2002 Yukon Denali check engine light flashing

Asked by Parrothead2 Nov 12, 2018 at 12:15 PM about the 2002 GMC Yukon XL Denali 4WD

Question type: Maintenance & Repair

2002 Yukon Denali check engine light started flashing 12
times then stays on then flashes again 12 times. Just had
the muffler replaced, and now it runs like crap.

1 Answer

262,345

Have the codes checked anyway. Sometimes when exhaust work is performed if there is any weakness in the O2 sensors they go away.

Your Answer:

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