Hello,
I'm am trying to identify what vehicle a 5.3L vortec came out of. I purchased this engine to rebuild. Here is what I know:
Numbers etched at back of block, drivers side behind head:
15701 158K
Numbers etched at back of drivers side head (alum):
2004503 (below valve cover at back)
5154kk 794776 ( on exhaust port surface at back of head)
Numbers etched at back of passenger head:
1604516
5154kk 789776 (on exhaust port surface at back of head)
Aluminum heads cast #12561706
Crank cast #12552216 (narrow flange)
Number on end of camshaft: 0967
coated pistons, rods with bushings,floating wrist pins, dished pistons
Head bolts all the same length (except the little ones by the intake manifold)
cam sensor at back of block (top), oil pan cast #12560392
Thank you in advance for the help!

 

Numbers etched at back of block, drivers side behind head:
15701 158K

The vehicle identification number (VIN) is located on the left side rear of the engine block  and is typically a 9 digit number stamped or laser-etched onto the engine at the vehicle assembly plant.

• The first digit identifies the division.

• The second digit identifies the model year.

• The third digit identifies the assembly plant.

• The fourth through ninth digits are the last 6 digits of the VIN.

USA
2005
Plant ?
Vin?

 

I finally found the etching for the information I need.
T51393299
Does anyone what this motor came out of originally?
Thanks for all the help.