How do I identify a Vortec Max engine?
How do I identify a Vortec Max engine? Because it was an add-on package, there isn't really any way to say “if you have this feature, then you have the MAX engine. Ultimately, the easiest way to tell if you have the MAX engine is to use a VIN decoder. Some of the MAX engines feature the words “MAX” in red text on the engine cover. Where are the serial numbers on a GMC? The GMC plants may be as follows: Position 12 – 17 is held by six numbers that represent the vehicle’s serial number. The sequence of numbers...