GM Service Manual Online
For 1990-2009 cars only

RPO

VIN

Displacement

Camshaft Position (CMP) Actuator Control System

Active Fuel Management Control System

E85 Capable

Block Material

LY2

C

4.8L

No

No

No

Iron

LC9

3

5.3L

No

Yes

Yes

Aluminum

LY5

J

5.3L

No

Yes

No

Iron

LMG

0

5.3L

No

Yes

Yes

Iron

LY6

K

6.0L

Yes

No

No

Iron

L76

Y

6.0L

Yes

Yes

No

Aluminum

L92

8

6.2L

Yes

Yes

No

Aluminum

    • First design L92 engines contain active fuel management hardware to include: valve lifters, lifter guides, camshaft, and valve lifter oil manifold. The system is inactive for the 2007 model year.
    • Second design L92 engines DO NOT contain active fuel management hardware and contain: non-active fuel management valve lifters, lifter guides, camshaft, and a valley cover to replace the valve lifter oil manifold.