Removing (4.8L, 5.3L & 6.0L)
WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
The Melco® spark plug wires MUST be used only with the Melco® coils and bracket, like wise the Delphi® spark plug wires MUST be used only with Delphi® coils and bracket. The components are NOT interchangeable.
- Remove the spark plug wire from the spark plug. Twist the spark plug wire boot a 1/2 turn. Pull only on the boot in order to remove the wire from the spark plug.
- Remove the spark plug wire from the ignition coil. Twist the spark plug wire boot a 1/2 turn. Pull only on the boot in order to remove the wire from the ignition coil.
- There are 2 different manufacturers for the spark plug wire, ignition coils and coil brackets. The Melco® spark plug wire will have a blue foil mark on it, and the wire is 145 mm (5.70 in) in length from cable seal to cable seal. The Delphi® spark plug wire will have a white foil mark on it, and the wire is 110 mm (4.30 in) in length cable seal to cable seal. See Fig 1.
- The Melco® ignition coil is a square design. The Delphi® ignition coil is a round design. See Fig 2. The Melco® ignition coil bracket is a square design. The Delphi® ignition coil bracket is a round design. See Fig 3.