Autolite XP105 spark plug for the 1999 Chevrolet Silverado 1500 V8 4.8L or 5.3L and other vehicles ignites the air-fuel mixture in each cylinder.
- Iridium XP line plug with an iridium center electrode tip on a fine-wire design for a more focused ignition
- Platinum ground electrode tip for resistance to wear and a longer plug life
- Taper cut ground electrode tip that improves ignitability
- High alumina multi-rib ceramic insulator for thermal conductivity and protection against flash-over
- Nickel-plated shell that resists corrosion
Quick facts
- Part: Autolite XP105 spark plug
- Fits: the 1999 Chevrolet Silverado 1500 V8 4.8L or 5.3L and other vehicles
- Condition: New
A worn plug can show up as hard starting, a rough idle, a misfire or poorer fuel economy. A misfire or hard start by itself does not prove the plug is the problem, since a weak ignition coil can also be behind it.
Fits
Popular fits include the 1999 Chevrolet Silverado 1500 V8 4.8L or 5.3L, which takes eight plugs, and the 1991-1996 Ford Explorer V6 4.0L, which takes six. It is also a Ford Mustang spark plug for the 1979 V6 2.8L, the 1979-1982 4-cylinder 2.3L and the 1980 V8 5.0L, which take six, four and eight. If your car is not among these, open the "Vehicles it fits" section and look up your exact model and engine.
Specifications
Fit and size
- Quantity per vehicle: varies by engine
- Thread: M14 - 1.25, metric, 14 mm diameter
- Hex size: 5/8 in
- Seat type: Tapered
- Heat range: 8
- Center electrode projection: Mid projection
Build and materials
- Center electrode: fine wire, iridium tip, copper core
- Ground electrode: one, taper cut, platinum tip, nickel core
- Insulator: ceramic
- Resistor plug: 4000 ohm
- Terminal: non-removable nut
- Condition: New
- Warranty: Autolite lifetime limited warranty
- Country of origin: Mexico
In the box
One spark plug. A washer is not included.
Interchange: 41-963 · IZTR5B-11
2408 · 1465
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
41-963, 2408, 1465, IZTR5B-11, IZTR5B11
Frequently Asked Questions
Is the XP105 the right spark plug for a 1991-1996 Ford Explorer V6 4.0L?
Yes. Autolite XP105 fits the 1991-1996 Ford Explorer V6 4.0L, which takes six plugs. For other models, open the "Vehicles it fits" section.
Is this spark plug right for the 1999 Chevrolet Silverado 1500 V8 4.8L or 5.3L?
Yes. Autolite XP105 fits both of those engines, and the truck takes eight plugs.
Are these Autolite platinum spark plugs?
The XP105 has an iridium center electrode tip and a platinum ground electrode tip, so it combines both metals. It belongs to the Iridium XP line.
What thread size and heat range does this spark plug have?
The thread is M14 - 1.25 metric, with a 5/8 in hex and a tapered seat. The heat range is 8.
Does the Autolite XP105 come with a washer?
No. Washers are not included; the listing is one spark plug.
