How to replace the engine front timing cover on GMC Sierra 1500?

To replace engine front cover, ensure that the Water Pump, crankshaft balancer, and Oil Pan are removed and then removed the engine shield bolts and shield. Remove the clip of the engine wire harness from the front cover and remove the crankshaft position (CKP) electric connector . Take off the bolt attached to the ckp sensor and the sensor itself, dispose of the ckp sensor o-ring seal. Unplug the engine wiring harness electrical connector from the camshaft position (CMP) sensor wiring harness jumper, then, take off the cmp sensor bolt and take out the cmp sensor and the wiring harness jumper from the engine front cover. Unplug the cmp sensor's wiring harness jumper from the cmp sensor, take cmp sensor off the wiring harness jumper. Next, take off front cover bolts and dispose of the front cover while removing front cover carefully to clean all sealing surfaces before installing a new covering. Replace the front cover bolts, fastening it to 12 n.m (106 lb in), do not reuse the original o-ring seal. If the old cmp sensor is to be reinstalled; install a new o-ring seal onto the sensor and install the cmp sensor on the wire harness jumper and connect the cmp sensor wire harness jumper to the cmp sensor. Apply clean engine oil to the o-ring seal and then mount the cmp sensor and wiring harness jumper to the engine front cover, tight in place the cmp sensor bolt by 10 n.m (89 lb in). Join the engine wiring harness transformer from the cmp sensor wiring harness jumper. Make sure not to use the original ckp sensor angle wire seal again. Fresh engine oil to lubricate a new ckp sensor o-ring seal and fit it to the ckp sensor with the bolt to 8 n.m (71 lb in) tight. Ensure that the sensor is fully seated before tightening the bolt to 8 n.m (71 lb in). Connect the ckp sensor electrical connector and the engine wire harness clip to the front cover. Lastly, the engine shield and bolts should be installed and tightened to 20 n. M (15 lb ft), then the Oil Pan, crankshaft balancer and Water Pump.

How to replace the engine front timing cover on GMC Yukon?

If you are to change the engine front cover, remove the Water Pump and crankshaft balancer first. Unplug the cmp sensor wire harness from cmp actuator magnet and the engine harness from cmp sensorarness. The next step is to remove Oil Pan to front cover bolts and front cover bolts (501), after which the front cover (502) should be removed along with its gasket (503) which should be discarded. Strip the crankshaft front oil seal off it and in case of changing the engine front cover take off the cmp sensor wire harness and bolts and disconnecting it from the cmp sensor off and besides taking off the cmp sensor wire harness and the cmp sensor (703) and cmp actuator magnet bolts (751) and magnet (752) but discarding cmp actuator magnet gasket (753). For installation, do not use the reused crankshaft oil seal or the front cover gasket and do not apply the sealant to the front cover gasket in the absence of instructions. Use the en-48853 front cover alignment tool which will adjust the crankshaft front oil seal properly. Install a new cmp actuator magnet gasket (753), put the cmp actuator magnet (752) and bolts (751) on and tighten them to 12 nm (106 lb in) check the cmp sensor o-ring seal (704) for damage, lubricate its o-ring with clean engine oil and install the cmp sensor (703). Mount the cmp sensor wire harness to the front cover, attach it to the compressor pressure sensor, tighten the cmp sensor wire harness bolts to 12 nm (106 lb in), and apply gasket between the wire harness and the front cover. Put a 5 mm, 20 mm 0.20in,0.80in length bead of sealant on the Oil Pan, the Oil Pan to engine block junction ,and then to position the new engine front cover gasket (503) and front cover (502) on the engine. Putting in front cover bolts (501) until snug in sequence avoiding overtightening, oil pan to front cover bolts in finger-tight sequence. Install the crank shaft balancer bolt partially tight then tighten the Oil Pan to front cover at 25 nm (18 lb ft) then tighten the engine front cover bolts at 25 nm (18 lb ft). Unplug the tools, place the cmp sensor, and connect the engine harness electrical connector to the cmp sensor wire harness electrical connector and the Camshaft Position Sensor wire harness electrical connector to the cmp actuator magnet. Finally, seal a new crankshaft front oil seal and also the Water Pump.

OEM GMC Timing Cover

Engine Timing Cover

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GMC Front Cover Part Number: 12600326
$43.02 MSRP: $75.05
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Product Specifications
- Other Name: Cover-Engine Front (Machining); Timing Cover
- Position: Front
Fits the following GMC Models:
- Yukon | 2007-2009 | SLE, SLT | 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS
- Yukon XL 1500 | 2007-2009 | SLE, SLT | 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS
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GMC Timing Cover, Front Part Number: 12594939
$45.81 MSRP: $79.95
You Save: $34.14 (43%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Cover-Engine Front (Machining); Front Cover; Cover, Engine Front Cover
- Position: Front
Fits the following GMC Models:
- Canyon | 2010-2012 | SLE, SLT | 8 Cyl 5.3 L GAS
- Savana 1500 | 2010-2014 | Base, LS, LT | 8 Cyl 5.3 L FLEX
- Savana 2500 | 2010-2020 | Base, LS, LT | 8 Cyl 4.8 L FLEX, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS
- Savana 3500 | 2010-2020 | Base, LS, LT | 8 Cyl 4.8 L FLEX, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS
- Sierra 1500 | 2010-2013 | Denali, Hybrid, SL, SLE, SLT, WT, XFE | 8 Cyl 4.8 L FLEX, 8 Cyl 5.3 L FLEX, 8 Cyl 6.0 L FULL HYBRID EV-FLEX (FHEV), 8 Cyl 6.2 L FLEX
- Sierra 2500 HD | 2010-2019 | Base, Denali, SLE, SLT, WT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS
- Sierra 3500 HD | 2010-2019 | Base, Denali, SLE, SLT, WT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS
- Yukon | 2007-2014 | Denali, SLE, SLT | 8 Cyl 5.3 L FLEX, 8 Cyl 6.2 L FLEX, 8 Cyl 6.2 L GAS
- Yukon XL 1500 | 2007-2014 | Denali, SLE, SLT | 8 Cyl 5.3 L FLEX, 8 Cyl 6.0 L GAS, 8 Cyl 6.2 L FLEX, 8 Cyl 6.2 L GAS
- Yukon XL 2500 | 2007-2013 | SLE, SLT | 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS
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GMC Timing Cover, Front Part Number: 12691692
$57.73 MSRP: $100.73
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Product Specifications
- Other Name: Cover-Engine Front (Machining); Front Cover; Cover, Engine Front Cover
- Position: Front
- Replaces: 12688496, 12621363, 12693267
Fits the following GMC Models:
- Savana 2500 | 2021-2025 | Base, LS, LT | 8 Cyl 6.6 L GAS
- Savana 3500 | 2021-2025 | Base, LS, LT | 8 Cyl 6.6 L GAS
- Sierra 1500 | 2014-2025 | AT4, AT4X, Base, Denali, Denali Ultimate, 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
- Sierra 1500 Limited | 2022, 2019 | AT4, Base, Denali, SLE, SLT | 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.2 L GAS
- Sierra 2500 HD | 2020-2025 | AT4, AT4X, Base, Denali, Pro, SLE, SLT | 8 Cyl 6.6 L FLEX, 8 Cyl 6.6 L GAS
- Sierra 3500 HD | 2020-2025 | AT4, Base, Denali, Pro, SLE, SLT | 8 Cyl 6.6 L FLEX, 8 Cyl 6.6 L GAS
- Yukon | 2015-2025 | AT4, Denali, Denali Ultimate, SLE, SLT | 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.2 L FLEX, 8 Cyl 6.2 L GAS
- Yukon XL | 2015-2025 | AT4, Denali, Denali Ultimate, SLE, SLT | 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.2 L FLEX, 8 Cyl 6.2 L GAS
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GMC Timing Cover Part Number: 12633906
$110.64 MSRP: $193.06
You Save: $82.42 (43%)
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Product Specifications
- Other Name: Cover Assembly-Engine Front; Front Cover; Cover, Engine Front Cover
- Replaces: 12561243
Fits the following GMC Models:
- Envoy XL | 2003-2004 | SLE, SLT | 8 Cyl 5.3 L GAS
- Envoy XUV | 2004 | SLE, SLT | 8 Cyl 5.3 L GAS
- Savana 1500 | 2003-2007 | Base, LS, LT, SLE | 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS
- Savana 2500 | 2003-2007 | Base, LS, LT, SLE | 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS
- Savana 3500 | 2003-2007 | Base, LS, LT, SLE | 8 Cyl 4.8 L GAS, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS
- Sierra 1500 | 1999-2007 | Base, C3, Denali, HT, Hybrid, SL, SLE, SLT, WT | 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, 8 Cyl 6.2 L GAS
- Sierra 1500 Classic | 2007 | Denali, Hybrid, SL, SLE, SLT, WT | 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
- Sierra 1500 HD | 2005-2006, 2001-2003 | SLE, SLT | 8 Cyl 6.0 L GAS
- Sierra 1500 HD Classic | 2007 | SLE, SLT | 8 Cyl 6.0 L GAS
- Sierra 2500 | 1999-2004 | Base, SL, SLE, SLT, WT | 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L BI-FUEL, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS
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GMC Oil Pump, Green Line, Front Part Number: 12637040
$196.17 MSRP: $342.30
You Save: $146.13 (43%)
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Product Specifications
- Other Name: Cover, Engine Front Cover; Timing Cover; Front Cover; Cover Assembly
- Position: Front
- Replaces: 12584621, 12582069, 12606580, 24450057
Fits the following GMC Models:
- Terrain | 2010-2017 | Denali, SL, SLE, SLT | 4 Cyl 2.4 L FLEX, 4 Cyl 2.4 L GAS
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GMC Timing Cover Part Number: 89017261
$71.09 MSRP: $121.03
You Save: $49.94 (42%)
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Product Specifications
- Other Name: Cover, Engine Front Cover; Front Cover
- Replaces: 12554557
Fits the following GMC Models:
- C1500 | 1995 | Sierra SL, Sierra SLE, Sierra SLT, Sierra Special | 6 Cyl 4.3 L GAS
- C2500 | 1995 | Sierra SL, Sierra SLE | 6 Cyl 4.3 L GAS
- G1500 | 1995 | Vandura | 6 Cyl 4.3 L GAS
- G2500 | 1995 | Rally, Rally STX, Vandura | 6 Cyl 4.3 L GAS
- G3500 | 1995-1996 | Magnavan, Rally, Rally Camper Special, Rally STX, Vandura, Vandura Special | 6 Cyl 4.3 L GAS
- K1500 | 1995 | Sierra SL, Sierra SLE, Sierra SLS, Sierra SLT, Sierra Special | 6 Cyl 4.3 L GAS
- K2500 | 1995 | Sierra SL, Sierra SLE | 6 Cyl 4.3 L GAS
- P3500 | 1995-1996 | Base | 6 Cyl 4.3 L GAS
- Safari | 1996-1997 | Base, SL, SLE, SLT, SLX | 6 Cyl 4.3 L GAS
- Sonoma | 1995 | SL, SLE, SLS | 6 Cyl 4.3 L GAS
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GMC Timing Cover Part Number: 93445880
$95.15 MSRP: $156.74
You Save: $61.59 (40%)
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Product Specifications
- Other Name: Cover Assembly-Engine Front; Front Cover; Cover, Engine Front Cover
Fits the following GMC Models:
- Safari | 2005 | Base, SLE, SLT | 6 Cyl 4.3 L GAS
- Savana 1500 | 2005-2007 | Base, LS, LT, SLE | 6 Cyl 4.3 L GAS
- Savana 2500 | 2005-2006 | Base, SLE | 6 Cyl 4.3 L GAS
- Sierra 1500 | 2005-2007 | Base, SL, WT | 6 Cyl 4.3 L GAS
- Sierra 1500 Classic | 2007 | SL, WT | 6 Cyl 4.3 L GAS
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GMC Timing Cover, Front Part Number: 12589846
$116.73 MSRP: $192.25
You Save: $75.52 (40%)
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Product Specifications
- Other Name: Cover, Engine Front Cover; Front Cover; Cover, Engine Cover Front
- Position: Front
- Replaced by: 12742394
Fits the following GMC Models:
- Sierra 2500 HD | 2004-2006 | Base, SL, SLE, SLT, WT | 8 Cyl 8.1 L GAS
- Sierra 2500 HD Classic | 2007 | SL, SLE, SLT, WT | 8 Cyl 8.1 L GAS
- Sierra 3500 | 2004-2006 | Base, SL, SLE, SLT, WT | 8 Cyl 8.1 L GAS
- Sierra 3500 Classic | 2007 | SL, SLE, SLT, WT | 8 Cyl 8.1 L GAS
- Yukon XL 2500 | 2004-2006 | SLE, SLT | 8 Cyl 8.1 L GAS
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GMC Cover, Engine Front Cover Part Number: 12731560
$35.00 MSRP: $61.09
You Save: $26.09 (43%)
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Product Specifications
- Other Name: Cover, Engine Cover Front
- Position: Front
- Replaces: 12663262, 12707674, 12716029
Fits the following GMC Models:
- Canyon | 2023-2025 | AT4, AT4X, Denali, Elevation | 4 Cyl 2.7 L GAS
- Sierra 1500 | 2019-2025 | Base, Elevation, Pro, SLE | 4 Cyl 2.7 L GAS
- Sierra 1500 Limited | 2022 | Elevation, Pro, SLE | 4 Cyl 2.7 L GAS
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GMC Front Cover Part Number: 12716029
$35.00 MSRP: $61.09
You Save: $26.09 (43%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Cover Assembly-Engine Front; Timing Cover; Lower Timing Cover
- Position: Front
- Replaced by: 12731560
Fits the following GMC Models:
- Canyon | 2023-2025 | AT4, AT4X, Denali, Elevation | 4 Cyl 2.7 L GAS
- Sierra 1500 | 2019-2025 | Base, Elevation, Pro, SLE | 4 Cyl 2.7 L GAS
- Sierra 1500 Limited | 2022 | Elevation, Pro, SLE | 4 Cyl 2.7 L GAS
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GMC Rear Main Seal Retainer Part Number: 12705663
$82.96 MSRP: $144.75
You Save: $61.79 (43%)
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Product Specifications
- Other Name: Housing Assembly-Crankshaft Rear Oil Seal; Crankshaft Seal; Timing Cover
- Position: Rear
- Replaces: 12693213, 12665077, 12617790
Fits the following GMC Models:
- Savana 2500 | 2018-2024 | Base, LS, LT | 6 Cyl 4.3 L FLEX, 6 Cyl 4.3 L GAS
- Savana 3500 | 2018-2024 | Base, LS, LT | 6 Cyl 4.3 L FLEX, 6 Cyl 4.3 L GAS
- Sierra 1500 | 2014-2025 | AT4, AT4X, Base, Denali, Denali Ultimate, Elevation, Pro, 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
- Sierra 1500 Limited | 2022, 2019 | AT4, Base, Denali, Elevation, Pro, SLE, SLT | 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.2 L GAS
- Yukon | 2015-2025 | AT4, Denali, Denali Ultimate, Elevation, SLE, SLT | 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.2 L FLEX, 8 Cyl 6.2 L GAS
- Yukon XL | 2015-2025 | AT4, Denali, Denali Ultimate, Elevation, SLE, SLT | 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.2 L FLEX, 8 Cyl 6.2 L GAS
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GMC Timing Cover, Front Part Number: 14090022
$95.20 MSRP: $149.13
You Save: $53.93 (37%)
Product Specifications
- Other Name: Cover, Engine Front; Front Cover; Cover, Engine Front Cover
- Position: Front
Fits the following GMC Models:
- Sonoma | 1994-1997 | SL, SLE, SLS | 4 Cyl 2.2 L GAS
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GMC Timing Cover Part Number: 89017259
$100.88 MSRP: $158.02
You Save: $57.14 (37%)
Product Specifications
- Other Name: Cover, Engine Front Cover; Front Cover; Cover Kit, Engine Front Cover
- Replaces: 12554555
Fits the following GMC Models:
- C1500 | 1997-1998 | Sierra GT, Sierra SL, Sierra SLE, Sierra SLT, Sierra Special | 6 Cyl 4.3 L GAS
- Jimmy | 1995-2001 | Base, Diamond Edition, Envoy, SL, SLE, SLS, SLT | 6 Cyl 4.3 L GAS
- K1500 | 1997-1998 | Sierra SL, Sierra SLE, Sierra SLT, Sierra Special | 6 Cyl 4.3 L GAS
- Safari | 1998-2004 | Base, SL, SLE, SLT, SLX | 6 Cyl 4.3 L GAS
- Savana 1500 | 1996-2004 | Base, SLE, SLT | 6 Cyl 4.3 L GAS
- Savana 2500 | 1996-2004 | Base, SLE, SLT | 6 Cyl 4.3 L GAS
- Savana 3500 | 2000-2002, 1997-1998 | Base, SLE, SLT | 6 Cyl 4.3 L GAS
- Sierra 1500 | 1999-2004 | Base, HT, SL, SLE, SLT, WT | 6 Cyl 4.3 L GAS
- Sonoma | 1995-2004 | SL, SLE, SLS | 6 Cyl 4.3 L GAS
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GMC Timing Cover Part Number: 97328860
$178.34 MSRP: $280.62
You Save: $102.28 (37%)
Product Specifications
- Other Name: Cover, Engine Front
Fits the following GMC Models:
- Sierra 2500 HD | 2005 | Base, SLE, SLT, WT | 8 Cyl 6.6 L DIESEL
- Sierra 3500 | 2005 | Base, SLE, SLT, WT | 8 Cyl 6.6 L DIESEL
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GMC Timing Cover Part Number: 10044603
Product Specifications
- Other Name: Cover Assembly-Engine Front; Front Cover; Cover; Cover, Engine Front Cover
Fits the following GMC Models:
- S15 | 1985-1990 | Base, EL, Gypsy, High Sierra, Sierra Classic | 4 Cyl 2.5 L GAS
- S15 Jimmy | 1985-1988 | Base, Gypsy, High Sierra, Sierra Classic, Timberline | 4 Cyl 2.5 L GAS
- Safari | 1985-1990 | Base, SL, SLE, SLX | 4 Cyl 2.5 L GAS
- Sonoma | 1991-1993 | Base, SLE, SLS | 4 Cyl 2.5 L GAS
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GMC Timing Cover Part Number: 24576075
Product Specifications
- Other Name: Cover Assembly-Engine Front; Front Cover; Cover, Engine Front Cover
Fits the following GMC Models:
- Sonoma | 1998-2003 | SL, SLE, SLS | 4 Cyl 2.2 L FLEX, 4 Cyl 2.2 L GAS
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GMC Timing Cover Part Number: 12566113
Product Specifications
- Other Name: Cover Assembly-Engine Front
Fits the following GMC Models:
- Savana 3500 | 2001-2002 | Base, SLT | 8 Cyl 8.1 L GAS
- Sierra 2500 HD | 2001-2003 | Base, SL, SLE, SLT, WT | 8 Cyl 8.1 L GAS
- Sierra 3500 | 2001-2003 | Base, SL, SLE, SLT | 8 Cyl 8.1 L GAS
- Yukon XL 2500 | 2001-2003 | SLE, SLT | 8 Cyl 8.1 L GAS
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GMC Timing Cover, Front Part Number: 12561062
Product Specifications
- Other Name: Cover Assembly-Engine Front (W/Timing Indicator)
- Position: Front
- Replaces: 12555294
Fits the following GMC Models:
- C2500 | 1996-2000 | Sierra SL, Sierra SLE, Sierra SLT | 8 Cyl 7.4 L GAS
- C2500 Suburban | 1996-1999 | Base, SLE, SLT | 8 Cyl 7.4 L GAS
- C3500 | 1996-2000 | Sierra SL, Sierra SLE, Sierra SLT | 8 Cyl 7.4 L GAS
- K2500 | 1996-2000 | Sierra SL, Sierra SLE, Sierra SLT | 8 Cyl 7.4 L GAS
- K2500 Suburban | 1996-1999 | Base, SLE, SLT | 8 Cyl 7.4 L GAS
- K3500 | 1996-2000 | Sierra SL, Sierra SLE, Sierra SLT | 8 Cyl 7.4 L GAS
- Savana 3500 | 1996-2000 | Base, SLE | 8 Cyl 7.4 L GAS
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GMC Front Cover Part Number: 12628565
Product Specifications
- Other Name: Cover, Engine Front Cover; Timing Cover; Cover, Engine Cover Front
- Position: Front
- Replaces: 12601932, 12586647
Fits the following GMC Models:
- Canyon | 2004-2012 | SL, SLE, SLT, WT, Z71 Fleet, Z71 SL, Z71 SLE, Z85 SL, Z85 SLE | 4 Cyl 2.8 L GAS, 4 Cyl 2.9 L GAS, 5 Cyl 3.5 L GAS, 5 Cyl 3.7 L GAS
- Envoy | 2002-2009 | SLE, SLT | 6 Cyl 4.2 L GAS
- Envoy XL | 2002-2006 | SLE, SLT | 6 Cyl 4.2 L GAS
- Envoy XUV | 2004-2005 | SLE, SLT | 6 Cyl 4.2 L GAS
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GMC Timing Cover Part Number: 10222654
Product Specifications
- Other Name: Cover Assembly-Engine Front
- Replaces: 12522839
Fits the following GMC Models:
- C1500 | 1988-1997, 1984-1986 | Base, High Sierra, Sierra, Sierra Classic, Sierra GT, Sierra SL, Sierra SLE, Sierra SLT, Sierra SLX, Sierra Special | 8 Cyl 5.7 L GAS, 8 Cyl 6.2 L DIESEL, 8 Cyl 6.5 L DIESEL
- C1500 Suburban | 1995-1999, 1984-1986 | Base, High Sierra, SLE, SLT, Sierra Classic | 8 Cyl 6.2 L DIESEL, 8 Cyl 6.5 L DIESEL
- C2500 | 1988-2000, 1984-1986 | Base, High Sierra, Sierra, Sierra Classic, Sierra SL, Sierra SLE, Sierra SLT, Sierra SLX | 8 Cyl 5.7 L GAS, 8 Cyl 6.2 L DIESEL, 8 Cyl 6.5 L DIESEL
- C2500 Suburban | 1994-1999, 1984-1986 | Base, High Sierra, SLE, SLT, Sierra Classic | 8 Cyl 6.2 L DIESEL, 8 Cyl 6.5 L DIESEL
- C3500 | 1988-2000, 1984-1986 | Base, High Sierra, Sierra, Sierra Classic, Sierra SL, Sierra SLE, Sierra SLT, Sierra SLX | 8 Cyl 5.7 L GAS, 8 Cyl 6.2 L DIESEL, 8 Cyl 6.5 L DIESEL
- G2500 | 1984-1995 | Rally, Rally STX, Vandura | 8 Cyl 6.2 L DIESEL, 8 Cyl 6.5 L DIESEL
- G3500 | 1984-1996 | Magnavan, Rally, Rally Camper Special, Rally Custom, Rally STX, Vandura, Vandura Special | 8 Cyl 6.2 L DIESEL, 8 Cyl 6.5 L DIESEL
- Jimmy | 1984-1991 | Base, High Sierra, Sierra Classic | 8 Cyl 6.2 L DIESEL
- K1500 | 1988-1998, 1984-1986 | Base, High Sierra, Sierra, Sierra Classic, Sierra SL, Sierra SLE, Sierra SLS, Sierra SLT, Sierra SLX, Sierra Special, Sierra Sport | 8 Cyl 5.7 L GAS, 8 Cyl 6.2 L DIESEL, 8 Cyl 6.5 L DIESEL
- K1500 Suburban | 1995-1999, 1985-1986 | Base, High Sierra, SLE, SLT, Sierra Classic | 8 Cyl 6.2 L DIESEL, 8 Cyl 6.5 L DIESEL
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GMC Timing Cover

Choose OEM Timing Cover, you're making the optimal decision for superior quality and perfect performance. You can feel confident because each component goes through stringent quality checks. Every part is carefully built to comply with GMC's factory specifications. You'll enjoy a smooth, worry-free installation that fits just right. At ChevyPartsDeal.com, you'll find it easy to get top-quality OEM GMC Timing Cover. You can shop at highly competitive prices and protect your budget. All our genuine GMC parts include a dependable manufacturer's warranty. You'll also appreciate our straightforward return policy and swift delivery services for extra convenience.

GMC Timing Cover prevents the entry of grit and moisture and keeps your engine timing components active. The trucks and SUVs GMC created have a reputation of hauling, towing, and surviving rough backroads, though maintaining quiet cabins. Since 1901, the firm has endeavored to integrate stout frames, responsiveness in powertrains and easy technology which has ensured that drivers remain alert without being distracted. Strict testing, all-steel foundations, and the gimmick MultiPro tailgate indicate that the brand is not all fluff. Drivers prefer GMC as it does not make empty promises but miles of real work. Its safety features such as surround vision and hitch guidance provide users with clear sightlines when reversing trailers or navigating narrow alleys which lead to reduced stress when driving each day. The Timing Cover fits over the timing chain or timing belt and creates a hardened aluminum, plastic or steel shield preventing the road grit, dust and splashing water to chew up those synchronized gears. The molded gasket slides into the engine face, closing the leakage and ensuring that the oil remains in its place to ensure that the chain remains oiled. Change the Timing Cover when the cracks are found or the fasteners are corroded; it is too late to replace it and pieces of debris will tear the timing set and leave the car stapled. Wipe off the outside of the cover during oil changes and change the gasket when oil leaks occur and stop the premature deterioration of the belt or chain.

GMC Timing Cover Parts and Q&A

Timing Cover
93445880
Q: How to replace the engine front timing cover on GMC Sierra 1500?
A:
To replace engine front cover, ensure that the Water Pump, crankshaft balancer, and Oil Pan are removed and then removed the engine shield bolts and shield. Remove the clip of the engine wire harness from the front cover and remove the crankshaft position (CKP) electric connector . Take off the bolt attached to the ckp sensor and the sensor itself, dispose of the ckp sensor o-ring seal. Unplug the engine wiring harness electrical connector from the camshaft position (CMP) sensor wiring harness jumper, then, take off the cmp sensor bolt and take out the cmp sensor and the wiring harness jumper from the engine front cover. Unplug the cmp sensor's wiring harness jumper from the cmp sensor, take cmp sensor off the wiring harness jumper. Next, take off front cover bolts and dispose of the front cover while removing front cover carefully to clean all sealing surfaces before installing a new covering. Replace the front cover bolts, fastening it to 12 n.m (106 lb in), do not reuse the original o-ring seal. If the old cmp sensor is to be reinstalled; install a new o-ring seal onto the sensor and install the cmp sensor on the wire harness jumper and connect the cmp sensor wire harness jumper to the cmp sensor. Apply clean engine oil to the o-ring seal and then mount the cmp sensor and wiring harness jumper to the engine front cover, tight in place the cmp sensor bolt by 10 n.m (89 lb in). Join the engine wiring harness transformer from the cmp sensor wiring harness jumper. Make sure not to use the original ckp sensor angle wire seal again. Fresh engine oil to lubricate a new ckp sensor o-ring seal and fit it to the ckp sensor with the bolt to 8 n.m (71 lb in) tight. Ensure that the sensor is fully seated before tightening the bolt to 8 n.m (71 lb in). Connect the ckp sensor electrical connector and the engine wire harness clip to the front cover. Lastly, the engine shield and bolts should be installed and tightened to 20 n. M (15 lb ft), then the Oil Pan, crankshaft balancer and Water Pump.
Timing Cover, Front
12594939
Q: How to replace the engine front timing cover on GMC Yukon?
A:
If you are to change the engine front cover, remove the Water Pump and crankshaft balancer first. Unplug the cmp sensor wire harness from cmp actuator magnet and the engine harness from cmp sensorarness. The next step is to remove Oil Pan to front cover bolts and front cover bolts (501), after which the front cover (502) should be removed along with its gasket (503) which should be discarded. Strip the crankshaft front oil seal off it and in case of changing the engine front cover take off the cmp sensor wire harness and bolts and disconnecting it from the cmp sensor off and besides taking off the cmp sensor wire harness and the cmp sensor (703) and cmp actuator magnet bolts (751) and magnet (752) but discarding cmp actuator magnet gasket (753). For installation, do not use the reused crankshaft oil seal or the front cover gasket and do not apply the sealant to the front cover gasket in the absence of instructions. Use the en-48853 front cover alignment tool which will adjust the crankshaft front oil seal properly. Install a new cmp actuator magnet gasket (753), put the cmp actuator magnet (752) and bolts (751) on and tighten them to 12 nm (106 lb in) check the cmp sensor o-ring seal (704) for damage, lubricate its o-ring with clean engine oil and install the cmp sensor (703). Mount the cmp sensor wire harness to the front cover, attach it to the compressor pressure sensor, tighten the cmp sensor wire harness bolts to 12 nm (106 lb in), and apply gasket between the wire harness and the front cover. Put a 5 mm, 20 mm 0.20in,0.80in length bead of sealant on the Oil Pan, the Oil Pan to engine block junction ,and then to position the new engine front cover gasket (503) and front cover (502) on the engine. Putting in front cover bolts (501) until snug in sequence avoiding overtightening, oil pan to front cover bolts in finger-tight sequence. Install the crank shaft balancer bolt partially tight then tighten the Oil Pan to front cover at 25 nm (18 lb ft) then tighten the engine front cover bolts at 25 nm (18 lb ft). Unplug the tools, place the cmp sensor, and connect the engine harness electrical connector to the cmp sensor wire harness electrical connector and the Camshaft Position Sensor wire harness electrical connector to the cmp actuator magnet. Finally, seal a new crankshaft front oil seal and also the Water Pump.