can anyone help me with the engine codes i have for a 2004 gmc yukon xl?

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  • can anyone help me with the engine codes i have for a 2004 gmc yukon xl?


Answer #1 | 20/12 2013 02:42
With that combination of codes, I would suggest you to check the intake gaskets for leak and replace it.. There is no need to explain. The definition of the codes you can find out at: rain_trouble_codes
Positive: 66 %
Answer #2 | 20/12 2013 04:39
A GMC or Chevrolet Dealer can read the fault codes on your on-board computer, separate them and find the real cause.
Positive: 60 %
Answer #3 | 20/12 2013 06:19
I actually have had 3 of those codes on my 99 S10 4.3. P0171, P0174 and P0300. P0171 System too lean (bank 1) P0174 System too lean (bank2) P0300 Multiple Random Cylinder Misfires Check Vacuum lines, plugs, wires, distributor, cap, spider, gaskets, and then move up to the big stuff (costly repairs) just check the small stuff first. My lean codes were a result of vacuum lines, but others have said the stuff i listed above. And if you really want, go pick up an OBD-II scanner at any local auto store. It reeally helps and dont have to worry about headaches!
Positive: 40 %

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