got this from car and driver. i believe all 5.3's put in 2007 tahoes are fex fuel as it says they are all E85 compatible
2007 Chevrolet Tahoe LS Utility Performance & Efficiency Standard Features
- 5,328 cc 5.3 liters V 8 front engine with 96 mm bore, 92 mm stroke, 9.9 compression ratio, overhead valve and two valves per cylinder LMG
- E85 fuel with additional unleaded 87
- Fuel economy EPA highway (mpg): 15 and EPA city (mpg): 11
- Multi-point injection fuel system
- 26 gallon main E85 fuel tank
- Power: 239 kW , 320 HP SAE @ 5,300 rpm; 340 ft lb , 461 Nm @ 4,200 rpm
- Secondary fuel economy: US std - highway - mpg 15 and US std - city - mpg 21 ; 17
its not an l92 intake. and im 99% sure that my 5.3 is a gen 3 motor
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