How to replace the left exhaust manifold on 4.8L, 5.3L, and 6.0L engines on GMC Sierra 1500?

You must start by raising and supporting the vehicle before removing Exhaust Manifold pipe nuts on 4.8l, 5.3l and 6.0l engines. Start by lowering the vehicle before continuing to uninstall the spark plugs followed by Exhaust Manifold bolts and finally removing the manifold together with its gasket which requires disposal. The mechanic must take heat shield bolts and shield out from the Exhaust Manifold when needed. Begin with cleaning an inspection of the Exhaust Manifold before installing the heat shield along with its bolts to the Exhaust Manifold which needs 9 nm (80 inch lbs.) torque during bolt tightening. Threadlock gm p/n 12345493 (Canadian P/N 10953488) should be used to coat a 5 mm (0.2 inch) wide area around the Exhaust Manifold bolts while ensuring the cylinder head Exhaust Manifold bolt hole threads stay free from debris and threadlocking material and threadlock should not be applied to the initial three bolt threads. Fasten the bolts of the Exhaust Manifold with an initial 15 nm (11 ft. Lbs.) torque starting from the middle two bolts before proceeding to tighten alternating bolts from side to side all the way to the outer bolts. A final torque of 25 nm (18 ft. Lbs.) using the same sequence should be applied. A flat punch should be used to bend the exposed Exhaust Manifold gasket at the rear of the left cylinder head before spark plugs can be installed. The next step is to raise the vehicle for Exhaust Manifold pipe nut installation followed by torquing them to 50 nm (37 ft. Lbs.) until completion of the procedure by lowering the vehicle.

OEM GMC Sierra 1500 Exhaust Manifold

Engine Exhaust Manifold

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21 Exhaust Manifolds found

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GMC Sierra 1500 Exhaust Manifold, Passenger Side
Part Number: 12574320
$168.06 MSRP: $264.43
You Save: $96.37 (37%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Manifold, Engine Exhaust Manifold
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2007 GMC Sierra 1500 | Base, HT, SL, SLE, SLT, WT | 6 Cyl 4.3 L GAS
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GMC Sierra 1500 Exhaust Manifold, Driver Side
Part Number: 12631812
$144.48 MSRP: $227.33
You Save: $82.85 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Manifold, Engine Exhaust Manifold
- Position: Driver Side
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2018 GMC Sierra 1500 | Base, Denali, SLE, SLT | 6 Cyl 4.3 L FLEX, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 5.3 L MILD HYBRID EV-GAS (MHEV), 8 Cyl 6.2 L GAS
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GMC Sierra 1500 Exhaust Manifold, Driver Side
Part Number: 12616285
$129.10 MSRP: $219.79
You Save: $90.69 (42%)
ADD TO CART
Product Specifications
- Other Name: Manifold, Engine Exhaust Manifold; Manifold
- Position: Driver Side
- Replaces: 12602037, 12562235, 12571678, 12564155
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2013 GMC Sierra 1500 | Base, C3, Denali, HT, Hybrid, SL, SLE, SLT, WT, XFE | 8 Cyl 4.8 L FLEX, 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L FULL HYBRID EV-GAS (FHEV), 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L FULL HYBRID EV-FLEX (FHEV), 8 Cyl 6.0 L FULL HYBRID EV-GAS (FHEV), 8 Cyl 6.0 L GAS, 8 Cyl 6.2 L FLEX, 8 Cyl 6.2 L GAS
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GMC Sierra 1500 Exhaust Manifold, Passenger Side
Part Number: 12629338
$154.58 MSRP: $263.16
You Save: $108.58 (42%)
ADD TO CART
Product Specifications
- Other Name: Manifold, Engine Exhaust Manifold; Manifold
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2019 GMC Sierra 1500 | AT4, Base, Denali, Elevation, SLE, SLT | 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 5.3 L MILD HYBRID EV-GAS (MHEV), 8 Cyl 6.2 L GAS
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GMC Sierra 1500 Exhaust Manifold, Passenger Side
Part Number: 12668118
$78.21 MSRP: $122.49
You Save: $44.28 (37%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Manifold-Exhaust (Right-Hand); Manifold, Engine Exhaust Manifold
- Position: Passenger Side
- Replaced by: 12701709
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2019-2021 GMC Sierra 1500 | Base | 6 Cyl 4.3 L GAS
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GMC Sierra 1500 Exhaust Manifold, Driver Side
Part Number: 12668117
$73.35 MSRP: $114.87
You Save: $41.52 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Manifold, Engine Exhaust Manifold
- Position: Driver Side
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2019-2021 GMC Sierra 1500 | Base | 6 Cyl 4.3 L GAS
View related parts
GMC Sierra 1500 Exhaust Manifold, Driver Side
Part Number: 12629337
$154.58 MSRP: $263.16
You Save: $108.58 (42%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Manifold, Engine Exhaust Manifold; Manifold
- Position: Driver Side
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2019 GMC Sierra 1500 | AT4, Base, Denali, Elevation, SLE, SLT | 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 5.3 L MILD HYBRID EV-GAS (MHEV), 8 Cyl 6.2 L GAS
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GMC Sierra 1500 Exhaust Manifold
Part Number: 12677665
$207.21 MSRP: $355.86
You Save: $148.65 (42%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Manifold, Engine Exhaust Manifold; Manifold
- Replaces: 12648339
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2013, 2002 GMC Sierra 1500 | Base, Denali, HT, Hybrid, SL, SLE, SLT, WT, XFE | 8 Cyl 4.8 L FLEX, 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L FULL HYBRID EV-GAS (FHEV), 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L FULL HYBRID EV-FLEX (FHEV), 8 Cyl 6.0 L FULL HYBRID EV-GAS (FHEV), 8 Cyl 6.0 L GAS, 8 Cyl 6.2 L FLEX, 8 Cyl 6.2 L GAS
View related parts
GMC Sierra 1500 Exhaust Manifold, Passenger Side
Part Number: 12631813
$137.59 MSRP: $216.49
You Save: $78.90 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Manifold, Engine Exhaust Manifold
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2018 GMC Sierra 1500 | Base, Denali, SLE, SLT | 6 Cyl 4.3 L FLEX, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 5.3 L MILD HYBRID EV-GAS (MHEV), 8 Cyl 6.2 L GAS
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GMC Sierra 1500 Exhaust Manifold
Part Number: 55513001
$116.63 MSRP: $172.58
You Save: $55.95 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Manifold, Engine Exhaust Manifold
- Replaced by: 40009493
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2020-2023 GMC Sierra 1500 | AT4, AT4X, Denali, Denali Ultimate, Elevation, SLE, SLT | 6 Cyl 3.0 L DIESEL
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GMC Sierra 1500 Exhaust Manifold, Driver Side
Part Number: 12592082
$179.14 MSRP: $246.00
You Save: $66.86 (28%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Manifold, Engine Exhaust Manifold
- Position: Driver Side
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2013 GMC Sierra 1500 | WT | 6 Cyl 4.3 L GAS
View related parts
GMC Sierra 1500 Exhaust Manifold, Passenger Side
Part Number: 12592083
$188.58 MSRP: $296.72
You Save: $108.14 (37%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Manifold, Engine Exhaust Manifold
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2013 GMC Sierra 1500 | WT | 6 Cyl 4.3 L GAS
View related parts
GMC Sierra 1500 Exhaust Manifold, Driver Side
Part Number: 12701710
$105.96 MSRP: $165.97
You Save: $60.01 (37%)
ADD TO CART
Product Specifications
- Other Name: Manifold, Engine Exhaust Manifold
- Position: Driver Side
- Replaced by: 12701713
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2019-2023 GMC Sierra 1500 | AT4, AT4X, Base, Denali, Denali Ultimate, Elevation, Pro, SLE, SLT | 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.2 L GAS
View related parts
GMC Sierra 1500 Exhaust Manifold, Passenger Side
Part Number: 12701711
$58.13 MSRP: $91.05
You Save: $32.92 (37%)
ADD TO CART
Product Specifications
- Other Name: Manifold, Engine Exhaust Manifold
- Position: Passenger Side
- Replaced by: 12701712
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2019-2023 GMC Sierra 1500 | AT4, AT4X, Base, Denali, Denali Ultimate, Elevation, Pro, SLE, SLT | 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.2 L GAS
View related parts
GMC Sierra 1500 Exhaust Manifold, Driver Side
Part Number: 12575342
$191.33 MSRP: $301.05
You Save: $109.72 (37%)
Product Specifications
- Other Name: Manifold, Engine Exhaust Manifold
- Position: Driver Side
- Replaces: 12562775
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2002 GMC Sierra 1500 | Base, HT, SL, SLE, SLT, WT | 6 Cyl 4.3 L GAS
View related parts
GMC Sierra 1500 Exhaust Manifold, Driver Side
Part Number: 12574406
Product Specifications
- Other Name: Manifold, Engine Exhaust Manifold
- Position: Driver Side
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2003-2007 GMC Sierra 1500 | Base, SL, SLE, SLT, WT | 6 Cyl 4.3 L GAS
View related parts
GMC Sierra 1500 Exhaust Manifold, Passenger Side
Part Number: 12562408
Product Specifications
- Other Name: Manifold Assembly-Exhaust-Right-Hand; Manifold, Engine Exhaust Manifold
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2000 GMC Sierra 1500 | SL, SLE, SLT | 6 Cyl 4.3 L GAS
View related parts
GMC Sierra 1500 Exhaust Manifold, Driver Side
Part Number: 12563198
Product Specifications
- Other Name: Manifold Assembly-Exhaust-Left-Hand; Manifold, Engine Exhaust Manifold
- Position: Driver Side
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2000 GMC Sierra 1500 | SL, SLE, SLT | 6 Cyl 4.3 L GAS
View related parts
GMC Sierra 1500 Exhaust Manifold, Passenger Side
Part Number: 12564161
Product Specifications
- Other Name: Manifold, Engine Exhaust Manifold; Manifold
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2001 GMC Sierra 1500 | SL, SLE, SLT | 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L GAS
View related parts
GMC Sierra 1500 Exhaust Manifold, Driver Side
Part Number: 12571679
Product Specifications
- Other Name: Manifold, Engine Exhaust Manifold; Manifold
- Position: Driver Side
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2002 GMC Sierra 1500 | Base, HT, SL, SLE, SLT, WT | 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS

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GMC Sierra 1500 Exhaust Manifold

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GMC Sierra 1500 Exhaust Manifold Parts Questions & Experts Answers

Exhaust Manifold
12677665
Q: How to replace the left exhaust manifold on 4.8L, 5.3L, and 6.0L engines on GMC Sierra 1500?
A: You must start by raising and supporting the vehicle before removing Exhaust Manifold pipe nuts on 4.8l, 5.3l and 6.0l engines. Start by lowering the vehicle before continuing to uninstall the Spark Plugs followed by Exhaust Manifold bolts and finally removing the manifold together with its gasket which requires disposal. The mechanic must take heat shield bolts and shield out from the Exhaust Manifold when needed. Begin with cleaning an inspection of the Exhaust Manifold before installing the heat shield along with its bolts to the Exhaust Manifold which needs 9 nm (80 inch lbs.) torque during bolt tightening. Threadlock gm p/n 12345493 (Canadian P/N 10953488) should be used to coat a 5 mm (0.2 inch) wide area around the Exhaust Manifold bolts while ensuring the cylinder head Exhaust Manifold bolt hole threads stay free from debris and threadlocking material and threadlock should not be applied to the initial three bolt threads. Fasten the bolts of the Exhaust Manifold with an initial 15 nm (11 ft. Lbs.) torque starting from the middle two bolts before proceeding to tighten alternating bolts from side to side all the way to the outer bolts. A final torque of 25 nm (18 ft. Lbs.) using the same sequence should be applied. A flat punch should be used to bend the exposed Exhaust Manifold gasket at the rear of the left cylinder head before spark plugs can be installed. The next step is to raise the vehicle for Exhaust Manifold pipe nut installation followed by torquing them to 50 nm (37 ft. Lbs.) until completion of the procedure by lowering the vehicle.