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2002 GMC 1500 DENALI CHECK ENGINE LIGHT ON LOST POWER RAN…

Customer Question
2002 GMC 1500 DENALI...

2002 GMC 1500 DENALI CHECK ENGINE LIGHT ON LOST POWER RAN ROUGH WILL START RUNS ROUGH RPMS DROP STALLS WILL NOT STAY RUNNING

Mechanic's Assistant: Is the power loss consistent, or does it fluctuate?

WILL START POWER GOES RIGHT DOWN

Mechanic's Assistant: Are you fixing your 2500 yourself? What have you tried so far?

YES CHECKED OIL LEVEL AND AIR CLEANER

Submitted: 2 months ago.Category: GMC
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Answered in 4 minutes by:
5/31/2018
GMC Mechanic: Amedee, GMC Technician replied 2 months ago
Amedee
Amedee, GMC Technician
Category: GMC
Satisfied Customers: 28,318
Experience: ASE Technician advanced level specialist
Verified

Hello and welcome!

Thank you for your question. My name isCustomerand I will be happy to assist you today. I am reviewing the details now.

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GMC Mechanic: Amedee, GMC Technician replied 2 months ago

Can I start by getting the VIN or engine size and all codes stored in the computer?

Thank you!

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Customer reply replied 2 months ago
Vin 2gtfk69u621389134. I don't know how to get the codes.
GMC Mechanic: Amedee, GMC Technician replied 2 months ago

Thank you for that information. Please allow some time while I gather and type up your information.

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GMC Mechanic: Amedee, GMC Technician replied 2 months ago

Ok sorry for the delay! Without knowing the codes in the computer it is hard to say exactly what is going on. However, based on the information above, it sounds like the engine is misfiring. This will cause the engine light to come on, engine to run rough and possibly even stall out depending on the situation.

The MOST COMMON cause of a misfire condition on this engine would be tune up components. You might just need a simple tune up. However, there are other things as well. For example, injectors, throttle body, air or vacuum leak, MAP or MAF sensor or even crankshaft position sensor.

Your first step is to get the codes pulled from the computer and go from there. Most auto parts stores will do this for free for you or you can borrow, rent or purchase a code reader to obtain the codes stored in the computer.

I am glad I can help! Keep in mind this is a "starting point". My goal is to give you the best experience possible! I hope I have earned a 5-star rating! Please remember to rate my service by selecting the 5 stars at the top of the screen before you leave today. If you need more assistance, please use the reply box and let me know.

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GMC Mechanic: Amedee, GMC Technician replied 2 months ago

Hello there!

I am just checking in to see how things are going and to see if you need any further assistance?

If so, please let me know as I will be happy to help.

Best Regards,

Customer/p>

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