Code readings

Asked by Jun 04, 2019 at 06:38 PM about the 2004 GMC Sierra 1500

Question type: Maintenance & Repair

I have an 04 gmc pick up. The code readings are as follows:
P.O. 300 multiple misfire
PO 171 and 174 system too lean bank 1 and 2
PO 1133 oxygen sensor bank 1 and 2

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