How to replace spark plugs on GMC C2500?

Start by taking off the Spark Plug Wires and very slightly loosen each Spark Plug with 1 or 2 rotations. Cleansing the Spark Plug areas with a brush or air blower enables safe removal of each Spark Plug for placement into labeled cylinder-trays. Set each Spark Plug washer correctly and check or adjust its gap to achieve the correct measurement of 1.524 mm (0.060 in). The technician should begin hand-tightening spark plugs to specific torques of 15 n.m (11 lb ft) when using used heads and 30 n.m (22 lb ft) using new iron heads while new aluminum heads require a torque setting at 20 n.m (15 lb ft). Finish the process by reinstalling Spark Plug Wires.

OEM GMC C2500 Spark Plug

Ignition Spark Plug

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GMC C2500 Glow Plug
Part Number: 12563554
$18.86 MSRP: $33.68
You Save: $14.82 (44%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Glow Plug, Spark Ignition; Diesel Glow Plug
- Replaces: 25168651
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1988-2000 GMC C2500 | Sierra, Sierra SL, Sierra SLE, Sierra SLT, Sierra SLX | 6 Cyl 4.3 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L CNG, 8 Cyl 5.7 L GAS, 8 Cyl 6.2 L DIESEL, 8 Cyl 6.5 L DIESEL, 8 Cyl 7.4 L GAS

GMC C2500 Spark Plug

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GMC C2500 Spark Plug Parts Questions & Experts Answers

Glow Plug
12563554
Q: How to replace spark plugs on GMC C2500?
A: Start by taking off the Spark Plug Wires and very slightly loosen each Spark Plug with 1 or 2 rotations. Cleansing the Spark Plug areas with a brush or air blower enables safe removal of each Spark Plug for placement into labeled cylinder-trays. Set each Spark Plug washer correctly and check or adjust its gap to achieve the correct measurement of 1.524 mm (0.060 in). The technician should begin hand-tightening spark plugs to specific torques of 15 n.m (11 lb ft) when using used heads and 30 n.m (22 lb ft) using new iron heads while new aluminum heads require a torque setting at 20 n.m (15 lb ft). Finish the process by reinstalling Spark Plug Wires.