GMC 2003 C4C042 Owner's Manual page 345

Service Replacement Part and Filter Recommendations
Engine 7.2L
RPO LG5
Spark Plug
Gap
Torque
R
Oil Filter CAT 1R0739
Air Cleaner Donaldson P522606
Fuel Filter ACDelco
915 Primary**
8.1L
L18
R
ACDelco
0.060 inch (1.52 mm)
14.75 lb. ft. (20.0 Nm)
R
ACDelco
R
ACDelco
R R
ACDelco
7.8L
LG4
-
41 983
PF454 GM Part No. 94392475 ACDelco
A1518C C4/C5 Models:
GM Part No. 88937527
C6/C7/C8 Models:
GM Part
No. 88937548***
GF626* GM Part No. 94392474 GM Part No. 97256734
6.6L
LB7
R
PF1218
C4/C5 Models:
GM Part No. 88937527
C6/C7/C8 Models:
GM Part No. 88937548***
6-91