GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2000 🢒 GMC C Pickup - 2WD 🢒 General Information 🢒 General Information 🢒 Engine ID and VIN Derivative Location

6.5L Diesel Engine
Object Number: 181919 Size: MF

The engine unit number or date code is either laser etched or stamped into the engine block.

All engines are stamped with an eight digit engine identification number.

5.0L and 5.7L Engines
Object Number: 181920 Size: SH

All engines are stamped with an eight digit engine identification number.

Figure 1:

7.4L Engine
Object Number: 181924 Size: SH
Figure 2:

Engine ID
Object Number: 174106 Size: SH
(1)Source Code
(2)Month of Build
(3)Date of Build
(4)Broadcast Code