How to replace the automatic transmission Flywheel on GMC Sierra 1500?

The first step to replace an automatic transmission flex plate requires removing the transmission while recording engine Flywheel position prior to its removal. Take out all Flywheel bolts followed by the removal of the Flywheel. Two m11x1.5 mm bolts should be inserted into the threaded holes of the spacer before spinning them clockwise to detach the spacer from the Crankshaft rear. Apply longer Flywheel bolts when installing the spacer on Crankshaft assembly only if a spacer is currently in place. Install the Flywheel to the Crankshaft while applying threadlock to the Flywheel bolts according to specified part number for adhesives, fluids, and lubricants, sealers. Use the correct sequence when tightening the Flywheel bolts by applying 20 nm (15 lb ft) force first followed by 50 nm (37 lb ft) and finally reaching 100 nm (74 lb ft). The automatic transmission should go back into place after this process.

OEM GMC Sierra 1500 Flywheel

Clutch Flywheel

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GMC Sierra 1500 Drive Plate
Part Number: 12654640
$129.25 MSRP: $221.97
You Save: $92.72 (42%)
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Product Specifications
- Other Name: Plate, Engine Crankshaft; Flywheel
- Replaces: 12553054, 12602448, 12606620, 12637677, 12563136, 12580709
- 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 GAS
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GMC Sierra 1500 Drive Plate
Part Number: 12621399
$84.92 MSRP: $145.86
You Save: $60.94 (42%)
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Product Specifications
- Replaced by: 19260102
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2001-2006 GMC Sierra 1500 | Base, C3, Denali, SLE, SLT, WT | 8 Cyl 6.0 L GAS
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GMC Sierra 1500 Drive Plate
Part Number: 12620099
$67.06 MSRP: $114.16
You Save: $47.10 (42%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Plate, Engine Crankshaft
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2021 GMC Sierra 1500 | Base, Denali, SLE, SLT | 6 Cyl 4.3 L FLEX, 6 Cyl 4.3 L GAS, 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 Flywheel
Part Number: 12561680
$380.97 MSRP: $599.45
You Save: $218.48 (37%)
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Product Specifications
- Other Name: Flywheel, Engine Crankshaft
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2001-2006 GMC Sierra 1500 | Base, C3, Denali, HT, SL, SLE, SLT, WT | 8 Cyl 4.8 L GAS, 8 Cyl 6.0 L GAS
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GMC Sierra 1500 Drive Plate
Part Number: 12555640
$149.66 MSRP: $360.86
You Save: $211.20 (59%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Flywheel, Engine Crankshaft; Plate, Engine Crankshaft
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2013 GMC Sierra 1500 | Base, HT, SL, SLE, SLT, WT | 6 Cyl 4.3 L GAS
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GMC Sierra 1500 Drive Plate
Part Number: 55490601
$37.79 MSRP: $59.17
You Save: $21.38 (37%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Plate, Engine Crankshaft
- 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 Drive Plate
Part Number: 12663484
$15.83 MSRP: $26.06
You Save: $10.23 (40%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Plate, Engine Crankshaft
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2019-2023 GMC Sierra 1500 | Base, Elevation, Pro, SLE | 4 Cyl 2.7 L GAS
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GMC Sierra 1500 Flywheel
Part Number: 12557585
$421.38 MSRP: $605.96
You Save: $184.58 (31%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Flywheel, Engine Crankshaft
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2006 GMC Sierra 1500 | Base, HT, SL, SLE, SLT, WT | 6 Cyl 4.3 L GAS
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GMC Sierra 1500 Drive Plate
Part Number: 19117204
Product Specifications
- Other Name: Plate Assembly, Automatic Transmission Flexible; Rotor Plate; Plate, Engine Crankshaft
- Replaces: 12569647
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2006 GMC Sierra 1500 | Base, Denali, Hybrid, SLE, SLT, WT | 6 Cyl 4.3 L GAS, 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 GAS
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GMC Sierra 1500 Drive Plate
Part Number: 12597524
Product Specifications
- Other Name: Plate, Engine Crankshaft
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2012, 2009-2010 GMC Sierra 1500 | Hybrid | 8 Cyl 6.0 L FULL HYBRID EV-FLEX (FHEV), 8 Cyl 6.0 L FULL HYBRID EV-GAS (FHEV)
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GMC Sierra 1500 Flywheel
Part Number: 12561755
Product Specifications
- Other Name: Flywheel, Engine Crankshaft
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2000 GMC Sierra 1500 | SL, SLE, SLT | 8 Cyl 4.8 L GAS

GMC Sierra 1500 Flywheel

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GMC Sierra 1500 Flywheel Parts Questions & Experts Answers

Drive Plate
12555640
Q: How to replace the automatic transmission Flywheel on GMC Sierra 1500?
A: The first step to replace an automatic transmission flex plate requires removing the transmission while recording engine Flywheel position prior to its removal. Take out all Flywheel bolts followed by the removal of the Flywheel. Two m11x1.5 mm bolts should be inserted into the threaded holes of the spacer before spinning them clockwise to detach the spacer from the Crankshaft rear. Apply longer Flywheel bolts when installing the spacer on Crankshaft assembly only if a spacer is currently in place. Install the Flywheel to the Crankshaft while applying threadlock to the Flywheel bolts according to specified part number for adhesives, fluids, and lubricants, sealers. Use the correct sequence when tightening the Flywheel bolts by applying 20 nm (15 lb ft) force first followed by 50 nm (37 lb ft) and finally reaching 100 nm (74 lb ft). The automatic transmission should go back into place after this process.