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GMT 800 & Older GM General Discussion 2006 & Older Trucks | General Discussion

First tank of E 85 Fuel

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Old 08-09-2006, 08:34 AM
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Originally Posted by kerryt1
Your VIN will tell you. There's a letter for each engine...I think "T" is the regular 5.3 and "Z" is flex fuel. I'm about 75% sure on that, just do a quick double check if you want.
Correct, Z is flex fuel.
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