Engine Assembly-Cylinder Head & Related Parts fit your 2003 Chevrolet Trailblazer EXT 4WD

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2003 Chevrolet Trailblazer EXT 4WD

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Vehicle Options

4-Speed Automatic Transmission, 4L60-E, Electronic; Trailblazer 4 Door EXT

Vehicle Options

4-Speed Automatic Transmission, 4L60-E, Electronic; Trailblazer 4 Door EXT

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Front Axle, Front Suspension, Steering

Front End Sheet Metal, Heater

Fuel System, Exhaust, Emission System

Maintenance Parts, Fluids, Capacities, Electrical Connectors

Rear Body Structure, Moldings & Trim, Cargo Stowage

Starter, Generator, Ignition, Electrical, Lamps

Transfer Case

Transmission - Automatic

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Recommended

Part No. & Part Description

Price & Qty.

Part No. &
Part Description

12585673
SEAL, Engine Front Cover & Crankshaft Seal, SEAL,CRANKSHAFT FRONT OIL(PART OF 238)
$45.94 $23.15
1
Add To Cart

SPARK PLUG, Spark Ignition
19299585
SPARK PLUG, GASOLINE ENGINE IGNITION(PLATINUM PLUG)
Fitting Vehicle Options: ST1(LM4)
Require Quantity: 08
Package Quantity: 1
$13.20 $7.36
1
Add To Cart
12681663
SPARK PLUG, GASOLINE ENGINE IGNITION(SPARK PLUG IS PRE-GAPPED,DO NOT CHANGE)(IRIDIUM)
- Fitting Vehicle Options: ST1(LL8)
- Require Quantity: 06
- Package Quantity: 1
$15.80 $8.81
1
Add To Cart
19354418
SPARK PLUG, GASOLINE ENGINE IGNITION
- Fitting Vehicle Options: ST155,158(06)(LM4,ACD)
- Require Quantity: 08
- Package Quantity: 1
$4.18 $2.33
1
Add To Cart

12637683
GASKET, Engine Camshaft & Valve Rocker Cover, GASKET,VALVE ROCKER ARM COVER(PART OF 204,242)(*KIT1)
- Require Quantity: 02
- Package Quantity: 1
$34.05 $21.63
1
Add To Cart

BOLT, Engine Cylinder Head
12558840
BOLT, CYL HEAD(M8X1.25X45)
Fitting Vehicle Options: ST1(LM4)
Require Quantity: 10
Package Quantity: 1
$5.95 $3.73
1
Add To Cart
11588291
BOLT, CYL HEAD(M11X2.0X155)
- Fitting Vehicle Options: ST1(LM4)
- Require Quantity: 16
- Package Quantity: 1
$10.53 $6.68
1
Add To Cart
12560745
BOLT, CYL HEAD(M11X2.0X100.0-6G THREAD)(W/ADHESIVE PATCH)
- Fitting Vehicle Options: ST1(LM4)
- Require Quantity: 04
- Package Quantity: 5
$6.28 $3.78
5
Add To Cart
11609709
BOLT, CYL HEAD(M11X2X145, 34 THREAD,25 OUTSIDE DIAMETER, 10.9,)
- Fitting Vehicle Options: ST1(LL8)
- Require Quantity: 14
- Package Quantity: 10
$7.44 $4.73
10
Add To Cart
11519038
BOLT, CYL HEAD(BOLT-HEX FLANGED HEAD,M6X1X30,24 THREAD,13.2 OUTSIDE DIAMETER,10.9,GMW3359)(M6X1X30)(W/ADHESIVE ON THREADS)(8.900)
- Fitting Vehicle Options: ST1(LL8)
- Require Quantity: 02
- Package Quantity: 1
$0.58 $0.37
1
Add To Cart
11519306
BOLT, CYL HEAD(BOLT-HEX FLANGED HEAD,M6X1X88.3,17 THREAD,14.2 OUTSIDE DIAMETER,10.9,4435M,MACHINE,6194M,HEADER POINT)
- Fitting Vehicle Options: ST1(LL8)
$12.37 $7.86
1
Add To Cart

12633904
GASKET, Engine Front Cover, GASKET,ENGINE FRONT COVER(PART OF 238)
$47.74 $30.36
1
Add To Cart

SEAL KIT, Engine Valve

12482063
SEAL KIT, INTAKE VALVE STEM OIL(SEPARATE SEAL AND(RUBBER COATED) SPRING SHIM)(14.4MM)(CONTAINS 8 SEALS)
$60.23 $36.39
1
Add To Cart
12482062
SEAL KIT, EXHAUST VALVE STEM OIL(22.8MM)(CONTAINS 8 SEALS)
$66.04 $41.42
1
Add To Cart

ARM, Engine Valve Rocker
24100294
ARM, VALVE ROCKER
Fitting Vehicle Options: ST1(LL8)
Require Quantity: 24
Package Quantity: 1
$8.02 $4.84
1
Add To Cart
12681275
ARM, VALVE ROCKER
- Fitting Vehicle Options: ST1(LM4)
- Require Quantity: 16
- Package Quantity: 1
$22.71 $13.72
1
Add To Cart

12595365
GUIDE, Engine Valve Push Rod Cover, GUIDE,VALVE LIFTER(ACCOMMODATES 4 VALVE LFTRS EACH,WITH SIDE GROOVES)
$17.43 $11.08
1
Add To Cart

CAP, Engine Oil Filler
12573337
CAP, OIL FILLER(SAE 5W30, NON-VENTED, SEAL)(INCLUDES 900)
Fitting Vehicle Options: ST1(LL8)
$21.00 $11.71
1
Add To Cart
12573337
CAP, OIL FILLER(SAE 5W30, NON-VENTED, SEAL)(INCLUDES 245)
- Fitting Vehicle Options: ST1(LM4)
$21.00 $11.71
1
Add To Cart

12615873
VALVE, Engine Camshaft, VALVE,CAMSHAFT POSITION ACTUATOR SOLENOID(MATING CONNECT W/LEADS USE 13580114)
$88.28 $59.18
1
Add To Cart

COVER, Engine Valve Rocker & Camshaft
12570427
COVER, VALVE ROCKER ARM(INCLUDES 202,205)(INCLUDES:COVER,GASKET,BOLT,DEFLECTOR,FITTING)(REMOVE PCV VALVE AND CONNECT HOSE TO VALVE COVER PORTION WHEN USING TO REPLACE PART NUMBER-12561820)
Location: Driver Side
Fitting Vehicle Options: ST158(06)(LM4)
$202.36 $128.03
1
Add To Cart
12582224
COVER, VALVE ROCKER ARM(INCLUDES 202,205)(INCLUDES:COVER,GASKET,BOLT,CONNECTOR,FITTING,BAFFLE,CAP)(WHEN REPLACING COVER, TRIM EXISTING PCV HOSE TO FIT OR USE PCV HOSE 12582227)(IF REPLACING 2-PORTION VALVE COVER, PLUG LOOSE PCV HOSE.)
- Location: Passenger Side
- Fitting Vehicle Options: ST1(LM4)
$160.89 $102.23
1
Add To Cart
12591994
COVER, CAMSHAFT(INCLUDES 519,520,905,907)(HAS CRANKCASE VENTILATION SYSTEM/NO PCV VALVE)
- Fitting Vehicle Options: ST1(LL8)

12577215
BOLT, Engine Camshaft & Valve Rocker Cover, BOLT,VALVE ROCKER ARM COVER(M6.0X1.0)(W/GROMMET,SLEEVE)
- Require Quantity: 04
- Package Quantity: 1
$7.48 $4.75
1
Add To Cart

10238852
ROD, Engine Valve Push Rod, ROD,VALVE PUSH
- Require Quantity: 16
- Package Quantity: 1
$30.29 $18.31
1
Add To Cart

12574660
TUBE, Engine Crankcase Ventilation, TUBE,PCV(INCLUDE VALVE)
$64.90 $34.40
1
Add To Cart

12552203
SUPPORT, Engine Valve Adjusting, SUPPORT,VALVE ROCKER ARM PIVOT
- Require Quantity: 02
- Package Quantity: 1
$80.61 $51.23
1
Add To Cart

12584079
SENSOR, Distributor (also Knock Sensor), SENSOR,CAMSHAFT POSITION(W/ANGLE CONNECTOR)(INCLUDES 909)
$132.06 $72.23
1
Add To Cart

12574386
TUBE, Engine Crankcase, TUBE,OIL FILLER
$85.44 $49.10
1
Add To Cart

PLUG, Engine Cylinder Head
1647544
PLUG, CYL HEAD ACCESS HOLE(M24X1.5X12)(ROUND HEAD,INTAKE HEXAGON,W/SEAL,NYLON)(0.034)
Fitting Vehicle Options: ST1(LL8)
Require Quantity: 02
Package Quantity: 1
$14.42 $10.25
1
Add To Cart
11610259
PLUG, CYL HEAD CORE HOLE(M12X1.5X21.2)(HEXAGON,SOCKET)
- Fitting Vehicle Options: ST1(LM4)
$11.14 $6.72
1
Add To Cart
11562126
PLUG, CYL HEAD CORE HOLE(CUP,32.03X7.88X1.27, S30400 STAINLESS STEEL PER SAE J405.)
- Fitting Vehicle Options: ST1(LM4)
- Require Quantity: 02
- Package Quantity: 10
$4.17 $2.65
10
Add To Cart
11562125
PLUG, CYL HEAD WATER JACKET HOLE(22.6 OUTSIDE DIAMETER)(3.675)
- Fitting Vehicle Options: ST1(LL8)
$5.86 $3.72

12554211
STUD, Ignition Coil Mounting, STUD,IGNITION COIL BRACKET(HEX FLANGED HEAD,M6X1X18)(M6X1X18.5X14)(3.330)
- Require Quantity: 10
- Package Quantity: 1
$14.14 $7.88
1
Add To Cart

10166345
KEY, Valve Stem, KEY,VALVE STEM
- Require Quantity: 16
- Package Quantity: 10
$5.17 $3.28
10
Add To Cart

SPRING, Engine Valve
12706568
SPRING, VALVE
Fitting Vehicle Options: ST1(LM4)
Require Quantity: 16
Package Quantity: 1
$7.39 $4.63
1
Add To Cart
12596078
SPRING, VALVE
- Fitting Vehicle Options: ST1(LL8)
- Require Quantity: 24
- Package Quantity: 1
$0.42 $0.27
1
Add To Cart

SEAL, Engine Oil Filler
24100002
SEAL, OIL FILLER CAP(O RING)(PART OF 521)(27.94MM INNER DIAMETER)(SIZE #320)(1.745)
Require Quantity: 02
Package Quantity: 5
$5.47 $2.72
5
Add To Cart
24100002
SEAL, OIL FILLER CAP(O RING)(PART OF 246)(27.94MM INNER DIAMETER)(SIZE #320)(1.745)
- Require Quantity: 02
- Package Quantity: 5
$5.47 $2.72
5
Add To Cart

24100002
SEAL, Engine Crankcase, SEAL,OIL FILLER TUBE(O RING)(27.94MM INNER DIAMETER)(SIZE #320)
- Require Quantity: 02
- Package Quantity: 5
$5.47 $2.72
5
Add To Cart

10198949
GROMMET, Engine Crankcase, GROMMET,PCV VALVE(PART OF 204,242)
$11.50 $7.30
1
Add To Cart

12551163
BOLT, Engine Valve Lifter, BOLT,VALVE LIFTER GUIDE(M6X1.0X19)
- Require Quantity: 04
- Package Quantity: 10
$6.82 $4.34
10
Add To Cart

12556932
HOSE, Engine Crankcase Ventilation, HOSE,PCV
$82.66 $34.72
1
Add To Cart

12560961
BOLT, Engine Valve Rocker Arm Shaft, BOLT,VALVE ROCKER ARM PIVOT SUPPORT(M8X1.25X52.5)
- Require Quantity: 16
- Package Quantity: 1
$9.27 $5.89
1
Add To Cart

VALVE, Intake
12564494
VALVE, INTAKE(STD)
Fitting Vehicle Options: ST1(LM4)
Require Quantity: 08
Package Quantity: 1
$34.46 $20.82
1
Add To Cart
12569014
VALVE, INTAKE(.075 OVERSIZE)
- Fitting Vehicle Options: ST1(LL8)
- Require Quantity: 12
- Package Quantity: 1
$125.96 $62.45
1
Add To Cart
24576974
VALVE, INTAKE(STD)
- Fitting Vehicle Options: ST1(LL8)
- Require Quantity: 12
- Package Quantity: 1
$21.19 $13.05
1
Add To Cart

12570326
PIN, Engine Cylinder Head, PIN,CYL HEAD LOCATING
- Require Quantity: 04
- Package Quantity: 1
$7.39 $4.69
1
Add To Cart

12575329
GASKET, Engine Cylinder Head, GASKET,CYL HEAD(*KIT1)
- Require Quantity: 02
- Package Quantity: 1
$69.23 $44.01
1
Add To Cart

12575742
COVER, Engine Fuel Intake Manifold, COVER,ENGINE BLOCK VALLEY
$515.95 $326.44

PLUG, Cylinder Head Valve Seat

24577307
PLUG, CYL HEAD OIL GALLERY(FRONT)
$12.47 $7.93
1
Add To Cart
11609916
PLUG, CYL HEAD OIL GALLERY(REAR)(M14X1.5X21.5)
- Require Quantity: 02
- Package Quantity: 1
$10.88 $6.91
1
Add To Cart

GASKET KIT, Engine Cylinder Head
89017252
GASKET KIT, CYL HEAD(EXCEPT:CYL HEAD BOLTS)(INCLUDES 205,230)(INCLUDES GASKET,CYL HEAD,INTAKE MANIFOLD,EXHAUST MANIFOLD,VALVE ROCKER COVER,SEAL)
Fitting Vehicle Options: ST1(LM4)
$317.38 $200.80
1
Add To Cart
19368586
GASKET KIT, CYL HEAD(INCLUDES 205,230)(INCLUDES GASKET,CYL HEAD,INTAKE MANIFOLD,EXHAUST MANIFOLD,VALVE ROCKER COVER,SEAL)
- Fitting Vehicle Options: ST1(LM4)
$453.23 $260.41
1
Add To Cart
12482715
GASKET KIT, CYL HEAD(INCLUDES 201,209,520,905)(HAS CRANKCASE VENTILATION SYSTEM/NO PCV VALVE)
- Fitting Vehicle Options: ST1(LL8)

12596994
SEAL, Engine Valve, SEAL,VALVE STEM OIL(*KIT2)
- Require Quantity: 24
- Package Quantity: 1
$14.54 $9.24
1
Add To Cart

19244715
SENSOR, Computer Control Sensors, SENSOR,ENGINE COOLANT TEMPERATURE(1.150)
$81.56 $39.28
1
Add To Cart

19244715
SENSOR, Coolant Temperature (Engine Unit), SENSOR,ENGINE COOLANT TEMPERATURE
$81.56 $39.28
1
Add To Cart

CAMSHAFT, Engine

19301652
CAMSHAFT, INTAKE(REMANUFACTURED-NOT FOR SALE WHERE IMPORTS ARE RESTRICTED)
$377.56 $278.31
1
Add To Cart
24577279
CAMSHAFT, EXHAUST(MACHINING)
$441.22 $279.17

HEAD, Engine Cylinder
12578925
HEAD, CYL(INCLUDES 218)(EXCEPT VALVES)
Fitting Vehicle Options: ST1(LM4,M30)
Require Quantity: 02
Package Quantity: 1
$854.96 $538.50
19207470
HEAD, CYL(MACHINING)(INCLUDES VALVES,VALVE SPRINGS, KEYS AND RETAINERS)(INCLUDES 224,225,901,902,904)(REMANUFACTURED-NOT FOR SALE WHERE IMPORTS ARE RESTRICTED)
- Fitting Vehicle Options: ST1(LL8)

10166344
CAP, Engine Valve Spring, CAP,VALVE SPRING
- Require Quantity: 16
- Package Quantity: 1
$5.70 $3.27
1
Add To Cart

VALVE, Exhaust
12569015
VALVE, EXHAUST(.075 OVERSIZE)
Fitting Vehicle Options: ST1(LL8)
Require Quantity: 12
Package Quantity: 1
$132.26 $64.10
1
Add To Cart
12694167
VALVE, EXHAUST
- Fitting Vehicle Options: ST1(LM4)
- Require Quantity: 08
- Package Quantity: 1
$37.36 $22.58
1
Add To Cart
24576975
VALVE, EXHAUST(STD)
- Fitting Vehicle Options: ST1(LL8)
- Require Quantity: 12
- Package Quantity: 1
$8.42 $6.75
1
Add To Cart
12562954
VALVE, EXHAUST(0.015" OVERSIZE)
- Fitting Vehicle Options: ST1(LM4)
- Require Quantity: 08
- Package Quantity: 1

12569484
PLUG, Emission System, PLUG,SECONDARY AIR INJECTION PIPE HOLE(12.7MM)
$6.51 $4.14
1
Add To Cart

12570816
BOLT, Engine Camshaft & Balance Shaft Front, BOLT,CAMSHAFT BEARING CAP(PART OF 200)(M6X1.0X39.2)
- Require Quantity: 29
- Package Quantity: 1
$9.67 $6.14
1
Add To Cart

12615912
INSULATOR, Engine Camshaft & Valve Rocker Cover, INSULATOR,CAMSHAFT COVER BOLT(PART OF 518)(INCLUDES BOLT,GROMMET)
- Require Quantity: 21
- Package Quantity: 1
$21.92 $13.93
1
Add To Cart

12633906
COVER, Engine Front Cover, COVER,ENGINE FRONT(INCLUDES 236,237,239)
$175.87 $101.05
1
Add To Cart

12686787
ADJUSTER, Engine Valve Lifter, ADJUSTER,HYDRAULIC VALVE LASH
- Require Quantity: 24
- Package Quantity: 1
$23.17 $13.99
1
Add To Cart

12698945
LIFTER, Engine Valve Lifter, LIFTER,VALVE(LIFTERS ONLY)(NON-ACTIVE FUEL MANAGEMENT LIFTER)
- Require Quantity: 16
- Package Quantity: 1
$49.82 $30.10
1
Add To Cart

89017729
GASKET KIT, Engine Camshaft & Valve Rocker Cover, GASKET KIT,CAMSHAFT COVER(INCLUDES 520,905)
$39.64 $23.95
1
Add To Cart

89018055
WIRE, Spark Plug or Coil, WIRE,SPARK PLUG(INDIVIDUAL LEAD, BLACK CABLE. USED TO SERVICE BLUE PRODUCT WIRES)
- Require Quantity: 08
- Package Quantity: 1
$44.24 $23.45
1
Add To Cart

90354648
KEY, Engine Valve Spring Cap, KEY,VALVE STEM
- Require Quantity: 48
- Package Quantity: 1
$7.03 $4.46
1
Add To Cart

90537243
RETAINER, Engine Valve, RETAINER,VALVE SPRING
- Require Quantity: 24
- Package Quantity: 5
$8.60 $5.46
5
Add To Cart

12572633
BRACKET, Engine Lift, BRACKET,ENGINE LIFT FRONT

11515767
BOLT, HEX FLANGED HEAD,M10X1.5X35,32THD,22.3 O.D.,MACHINE,10.9,7114M(ENGINE LIFT BRACKET)(TOGETHER WITH 12345493)
- Require Quantity: 02
- Package Quantity: 10
$1.22 $0.79
10
Add To Cart

11515758
BOLT, HEX FLANGED HEAD,M8X1.25X30,28THD,18 O.D.,MACHINE POINT,10.9,7114M(PART OF 238)
- Require Quantity: 08
- Package Quantity: 10
$1.86 $1.18
10
Add To Cart

11562426
BOLT, HEX FLANGED HEAD,M6X1X25,18 THREAD,14.2 OUTSIDE DIAMETER, 10.9 STEEL GMW3359(CAMSHAFT POSITION SENSOR)
$10.85 $6.56
1
Add To Cart

11517518
BOLT, HEX FLANGED HEAD,M6X1X20,17.9 THREAD,14.2 O.D.,9.8,TIN ZINC(CAMSHAFT POSITION ACTUATOR)
$7.91 $4.55
1
Add To Cart

11504978
NUT, U-TYPE M6X1 PNLS 13.5 DEEP ZINC ORGANIC(PART OF 518)
- Require Quantity: 02
- Package Quantity: 1
$4.72 $3.00
1
Add To Cart

11562004
BOLT, HEXAGON W/FLAT WASHER,M10X1.5X30,19 THREAD,20 OUTSIDE DIAMETER,8.8,GMW3200,MACHINE,M-POINT(ENGINE LIFT FRONT BRACKET)
- Require Quantity: 03
- Package Quantity: 10
$5.83 $3.70

Genuine GM Parts, the Right Choice

GMPartsGiant.com offers the wholesale prices for genuine 2003 Chevrolet Trailblazer EXT 4WD parts. Parts like Engine Assembly-Cylinder Head & Related Parts are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 4.2L, 8 Cyl 5.3L. Model Code: 4 DOOR EXT.