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2003 GMC Sierra 3500
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OEM (Genuine) 2003 GMC Sierra 3500 Engine Exhaust Manifold
PartNumber: 12616285
Product Specifications- Notes: 6.0 Liter Gas; All Models; 6.0l; Left; All
- Location: Driver Side
- Other Names: Exhaust Manifold, Manifold
- Item Dimensions: 10.1 x 8.1 x 25.4 inches
- Item Weight: 10.10 Pounds
- Fitment Type: Direct Replacement
- Replaces: 12564155, 12602037, 12571678, 12562235
- Part Description: 2003 GMC Sierra 3500 Engine Exhaust Manifold
Vehicle Fitment- 2003 GMC Sierra 3500 | Base, SL, SLE, SLT, WT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS
$126.98 MSRP:$162.96You Save: $35.98 (23%)
Dorman® Cast Iron Natural Exhaust Manifold for 2003 GMC Sierra 3500
PartNumber: 674-736Product Specifications- Finish: Natural
- Flange Bolt Hole Quantity: 0
- Flange Stud Hole Quantity: 3
- Gasket or Seal Included: Yes
- Header Material: Cast Iron
- Heat Shield Included: Yes
- Inlet Port Shape: Square
- Installation Hardware Included: Yes
- Item Grade: Regular
- Manifold Bolt Hole Quantity: 8
- OE Part Number: 12624683, 97224586
- Package Quantity: 1
- Position: Passenger Side
- UPC: 019495212911
- Part Description: 2003 GMC Sierra 3500 Cast Iron Natural Exhaust Manifold
Vehicle Fitment- 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.6L
$185.78
OEM (Genuine) 2003 GMC Sierra 3500 Exhaust Manifold
PartNumber: 12624683
Product Specifications- Notes: All Models; 6.6l; Right; 6.6 Liter Turbo Diesel, 1st Design
- Location: Passenger Side
- Other Names: Exhaust Manifold
- Item Dimensions: 22.8 x 5.8 x 5.9 inches
- Item Weight: 9.00 Pounds
- Fitment Type: Direct Replacement
- Replaces: 97224586
- Part Description: 2003 GMC Sierra 3500 Exhaust Manifold
Vehicle Fitment- 2003 GMC Sierra 3500 | Base, SL, SLE, SLT, WT | 8 Cyl 6.6 L DIESEL
$300.14 MSRP:$447.77You Save: $147.63 (33%)
Dorman® Cast Iron Natural Exhaust Manifold for 2003 GMC Sierra 3500
PartNumber: 674-732Product Specifications- Finish: Natural
- Flange Bolt Hole Quantity: 0
- Flange Stud Hole Quantity: 3
- Gasket or Seal Included: Yes
- Header Material: Cast Iron
- Heat Shield Included: Yes
- Inlet Port Shape: Round
- Installation Hardware Included: Yes
- Item Grade: Regular
- Manifold Bolt Hole Quantity: 6
- OE Part Number: 12569416, 12569530, 12578341, 12602038, 12616286, 12648339, 12677665
- Package Quantity: 1
- Position: Passenger Side
- UPC: 019495212904
- Part Description: 2003 GMC Sierra 3500 Cast Iron Natural Exhaust Manifold
Vehicle Fitment- 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.0L
$137.52
Dorman® Cast Iron Natural Exhaust Manifold for 2003 GMC Sierra 3500
PartNumber: 674-522Product Specifications- Finish: Natural
- Flange Bolt Hole Quantity: 0
- Flange Stud Hole Quantity: 3
- Gasket or Seal Included: Yes
- Header Material: Cast Iron
- Heat Shield Included: Yes
- Inlet Port Shape: Round
- Installation Hardware Included: Yes
- Item Grade: Regular
- Manifold Bolt Hole Quantity: 6
- OE Part Number: 12556078, 12562235, 12562330, 12564155, 12571678, 12602037, 12616285
- Package Quantity: 1
- Position: Driver Side
- UPC: 019495064978
- Part Description: 2003 GMC Sierra 3500 Cast Iron Natural Exhaust Manifold
Vehicle Fitment- 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.0L
$95.43
Dorman® Cast Iron Natural Exhaust Manifold for 2003 GMC Sierra 3500
PartNumber: 674-731Product Specifications- Finish: Natural
- Flange Bolt Hole Quantity: 0
- Flange Stud Hole Quantity: 3
- Gasket or Seal Included: Yes
- Header Material: Cast Iron
- Heat Shield Included: No
- Inlet Port Shape: Square
- Installation Hardware Included: Yes
- Item Grade: Regular
- Manifold Bolt Hole Quantity: 8
- OE Part Number: 12624684, 12637647, 97224587
- Package Quantity: 1
- Position: Driver Side
- UPC: 019495212935
- Part Description: 2003 GMC Sierra 3500 Cast Iron Natural Exhaust Manifold
Vehicle Fitment- 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.6L
$71.95
OEM (Genuine) 2003 GMC Sierra 3500 Manifold
PartNumber: 12605246
Product Specifications- Notes: 6.0 Liter Gas; All Models; 6.0l; Right; All
- Location: Passenger Side
- Other Names: Exhaust Manifold, Manifold
- Item Dimensions: 9.7 x 8.1 x 25.7 inches
- Item Weight: 14.30 Pounds
- Fitment Type: Direct Replacement
- Replaces: 12564157, 12562236
- Part Description: 2003 GMC Sierra 3500 Manifold
Vehicle Fitment- 2003 GMC Sierra 3500 | Base, SL, SLE, SLT | 8 Cyl 6.0 L GAS
OEM (Genuine) 2003 GMC Sierra 3500 Engine Exhaust Manifold (Machining)
PartNumber: 12557286
Product Specifications- Notes: All Models; 8.1l; Right; 8.1 Liter Gas
- Location: Passenger Side
- Other Names: Exhaust Manifold, Manifold
- Item Dimensions: 22.5 x 11.4 x 6.9 inches
- Item Weight: 12.10 Pounds
- Fitment Type: Direct Replacement
- Part Description: 2003 GMC Sierra 3500 Engine Exhaust Manifold (Machining)
Vehicle Fitment- 2003 GMC Sierra 3500 | Base, SL, SLE, SLT | 8 Cyl 8.1 L GAS
OEM (Genuine) 2003 GMC Sierra 3500 Engine Exhaust Manifold (Machining)(W/Out Air Injector Reactor)
PartNumber: 12557287Product Specifications- Notes: All Models; 8.1l; Left; All; 8.1 Liter Gas
- Location: Driver Side
- Other Names: Exhaust Manifold, Manifold
- Item Dimensions: 25.5 x 10.5 x 6.2 inches
- Item Weight: 16.80 Pounds
- Fitment Type: Direct Replacement
- Part Description: 2003 GMC Sierra 3500 Engine Exhaust Manifold (Machining)(W/Out Air Injector Reactor)
Vehicle Fitment- 2003 GMC Sierra 3500 | Base, SL, SLE, SLT, WT | 8 Cyl 8.1 L GAS
OEM (Genuine) 2003 GMC Sierra 3500 Engine Exhaust Manifold
PartNumber: 97224587
Product Specifications- Notes: All Models; 6.6l; Left; 6.6 Liter Turbo Diesel, 1st Design
- Location: Driver Side
- Other Names: Exhaust Manifold
- Item Dimensions: 23.9 x 4.6 x 4.8 inches
- Item Weight: 0.60 Pounds
- Fitment Type: Direct Replacement
- Part Description: 2003 GMC Sierra 3500 Engine Exhaust Manifold
Vehicle Fitment- 2003 GMC Sierra 3500 | Base, SL, SLE, SLT, WT | 8 Cyl 6.6 L DIESEL
FAQ for Exhaust Manifold Repair
Q: How to remove the exhaust manifold?
A:
You can remove the exhaust manifold pipe nuts, the spark plugs, the exhaust manifold bolts, the manifold, the gasket, the heat shield bolts, and the shield from the exhaust manifold.
By Bob
GM Specialist
01/11/2022Q: What is the installation procedure for the exhaust manifold?
A:
You can install the heat shield, and bolts, tighten the bolts to 9 Nm (80 inch lbs.), install the exhaust manifold, new gasket, and bolts, and tighten the bolts a first pass to 15 Nm (11 ft. lbs.) and the bolts a final pass to 25 Nm (18 ft. lbs.), and then install the spark plugs.
By Bob
GM Specialist
01/11/2022Q: How to install the exhaust manifold?
A:
You can install the heat shield, and bolts, the exhaust manifold, the new gasket, and bolts, tighten the bolts a first pass to 15 Nm (11 ft. lbs.), the bolts a final pass to 25 Nm(18 ft. lbs.), install the spark plugs, the exhaust manifold pipe nuts, and tighten the nuts to 50 Nm (37 ft. lbs.).
By Bob
GM Specialist
01/11/2022Q: What is the removal procedure for the exhaust manifold?
A:
You can remove the exhaust manifold pipe nuts, the spark plugs, the exhaust manifold bolts, the manifold, and gasket, the heat shield bolts, and the shield from the exhaust manifold.
By Bob
GM Specialist
01/11/2022