Air Compressor Filter

Haldex compressor (8.1L Engine Only)

88915425

A507CF

Engine Air Cleaner/Filter

• 6.6L; 8.1L (C4/C5 Models)

88937527

A2032C

• 7.2L; 7.8L (C6/C7/C8 Models) with Standard Air Cleaner

88937525

A2031C

• 7.2L; 7.8L (C6/C7/C8 Models) with Heavy Duty Air Cleaner

88937525¹

A2031C

• 8.1L (C6/C7/C8 Models) with Heavy Duty Air Cleaner

88937525

A2031C

• 8.1L (C6/C7/C8 Models) with Standard Air Cleaner

88937545

A2034C

Engine Oil Filter

• 6.6L

88917036

PF2232

• 7.2L

--

1R-1807††

• 7.8L

94037791

--

• 8.1L

25324052

PF454

Fuel Filter

• 6.6L

97385488

TP1298A

• 7.2L

--

1R-0751††

• 7.8L

94392474

--

• 8.1L (NG6/NK1)

21998364

--

• 8.1L (All others)

--

S3202†

Power Steering Fluid Filter

88892858

--

Secondary Fuel Filter

• 6.6L

--

--

• 7.2L

25014274

TP915D

• 7.2L (KUK)

88983117

TP1519

• 7.2L (NWB)

15618921

--

• 7.8L

25014274

TP915D

• 7.8L (KUK)

88983117

TP1519

• 8.1L (K28 and standard Uhaul)

25014476

TP1247

Spark Plugs

• 6.6L

--

--

• 7.2L

--

--

• 7.8L

--

--

• 8.1L

12578277

41-983

¹Optional air filter (GM Part No. 88937548 AC Delco No. A2035C) for C6/C7/C8 Models. Fits inside standard size filter (GM Part No. 88937525 AC Delco No. A2031C) listed previously.

†Racor part number.

††Caterpillar® part number.

See the Allison Transmission Operator's Manual in your vehicle for external filter part numbers and information.