GM Service Manual Online
For 1990-2009 cars only
Figure 1:

L18 and LF8/LMM without CTF


Object Number: 1909106  Size: FS
Master Electrical Component List
Power Take-Off (PTO) Description and Operation
Control Module References
LF8/LMM with CTF
ENG-2, and ENG-3 Fuses - LF8
ENG-1 and ENG-4 Fuses - L18/LMM
ENG-1 and ENG-4 Fuses - L18/LMM
DIC
G101 - 1 of 2
Figure 2:

LF8/LMM with CTF


Object Number: 2073669  Size: FS
Master Electrical Component List
Power Take-Off (PTO) Description and Operation
Control Module References
w/o LF6 2 of 2
w/o LF6 1 of 2
ENG-2, and ENG-3 Fuses - LF8
ENG-1 and ENG-4 Fuses - L18/LMM
ENG-1 and ENG-4 Fuses - L18/LMM
Figure 3:

X121 and X127 Upfitter PTO Connectors, without LF6


Object Number: 1909110  Size: FS
Master Electrical Component List
Power Take-Off (PTO) Description and Operation
Control Module References
LF8/LMM with CTF
Power Take Off (PTO) System References
Ground Distribution Schematics
LF8/LMM
Figure 4:

w/LF6


Object Number: 1909113  Size: FS
Master Electrical Component List
Power Take-Off (PTO) Description and Operation
Control Module References
w/o LF6 2 of 2
ENG-1 and ENG-4 Fuses - LF6/LF8
ENG-1 and ENG-4 Fuses - LF6/LF8
ENG-2, and ENG-3 Fuses - LF6/LMM
ENG-2, and ENG-3 Fuses - LF6/LMM
Engine Data Sensors - Low Reference 2 of 2
G100 - LF6