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SES Light...need help!

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Old May 5, 2003 | 04:00 PM
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Hit Man X's Avatar
Hit Man X
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Default SES Light...need help!
My truck has just over 41K on it, it is an '01 Silverado. I pulled my codes via AutoTap and I got the following listed:

P0171
P0174
H0171
H0174

Something about me running lean?

I also checked my LT fuel trims they were at 25% and the ST fuel trims were between 15-18% (they were constantly changing as the vehicle was on.

Any ideas on what the hell would cause this?

Thanks!
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