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Replacement Bulbs
It is recommended that you use an AC
whenever you need to replace one.
Before you replace any bulbs, be sure that all lamps are
off and the engine isn't running.
Capacities and Specifications
Replacement part numbers listed in this section are
based on the latest information available at the time of
printing. They are subject to later change. If a part listed
here isn't the same as the part in your vehicle when it
was built, or if you have any questions, please contact
your GM Truck dealer.
Engine Identification and Data
Engine RPO
LG5
Engine Type
7.2L L6
Fuel System
HEUI
Firing Order
-
-
-
1
5
3
6
6-70
R
type bulb
LP4/L21
7.4L V8
SPFI
-
-
-
-
-
-
-
-
-
2
4 1
8
4
3
6
5
7
2
Wheel Nut Torque
Refer to "Tightening the Wheel Nuts" in this section for
wheel nut torque information.
Cooling System Capacity
Model
. . . . . . . . . . . . . . . . . . . . . . . .
7.2L
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
with automatic transmission
7.4L
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
with automatic transmission
Above capacities (volumes) are approximate.
Quarts (Liters)
32.0 (30.0)
. . . . . . . . . .
30.0 (28.4)
25.0 (23.7)
. . . . . . . . . .
23.0 (22.7)
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