How to replace a spark plug on GMC Sierra 3500?

The starting point of replacing a Spark Plug includes disconnecting the Spark Plug wire followed by rotating the Spark Plug one or two turns counterclockwise. Before removing the Spark Plug take time to brush away or blow out excess dirt from its base. Place all spark plugs to be changed in separate trays where each one bears the identifier of its assigned cylinder. Placement of the Spark Plug washer should be correct during installation and measurements for the Spark Plug gap should be made to adjust it to 1.524 mm (0.060 in). Slight hand motion should start the Spark Plug in each cylinder before proper torque reaches 20 n.m (15 lb ft) for used heads or 30 n.m (22 lb ft) for new heads. Reinstall the Spark Plug wire as the last step.

OEM GMC Sierra 3500 Spark Plug

Ignition Spark Plug

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GMC Sierra 3500 Glow Plug Part Number: 12639701
$25.20 MSRP: $45.00
You Save: $19.80 (44%)
ADD TO CART
Product Specifications
- Other Name: Glow Plug, Glow; Diesel Glow Plug; Glow Plug, Spark Ignition
- Replaces: 97364968
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006 GMC Sierra 3500 | SL, SLE, SLT, WT | 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL, 8 Cyl 8.1 L GAS
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GMC Sierra 3500 Glow Plug Part Number: 97326305
$24.56 MSRP: $43.86
You Save: $19.30 (44%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Glow Plug, Spark Ignition; Diesel Glow Plug
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2005 GMC Sierra 3500 | Base, SLE, SLT, WT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL, 8 Cyl 8.1 L GAS
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GMC Sierra 3500 Glow Plug Part Number: 97226202
$19.63 MSRP: $35.06
You Save: $15.43 (45%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Glow Plug, Spark Ignition
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2001-2003 GMC Sierra 3500 | Base, SL, SLE, SLT | 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL, 8 Cyl 8.1 L GAS

GMC Sierra 3500 Spark Plug

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GMC Sierra 3500 Spark Plug Parts and Q&A

Glow Plug
12639701
Q: How to replace a spark plug on GMC Sierra 3500?
A:
The starting point of replacing a Spark Plug includes disconnecting the Spark Plug wire followed by rotating the Spark Plug one or two turns counterclockwise. Before removing the Spark Plug take time to brush away or blow out excess dirt from its base. Place all spark plugs to be changed in separate trays where each one bears the identifier of its assigned cylinder. Placement of the Spark Plug washer should be correct during installation and measurements for the Spark Plug gap should be made to adjust it to 1.524 mm (0.060 in). Slight hand motion should start the Spark Plug in each cylinder before proper torque reaches 20 n.m (15 lb ft) for used heads or 30 n.m (22 lb ft) for new heads. Reinstall the Spark Plug wire as the last step.