2005 GMC Yukon 5.7 check engine light frustration
#1
2005 GMC Yukon 5.7 check engine light frustration
I have a 2005 Yukon and have been fighting a Check Engine light for a while. I don't have to codes available at this time but I will post them if need be. The codes show as O2 sensors "Bank 1" and another for the MAS. I've replaced both pre and post CAT drivers side O2 sensors and cleaned the gunky throttle body. I cleaned the throttle body first and the codes went away for about 100 miles. I then replaced the O2 sensors, the codes went away for about 15 miles. Any insight?
#3
Yes that was my bad. Typo. It is the 5.3 I'll post the codes tomorrow.
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