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03-10-2013, 03:34 PM
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Registered User
Join Date: Oct 2011
Location: Hebron, IN
Posts: 194
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2002 gmc yukon codes: P0171 P0174
2002 gmc yukon with 5.3 threw these two codes the other day. About 110,000mi, new maf last year, serp belt last year, and a water pump at least 6 years ago.
Had a buddy read it, and popped codes P0171 and P0174. Lean on bank 1 and 2. He cleared the codes, going to drive it and see if they come back. Has anybody dealt with these? and what fixed it? Any ways to test it, before throwing money and parts at it? Thanks David
__________________
Mom, I think I may have broke something. My tires keep spinning and leaving black marks every where 
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