read the codes, wright them down and post them to this chat screen and I will go over what needs to be check and or tested to fix this problem.

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Customer reply replied 6 months ago
thank you
GMC Mechanic: KALAMYKID, Shop owner, tech replied 6 months ago

Chat with you tomorrow.

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Gm Tech (Cam)
Gm Tech (Cam)
Gm Tech (Cam), GMC Mechanic
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