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2005 GMC Yukon SLE 4dr 1500

2005 GMC Yukon
Trim Info:
Rear Wheel Drive, 4 Door
16 mpg city / 20 mpg hwy
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January 3, 2013, 12:49 pm

Eaton S

Question: engine running lean on both banks

Just had a tune up, all new spark plugs and wires, new air filter and new fuel filter. Oil change less than 200 miles ago. No detected vacuum leaks, tried cleaning the MAF, but it didn't make a difference. Trying to figure out what is causing it.It has the 5.3 liter engine.


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