How to remove and install the left exhaust manifold on a 4.3L engine on Chevrolet Silverado 1500?

A 4.3l engine requires vehicle support before you can remove the left Exhaust Manifold by first taking off the Exhaust Manifold pipe nuts then lowering the vehicle. Extract each Spark Plug wire from its Spark Plug before uninstalling the Spark Plug wire retainer bolts which should be placed atop the engine. Next disconnect the engine coolant temperature (ECT) sensor electrical connector while taking out the spark plugs. Start the Exhaust Manifold and Spark Plug wire shield removal by taking off bolts/studs securing both pieces. After that remove both shields while discarding the Exhaust Manifold gaskets. Wait to begin if you need to remove Exhaust Manifold heat shield bolts then discarding the shield while cleaning all gasket-smashing areas. Place the Exhaust Manifold heat shield back onto position while installing its retaining bolts to reach 9 nm torque (80 inch lbs.). Couples of new Exhaust Manifold gaskets should be installed onto the Exhaust Manifold while making sure the gasket tabs maintain contact between the gasket and bolts. The Exhaust Manifold and plug wire shields should be installed while gm p/n 12345493 (Canadian P/N 10953488) or equivalent threadlock material is applied to old Exhaust Manifold bolts/stud threads before tightening to 30 nm (22 ft. Lbs.). Reconnect the ect sensor electrical connector followed by installing the spark plugs which must be tightened to 15 nm (11 ft lbs). Afterward install the wire harness toward the engine then secure the Spark Plug wire retainer bolts at 12 nm (106 inch lbs). Finish the installation by attaching the Spark Plug Wires to the spark plugs then raising the vehicle to install Exhaust Manifold pipe nuts before tightening them to 50 nm (37 ft. Lbs.) while avoiding vehicle descent.

OEM Chevrolet Silverado 1500 Exhaust Manifold

Engine Exhaust Manifold

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21 Exhaust Manifolds found

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Chevrolet Silverado 1500 Exhaust Manifold, Passenger Side
Part Number: 12574320
$163.96 MSRP: $257.98
You Save: $94.02 (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 Chevrolet Silverado 1500 | Base, LS, LT, WT | 6 Cyl 4.3 L GAS
View related parts
Chevrolet Silverado 1500 Exhaust Manifold, Driver Side
Part Number: 12631812
$144.48 MSRP: $211.25
You Save: $66.77 (32%)
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 Chevrolet Silverado 1500 | Custom, High Country, LS, LT, LTZ, SSV, WT | 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
View related parts
Chevrolet Silverado 1500 Exhaust Manifold, Passenger Side
Part Number: 12629338
$136.84 MSRP: $235.01
You Save: $98.17 (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 Chevrolet Silverado 1500 | Custom, Custom Trail Boss, High Country, LS, LT, LT Trail Boss, LTZ, RST, SSV, WT | 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
View related parts
Chevrolet Silverado 1500 Exhaust Manifold, Driver Side
Part Number: 12616285
$117.36 MSRP: $171.88
You Save: $54.52 (32%)
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 Chevrolet Silverado 1500 | Base, Hybrid, LS, LT, LTZ, SS, WT, XFE, Z71 Off-Road | 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
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Chevrolet Silverado 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 Chevrolet Silverado 1500 | Custom, Custom Trail Boss, WT | 6 Cyl 4.3 L GAS
View related parts
Chevrolet Silverado 1500 Exhaust Manifold, Driver Side
Part Number: 12629337
$150.51 MSRP: $258.49
You Save: $107.98 (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 Chevrolet Silverado 1500 | Custom, Custom Trail Boss, High Country, LS, LT, LT Trail Boss, LTZ, RST, SSV, WT | 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
View related parts
Chevrolet Silverado 1500 Exhaust Manifold, Passenger Side
Part Number: 12668118
$78.21 MSRP: $122.49
You Save: $44.28 (37%)
Ships in 1-3 Business Days
ADD TO CART
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 Chevrolet Silverado 1500 | Custom, Custom Trail Boss, WT | 6 Cyl 4.3 L GAS
View related parts
Chevrolet Silverado 1500 Exhaust Manifold
Part Number: 12677665
$199.07 MSRP: $338.92
You Save: $139.85 (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 Chevrolet Silverado 1500 | Base, Hybrid, LS, LT, LTZ, SS, WT, XFE, Z71 Off-Road | 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
View related parts
Chevrolet Silverado 1500 Exhaust Manifold, Passenger Side
Part Number: 12631813
$127.16 MSRP: $202.74
You Save: $75.58 (38%)
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 Chevrolet Silverado 1500 | Custom, High Country, LS, LT, LTZ, SSV, WT | 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
View related parts
Chevrolet Silverado 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 Chevrolet Silverado 1500 | Custom Trail Boss, High Country, LT, LT Trail Boss, LTZ, RST | 6 Cyl 3.0 L DIESEL
View related parts
Chevrolet Silverado 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 Chevrolet Silverado 1500 | LS, WT | 6 Cyl 4.3 L GAS
View related parts
Chevrolet Silverado 1500 Exhaust Manifold, Passenger Side
Part Number: 12592083
$188.58 MSRP: $256.30
You Save: $67.72 (27%)
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 Chevrolet Silverado 1500 | LS, WT | 6 Cyl 4.3 L GAS
View related parts
Chevrolet Silverado 1500 Exhaust Manifold, Driver Side
Part Number: 12701710
$100.91 MSRP: $126.19
You Save: $25.28 (21%)
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 Chevrolet Silverado 1500 | Custom, Custom Trail Boss, High Country, LT, LT Trail Boss, LTZ, PPV, RST, SSV, WT, ZR2 | 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.2 L GAS
View related parts
Chevrolet Silverado 1500 Exhaust Manifold, Passenger Side
Part Number: 12701711
$56.71 MSRP: $88.82
You Save: $32.11 (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 Chevrolet Silverado 1500 | Custom, Custom Trail Boss, High Country, LT, LT Trail Boss, LTZ, PPV, RST, SSV, WT, ZR2 | 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.2 L GAS
View related parts
Chevrolet Silverado 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 Chevrolet Silverado 1500 | Base, LS, LT, WT | 6 Cyl 4.3 L GAS
View related parts
Chevrolet Silverado 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 Chevrolet Silverado 1500 | Base, LS, LT, WT | 6 Cyl 4.3 L GAS
View related parts
Chevrolet Silverado 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 Chevrolet Silverado 1500 | Base, LS, LT | 6 Cyl 4.3 L GAS
View related parts
Chevrolet Silverado 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 Chevrolet Silverado 1500 | Base, LS, LT | 6 Cyl 4.3 L GAS
View related parts
Chevrolet Silverado 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 Chevrolet Silverado 1500 | Base, LS, LT | 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L GAS
View related parts
Chevrolet Silverado 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 Chevrolet Silverado 1500 | Base, LS, LT, WT | 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS

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Chevrolet Silverado 1500 Exhaust Manifold

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Chevrolet Silverado 1500 Exhaust Manifold Parts Questions & Experts Answers

Exhaust Manifold
12677665
Q: How to remove and install the left exhaust manifold on a 4.3L engine on Chevrolet Silverado 1500?
A: A 4.3l engine requires vehicle support before you can remove the left Exhaust Manifold by first taking off the Exhaust Manifold pipe nuts then lowering the vehicle. Extract each Spark Plug wire from its Spark Plug before uninstalling the Spark Plug wire retainer bolts which should be placed atop the engine. Next disconnect the engine coolant temperature (ECT) sensor electrical connector while taking out the spark plugs. Start the Exhaust Manifold and Spark Plug wire shield removal by taking off bolts/studs securing both pieces. After that remove both shields while discarding the Exhaust Manifold gaskets. Wait to begin if you need to remove Exhaust Manifold heat shield bolts then discarding the shield while cleaning all gasket-smashing areas. Place the Exhaust Manifold heat shield back onto position while installing its retaining bolts to reach 9 nm torque (80 inch lbs.). Couples of new Exhaust Manifold gaskets should be installed onto the Exhaust Manifold while making sure the gasket tabs maintain contact between the gasket and bolts. The Exhaust Manifold and plug wire shields should be installed while gm p/n 12345493 (Canadian P/N 10953488) or equivalent threadlock material is applied to old Exhaust Manifold bolts/stud threads before tightening to 30 nm (22 ft. Lbs.). Reconnect the ect sensor electrical connector followed by installing the spark plugs which must be tightened to 15 nm (11 ft lbs). Afterward install the wire harness toward the engine then secure the Spark Plug wire retainer bolts at 12 nm (106 inch lbs). Finish the installation by attaching the Spark Plug Wires to the spark plugs then raising the vehicle to install Exhaust Manifold pipe nuts before tightening them to 50 nm (37 ft. Lbs.) while avoiding vehicle descent.