Engine upgrade to 5.3 liter

[mci007]

I have a 2004 Tahoe with 4.8 liter engine, 8th digit Vin V, what 5.3 motor do i look for, it seems when looking through ebay they have a compatible chart and i cant seem to find a suitible motor to upgrade to, they all ask what my 8 digit is and the chart keeps saying noting is compatible. what 8th digit vin will fit in my tahoe, it seems the only difference i can tell is my 4.8 does NOT have flex fuel rails and DOES have a 24 tooth reluctor wheel. As long as the reluctor wheel is the same i can use the motor, I plan to only use the long block and nothing else, meaning all my parts should just bolt on to the new long block.

Any help is appreciated.

 

[Sasquatch]

I can`t help with what engine is compatible but if you`re looking for a bigger engine i`d skip the 5.3 and go for a 6.0.

 

[bottomline2000]

Swap everything on your current motor to the new motor and it will not matter. You do want to stay with a crank with the same reluctant tooth count. Having had a 5.3 i'd go to a 6.0 if you're going to do a swap anyway. Same amount of work with more reward.

 

[SLCHOE]

Vin Z would be Flex
Vin T would be gas

 

[ccapehartusarmyINF.(ret)]

i just went from a 4.8 tahoe now i have a 5.3 suburban and i didnt notice much difference
other then my tahoe lagged off the line since it was a 3.42 rear instead of a 3.73 rear in my burban