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The following engines are listed on the E85fuel.com website as compatible with this part ethanol fuel. Does this mean us??

2003 - 2006

5.3L V-8 engine Chevy Silverado and GMC Sierra half-ton pickups 2WD & 4WD

5.3L Vortec-engine Suburban, Tahoe, Yukon and Yukon XLs
 

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There's a specifically modified 5.3 engine for the E85. It's got bigger injectors and different computer programming to handle the increased volume necessary for ethanol, and I'm guessing some different fuel system components that are more resistant to the corrosive nature of ethanol too.

It's option code L59 vs. LM7 for the conventional 5.3
 
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