First tank of E 85 Fuel
Aug 9, 2006 | 08:34 AM
#21
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.
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Fast86z
GM Engine & Exhaust Performance
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Aug 23, 2015 12:35 AM
