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  1. Home
  2. GMC Trucks
  3. 2003
  4. Sierra 2500 4WD (New Style)
  5. Engine V8

2003 GMC Trucks Sierra 2500 4WD (New Style) engine v8 parts catalog

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Seal, engine assembly v8 front cover and cooling (lr4/4.8v, lm7/5.3t, lq4/6.0u)

  • OEM part number: 12551905
  • Quantity in car: 1
  • Water pump cover (O-ring) (water pump backplate)
  • Usage: CK1, 2 (LM7), CK1, 2, 3 (LQ4), C1, 2 (LM7), CK2, 3 (LQ4), CK1, 2 (LM7)

$1.71—1.88

Available in 38 shops

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Pump kit, engine assembly v8 front cover and cooling (lr4/4.8v, lm7/5.3t, lq4/6.0u)

  • OEM part number: 19256261
  • Quantity in car: 1
  • Water (must order 12600172 inlet & 11516480 bolt when replace 89018166)
  • Usage: CK1, 2, 3 (LQ4), CK1, 2, 3 (LM7), CK2, 3 (LQ4)

$146.33—152.87

Available in 2 shops

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Pump kit, engine assembly v8 front cover and cooling (lr4/4.8v, lm7/5.3t, lq4/6.0u)

  • OEM part number: 19256261
  • Quantity in car: 1
  • Usage: CK1, 2 (LM7)

$146.33—152.87

Available in 2 shops

Add to cart

Seal, engine assembly v8 front cover and cooling (lr4/4.8v, lm7/5.3t, lq4/6.0u)

  • OEM part number: 12561155
  • Quantity in car: 1
  • Water pump (engine coolant thermostat hsng-between inlet)
  • Usage: CK1, 2 (LM7), CK1, 2, 3 (LQ4), CK1, 2 (LM7)

$7.24—14.42

Available in 38 shops

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Inlet, engine assembly v8 front cover and cooling (lr4/4.8v, lm7/5.3t, lq4/6.0u)

  • OEM part number: 12571261
  • Quantity in car: 1
  • Water pump (used on pumps with casting number 12562459) (if water pump has been replaced by 2004 or newer pump, must also use -2004 or newer inlet.)
  • Usage: C1, 2 (LM7), CK1, 2, 3 (LQ4), CK1, 2 (LM7), CK2, 3 (LQ4)

$33.26—36.33

Available in 2 shops

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Inlet, engine assembly v8 front cover and cooling (lr4/4.8v, lm7/5.3t, lq4/6.0u)

  • OEM part number: 12571261
  • Quantity in car: 1
  • Water pump (used on pumps with casting number 12562459, includes inlet, seal, thermostat, valve, retainer) (if water pump has been replaced by 2004 or newer pump, must also use -2004 or
  • Usage: CK1, 2 (LM7)

$33.26—36.33

Available in 2 shops

Add to cart

Inlet, engine assembly v8 front cover and cooling (lr4/4.8v, lm7/5.3t, lq4/6.0u)

  • OEM part number: 12600172
  • Quantity in car: 1
  • Usage: CK1, 2, 3 (LM7), CK1, 2, 3 (LQ4), CK1, 2, 3 (LQ4), CK1, 2, 3 (LM7)

$33.77—36.89

Available in 2 shops

Add to cart

Bolt, engine assembly v8 front cover and cooling (lr4/4.8v, lm7/5.3t, lq4/6.0u)

  • OEM part number: 11516480
  • Quantity in car: 1
  • Usage: CK1, 2 (LM7)

$3.23—4.17

Available in 38 shops

Add to cart

Bolt, engine assembly v8 front cover and cooling (lr4/4.8v, lm7/5.3t, lq4/6.0u)

  • OEM part number: 11516480
  • Quantity in car: 2
  • Usage: CK1, 2, 3 (LQ4)

$3.23—4.17

Available in 38 shops

Add to cart

Bolt, engine assembly v8 front cover and cooling (lr4/4.8v, lm7/5.3t, lq4/6.0u)

  • OEM part number: 12551926
  • Quantity in car: 6
  • Water pump (m8x1.25x83)
  • Usage: CK1, 2 (LM7), CK1, 2, 3 (LQ4), CK1, 2 (LM7), CK2, 3 (LQ4)

$2.89—8.75

Available in 38 shops

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Sensor, engine assembly v8 front cover and cooling (lr4/4.8v, lm7/5.3t, lq4/6.0u)

  • OEM part number: 12608814
  • Quantity in car: 1
  • Engine coolant temp (2-way male)
  • Usage: CK1, 2, 3 (LM7, LQ4, LQ9, LR4, L59), CK1, 2, 3 (LM7, LQ4, LQ9, LR4, L59), CK1, 2, 3 (LR4, LM7, LQ4), CK1, 2, 3 (LR4, LM7, LQ4)

$17.89—19.26

Available in 2 shops

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Tube, engine assembly v8 cylinder head and related parts (lr4/4.8v, lm7/5.3t, lq4/6.0u)

  • OEM part number: 12574660
  • Quantity in car: 1
  • Usage: CK1, 2, 3 (LQ4), CK1, 2 (LM7, LR4), CK2, 3 (LQ4), CK1, 2 (LM7)

$10.98—13.72

Available in 38 shops

Add to cart

Stud, engine assembly v8 cylinder head and related parts (lr4/4.8v, lm7/5.3t, lq4/6.0u)

  • OEM part number: 12554211
  • Quantity in car: 10
  • Ignition coil bracket (hexagon flanged head, m6x1x18) (m6x1x18.5x14)
  • Usage: CK2, 3 (LQ4), CK1, 2 (LM7), C1, 2 (LM7), CK1, 2, 3 (LQ4), CK1, 2 (LM7)

$4.71—5.30

Available in 38 shops

Add to cart

Bolt, engine assembly v8 cylinder head and related parts (lr4/4.8v, lm7/5.3t, lq4/6.0u)

  • OEM part number: 12577215
  • Quantity in car: 8
  • Usage: CK1, 2 (LM7), CK1, 2, 3 (LQ4), C1, 2 (LM7), CK2, 3 (LQ4), CK1, 2 (LM7)

$2.89—6.02

Available in 38 shops

Add to cart

Grommet, engine assembly v8 cylinder head and related parts (lr4/4.8v, lm7/5.3t, lq4/6.0u)

  • OEM part number: 10198949
  • Quantity in car: 1
  • Usage: CK1, 2 (LM7), CK2, 3 (LQ4), C1, 2 (LM7), CK1, 2, 3 (LQ4), CK1, 2 (LM7)

$5.16—9.96

Available in 38 shops

Add to cart

Bolt, engine assembly v8 cylinder head and related parts (lr4/4.8v, lm7/5.3t, lq4/6.0u)

  • OEM part number: 12560961
  • Quantity in car: 16
  • Valve rocker armature pivot support (m8x1.25x52.5)
  • Usage: CK1, 2 (LM7), CK1, 2, 3 (LQ4), C1, 2 (LM7), CK2, 3 (LQ4), CK1, 2 (LM7)

$3.45—4.70

Available in 38 shops

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Armature, engine assembly v8 cylinder head and related parts (lr4/4.8v, lm7/5.3t, lq4/6.0u)

  • OEM part number: 10214664
  • Quantity in car: 16
  • Valve rocker
  • Usage: CK1, 2 (LM7), C1, 2 (LM7), CK1, 2 (LM7)

$9.27—10.39

Available in 2 shops

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Armature, engine assembly v8 cylinder head and related parts (lr4/4.8v, lm7/5.3t, lq4/6.0u)

  • OEM part number: 10214664
  • Quantity in car: 16
  • Valve rocker
  • Usage: CK1, 2, 3 (LQ4), CK2, 3 (LQ4)
  • A Service Bulletin Applies To This Part Number. Per Gm Service Policies And Procedures, Failure To Follow Bulletin Information May Result In The Rejection Of A Warranty Claim.

$9.27—10.39

Available in 2 shops

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Support, engine assembly v8 cylinder head and related parts (lr4/4.8v, lm7/5.3t, lq4/6.0u)

  • OEM part number: 12552203
  • Quantity in car: 2
  • Valve rocker armature pivot
  • Usage: CK1, 2 (LM7), CK1, 2, 3 (LQ4), CK1, 2 (LM7), CK2, 3 (LQ4)

$3.76—5.15

Available in 38 shops

Add to cart

Cover LH, engine assembly v8 cylinder head and related parts (lr4/4.8v, lm7/5.3t, lq4/6.0u)

  • OEM part number: 12570427
  • Quantity in car: 1
  • Usage: CK1, 2, 3 (LQ4), CK1, 2 (LM7), C1, 2 (LM7), CK1, 2 (LM7), CK2, 3 (LQ4)

$92.39—109.41

Available in 38 shops

Add to cart

Gasket, engine assembly v8 cylinder head and related parts (lr4/4.8v, lm7/5.3t, lq4/6.0u)

  • OEM part number: 12612045
  • Quantity in car: 2
  • Usage: CK1, 2, 3 (LQ4), CK1, 2 (LM7), C1, 2 (LM7), CK1, 2 (LM7), CK2, 3 (LQ4)

$3.19

Available in 1 shop

Add to cart

Bolt, engine assembly v8 cylinder head and related parts (lr4/4.8v, lm7/5.3t, lq4/6.0u)

  • OEM part number: 11588291
  • Quantity in car: 16
  • Cylinder head (hex flanged head, m11x2.0x155, 50 thread with adhesive patch)
  • Usage: CK1, 2 (LM7), C1, 2 (LM7), CK1, 2 (LM7), CK2, 3 (LQ4), CK1, 2, 3 (LQ4)

$5.41—9.59

Available in 38 shops

Add to cart

Bolt, engine assembly v8 cylinder head and related parts (lr4/4.8v, lm7/5.3t, lq4/6.0u)

  • OEM part number: 12560745
  • Quantity in car: 4
  • Cylinder head (short) (m11x2.0x100.0-6g thread) (with adhesive patch)
  • Usage: CK1, 2, 3 (LQ4), CK1, 2 (LM7)

$1.38—2.82

Available in 38 shops

Add to cart

Bolt, engine assembly v8 cylinder head and related parts (lr4/4.8v, lm7/5.3t, lq4/6.0u)

  • OEM part number: 12560745
  • Quantity in car: 4
  • Cylinder head (m11x2.0x100.0-6g thread) (with adhesive patch)
  • Usage: CK1, 2 (LM7), C1, 2 (LM7), CK2, 3 (LQ4)

$1.38—2.82

Available in 38 shops

Add to cart

Bolt, engine assembly v8 cylinder head and related parts (lr4/4.8v, lm7/5.3t, lq4/6.0u)

  • OEM part number: 12558840
  • Quantity in car: 10
  • Cylinder head (short) (m8x1.25x45)
  • Usage: CK1, 2, 3 (LQ4), CK1, 2 (LM7), C1, 2 (LM7), CK1, 2 (LM7), CK2, 3 (LQ4)

$1.33—2.80

Available in 38 shops

Add to cart

Head, engine assembly v8 cylinder head and related parts (lr4/4.8v, lm7/5.3t, lq4/6.0u)

  • OEM part number: 12564335
  • Quantity in car: 2
  • Usage: CK1, 2, 3 (LQ4, MT1, KL5), CK2, 3 (LQ4, KL5)

$378.84—426.30

Available in 2 shops

Add to cart

Head, engine assembly v8 cylinder head and related parts (lr4/4.8v, lm7/5.3t, lq4/6.0u)

  • OEM part number: 12562319
  • Quantity in car: 2
  • Usage: CK1, 2, 3 (LQ4) (EXC KL5), CK2, 3 (LQ4) (EXC KL5)

$360.15—498.10

Available in 38 shops

Add to cart

Head, engine assembly v8 cylinder head and related parts (lr4/4.8v, lm7/5.3t, lq4/6.0u)

  • OEM part number: 12578925
  • Quantity in car: 2
  • Usage: CK1, 2 (LM7), CK1, 2 (LM7)

$325.48—424.35

Available in 38 shops

Add to cart

Head, engine assembly v8 cylinder head and related parts (lr4/4.8v, lm7/5.3t, lq4/6.0u)

  • OEM part number: 12578925
  • Quantity in car: 2
  • Usage: C1, 2 (LM7)
  • A Service Bulletin Applies To This Part Number. Per Gm Service Policies And Procedures, Failure To Follow Bulletin Information May Result In The Rejection Of A Warranty Claim.

$325.48—424.35

Available in 38 shops

Add to cart

Key, engine assembly v8 cylinder head and related parts (lr4/4.8v, lm7/5.3t, lq4/6.0u)

  • OEM part number: 10166345
  • Quantity in car: 32
  • Valve stem
  • Usage: CK1, 2 (LM7), CK1, 2, 3 (LQ4), C1, 2 (LM7), CK2, 3 (LQ4)

$1.67—2.26

Available in 38 shops

Add to cart

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