The General Motors 8.1L engine line groups 3 variant designations. Parts and fitment are pooled here so a cross-reference found on one variant surfaces for the whole family.
| Part # | Description | Category |
|---|---|---|
| 0D5420 | AIR FILTER (NOT SHOWN) | Air filter |
| 85400737 | OUTER AIR FILTER | Air filter |
| 85400786 | INNER AIR FILTER | Air filter |
| 85403921 | AIR FILTER HEAVY DUTY | Air filter |
| 0A1232 | D.C. ALTERNATOR ASSY | Alternator |
| 85402451 | VOLTAGE REGULATOR | Avr |
| 0A4278C | BELT, SERPENTINE | Belt |
| 0A4278D | BELT, SERPENTINE 75.0" LG (G/B TURBO) | Belt |
| 374176 | Drive Belt | Belt |
| 85425460 | BELT | Belt |
| NGE012014 | Charge Air Cooler Bolts | Bolt |
| 375105 | Clutch Pilot Bearing Removal (C/K/C3500HD) | Clutch pilot bearing removal |
| 470627 | Clutch Pilot Bearing Removal (Medium Duty) | Clutch pilot bearing removal |
| 373133 | Clutch Pilot Bearing Removal Tools Required | Clutch pilot bearing removal tools required |
| 640014 | Crankshaft Balancer Removal Steps | Crankshaft balancer removal steps |
| 640013 | Crankshaft Balancer Removal Tools Required | Crankshaft balancer removal tools required |
| 638596 | Cylinder Head and Components | Cylinder head and components |
| 638608 | Engine Crankshaft and Components | Engine crankshaft and components |
| 470599 | Engine Flywheel Housing Removal (Medium Duty with AT) | Engine flywheel housing removal |
| 470572 | Engine Flywheel Removal (C/K/C3500HD with AT MT1) | Engine flywheel removal |
| 470576 | Engine Flywheel Removal (Medium Duty with MT) | Engine flywheel removal |
| 677814 | Engine Flywheel Removal (C3500HD with AT M74) | Engine flywheel removal |
| 679414 | Engine Flywheel Removal (C/K with MT) | Engine flywheel removal |
| 677764 | Engine Identification Number | Engine identification number |
| 1052367 | Engine Oil Supplement Lubricant | Fluid |
| 85403756 | BATTERY ELECTROLYTE | Fluid |
| 9985770 | MAP Sensor Seal Lubricant | Fluid |
| GM16430 | Sealer, oil pan / Sealant, Loctite | Fluid |
| GM18888 | Sealer, crankshaft rear main bearing | Fluid |
| GM18933 | Sealer, camshaft bearing hole plug | Fluid |
| GM18934 | Grease, heavy duty multipurpose | Fluid |
| 638592 | Flywheel Housing Adapter, Medium Duty with Manual Transmission | Flywheel housing adapter |
| 85400976 | FUEL FILTER | Fuel filter |
| 85403525 | FUEL FILTER SEPARATOR | Fuel filter |
| 85431120 | FUEL FILTER | Fuel filter |
| 055466 | GASKET-EXH MANIFOLD | Gasket |
| 0C6960 | GASKET, THERM 3LHA | Gasket |
| 0C81660121 | GASKET, WATER PUMP | Gasket |
| 0C81660124 | GASKET, ENG FRT COVER | Gasket |
| 0C81660142 | GASKET, OIL PAN | Gasket |
| 0C81660168 | GASKET, ENG COOL C/OVR PIPE | Gasket |
| 0C81660200 | GASKET VLV RKR ARM CVR | Gasket |
| 0C81660203 | GASKET, VLV RKR ARM CVR | Gasket |
| 0C81660226 | GASKET, CYL HEAD LH | Gasket |
| 0C81660227 | GASKET, CYL HEAD RH | Gasket |
| 0C81660253 | GASKET, EGR VLV PIPE | Gasket |
| 0C81660263 | GASKET KIT, INT MANIF (NOT SHOWN) | Gasket |
| 0C9786 | GASKET-MANIFOLD INTAKE | Gasket |
| 85401131 | ROCKER COVER GASKET | Gasket |
| GM18951 | Gasket, engine front cover, also part of 76 | Gasket |
| GM18963 | Gasket, water pump | Gasket |
| GM18964 | Gasket, engine coolant crossover | Gasket |
| GM19009 | Gasket, oil pan | Gasket |
| 047290 | HOSE 3/8 ID SINGLE BRAID (16” LG) | Hose |
| 083982 | HOSE 3/8 ID 100R6 OIL LINE | Hose |
| 0C81660159 | HOSE, THERM BYPASS (INCL CLAMPS) | Hose |
| 0C81660262 | HOSE, FUEL PRESS REG VAC | Hose |
| 0E5353 | HOSE,90DEG PREFORMED 3/8" I.D. | Hose |
| 0E5362 | HOSE,90DEG PREFORMED 3/4" I.D. | Hose |
| 85401289 | RADIATOR TOP HOSE | Hose |
| 85426005 | RADIATOR BOTTOM HOSE | Hose |
| GM18967 | Hose, therm bypass includes hose clamps | Hose |
| S105 | Ignition Coil (cylinders #8) | Ignition coil |
| S107 | Ignition Coil (cylinders #1, #3 & #5) | Ignition coil |
| 85400893 | INJECTOR | Injector |
| 638602 | Intake Manifold and Components | Intake manifold and components |
| 638616 | Lower Engine Block and Components | Lower engine block and components |
| 0C81660135 | OIL FILTER | Oil filter |
| 36881696 | ELEMENT, ENGINE OIL FILTER | Oil filter |
| GM16703 | Filter, oil | Oil filter |
| 470639 | Oil Level Indicator and Tube Removal (C/K/C3500HD) | Oil level indicator and tube removal |
| 470666 | Oil Level Indicator and Tube Removal (G) | Oil level indicator and tube removal |
| 022676 | FUSE AGC-15A. | Service part / kit |
| 0333-0588-03 | Coolant heater, 1500W, 120V | Service part / kit |
| 0C81660100 | RING KIT, PISTON, STD | Service part / kit |
| 0C81660101 | RING KIT, PISTON, O.S. 0.030" | Service part / kit |
| 0C81660107 | BEARING KIT, CONN ROD | Service part / kit |
| 0C81660126 | BEARING KIT, CR/SHF | Service part / kit |
| 0C81660127 | BEARING KIT, CR/SHF THRUST | Service part / kit |
| 0C81660180 | PIN, 1/4 X 5/8 | Service part / kit |
| 0C81660215 | VALVE, INT (STD) | Service part / kit |
| 0C81660219 | VALVE, EXH (STD) | Service part / kit |
| 0C81660223 | LIFTER, VALVE | Service part / kit |
| 0C81660245 | COIL, IGNITION | Service part / kit |
| 0D2031 | TENSIONER PULLEY | Service part / kit |
| 0E4149 | IGN CON (MEFI-4) 8.1GM D/D PGM | Service part / kit |
| 0E5355 | ASSY, AIR/OIL SEPERATOR | Service part / kit |
| 1051396 | Engine Oil Supplement Lubricant | Service part / kit |
| 1052942 | Crankshaft Rear Bearing Cap Sealant | Service part / kit |
| 12377901 | Camshaft Rear Bearing Hole Plug Sealant | Service part / kit |
| 22307 | Test Light Amperage Draw Test | Service part / kit |
| 24-XD | Battery, Crown 24-XD | Service part / kit |
| 39200 | DVOM J 39200 | Service part / kit |
| 85401081 | COOLANT HEATER RESISTANCE 1000W 240V | Service part / kit |
| 85403616 | ELECTRONIC ACTUATOR | Service part / kit |
| 85403731 | STARTING BATTERY 12V 100Ah 450A | Service part / kit |
| 85404267 | AIR HEATER RESISTANCE 1200W 12V | Service part / kit |
| 85409530 | 3 WAY FUEL VALVE | Service part / kit |
| 85410249 | AIR SHUT OFF VALVE D51 | Service part / kit |
| 85425585 | SURGE SUPPRESSOR | Service part / kit |
| 85425593 | DIODE BRIDGE | Service part / kit |
| 85425908 | BEARING | Service part / kit |
| 85425932 | DRIVE DISC | Service part / kit |
| 85426260 | ELECTRONIC GOVERNOR 12VCC | Service part / kit |
| 85500635 | WATER RADIATOR | Service part / kit |
| C109 | Ignition Control Ground | Service part / kit |
| C110 | Ignition Control Ground | Service part / kit |
| GM23005-5 | Coolant heater, Hotstart, 1500W, 120V | Service part / kit |
| GM28341 | Battery charger, 120V, 1.6A | Service part / kit |
| LG199 | Home Maintenance Kit | Service part / kit |
| 0C81660122 | PUMP KIT, WATER (INCL ITEMS 31,82,83,85,105) | Pump |
| 0C81660138 | PUMP, OIL (W/SCRN) | Pump |
| 85401313 | WATER PUMP | Pump |
| 85403434 | MANUAL PUMP | Pump |
| GM18990 | Pump, oil with screen | Pump |
| GM19027 | Pump kit, water (incl. 31, 82, 83, 85, 105) | Pump |
| 470515 | Repair Instructions - Draining Fluids and Oil Filter Removal | Repair instructions |
| 0A37970217 | SEAL, OIL PAN DRN PLUG | Seal |
| 0C81660128 | SEAL, CR/SHF RR OIL | Seal |
| 0C81660148 | SEAL, CR/SHF FRT OIL | Seal |
| 0C81660162 | SEAL, ENG COOL THERM (O-RING) | Seal |
| 0C81660237 | SEAL, VALVE STEM OIL | Seal |
| 0C81660261 | SEAL, MAP SEN | Seal |
| 85401206 | THERMOSTAT SEAL | Seal |
| GM16576 | Seal, oil pan drain plug | Seal |
| GM18971 | Seal, crankshaft rear oil | Seal |
| GM18972 | Seal, crankshaft front oil | Seal |
| 035606 | SENSOR HI COOLANT SHUTDOWN | Sensor |
| 053666 | SENDER OIL PRESSURE | Sensor |
| 053667 | SENDER WATER TEMP | Sensor |
| 0A8584 | Switch | Sensor |
| 0C81660171 | SENSOR, CM/SHF POSN | Sensor |
| 0C81660172 | SENSOR, CR/SHF POSN | Sensor |
| 0C81660174 | SENSOR, KNOCK | Sensor |
| 0C81660260 | SENSOR, MAP | Sensor |
| 0D2244M | ASSY MAGPICKUP (3/8-24 MALE) | Sensor |
| 0E0561 | ASSY WATER LEVEL SENSOR C/E PL | Sensor |
| 0E7590 | MAP SENSOR 2 ATMOSPHERE (8.1L DIRECT DRIVE TURBO) | Sensor |
| 290090 | Switch, low water temperature | Sensor |
| 416E | Manifold Absolute Pressure (MAP) sensor circuit - CKT 416E | Sensor |
| 85401099 | PRESSURE SWITCH | Sensor |
| 85401164 | TEMPERATURE SWITCH | Sensor |
| 85403632 | MAGNETIC SPEED SENSOR L75 3/4UNF | Sensor |
| 85404572 | LEVEL SENSOR | Sensor |
| 85404598 | PRESSURE SWITCH 00/10 BAR | Sensor |
| 85404606 | TEMPERATURE SENSOR 40/120° | Sensor |
| 85410108 | AIR RESTRICTION INDICATOR | Sensor |
| GM18906 | Sensor, knock | Sensor |
| GM18952 | Sensor, crankshaft position (includes 123) | Sensor |
| GM19004 | Sensor, camshaft position (2001 GM engines / GM model year 2003 and older) | Sensor |
| GM24739 | Sensor, camshaft position (2002 and 2003 GM engines) | Sensor |
| GM51539 | Sensor, camshaft position (2004-- GM engines) | Sensor |
| GM75077 | Sensor, Cm/Shf Posn (GM model year 2004 and newer) | Sensor |
| MEFI4309 | Map Sensor 1 | Sensor |
| MEFI4310 | Knock Sensor (KS) 1 | Sensor |
| MEFI4313 | Heated Oxygen (HO2) Sensor 1 | Sensor |
| 0C81660212 | SPARK PLUG | Spark plug |
| 0E0307 | SPARK PLUG WIRE SET | Spark plug |
| TJ14R-P15 | Denso plug type | Spark plug |
| 059056A | STARTER | Starter |
| 0C81660163 | THERMOSTAT, ENG COOL | Thermostat |
| 85401180 | THERMOSTAT | Thermostat |
| GM42165 | Thermostat, block heater 49C--60C (120F--140F) | Thermostat |
| 0E4149B | IGN CON (MWFI-4) 8.1GM (D/D TURBO) | Turbocharger |
| 0E4149C | IGN CON (MEF1-4) 8.1GM (G/B TURBO) | Turbocharger |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.