How Do I Know If I Have A 5.3 Vortec?

How Do I Know If I Have A 5.3 Vortec? How do I know what 5.3 I have? The 4.8/5.3L motors are easy to identify by their large 4.8/5.3 casting mark on the front of the block, but there is no simple, external way to differentiate the 4.8 from the 5.3. The best way is … Continue reading How Do I Know If I Have A 5.3 Vortec?