Maintenance / 2001 Silverado 1500 4WD · Automatic 4-speed · 8 cyl · 4.8 L

Spark plugs

Use the engine-specific plug type. Check the service schedule and inspect ignition faults before replacing parts.

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IntervalReplace spark plugs and inspect spark-plug wires at 100,000 mi (166,000 km).Verified

01 / Requirements

Configuration-specific service and fitment facts

These sourced values are shared by the specification sheet and the maintenance guides for this exact configuration.

Cylinders: 8 Verified
Spark plug specification: DENSO PTJ14R15 or NGK PZTR5A15 Verified
Spark plug gap: 0.06 in Verified

Installation: Work on a cooled engine using the specified tightening procedure. Do not adjust a fine-wire plug gap unless its manufacturer explicitly permits it.

Source

FuelEconomy.gov model-year bulk vehicle records

Source ↗

Official bulk configuration, engine, transmission, drivetrain, fuel-economy, volume, and emissions records; the official record API is the bounded fallback.

United States, complete imported model years 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026Cylinders: FuelEconomy.gov vehicle record 16999, cylinders

2001 Chevrolet Silverado Owner’s Manual — C2115 A

Source ↗

Primary GM owner manual. Service specifications and schedules use printed chapter/page locators; the separate restoration kit remains the source for its own technical specifications.

United States, 2001 Chevrolet Silverado gasoline engines; engine, transmission and equipment restrictions retainedOwner's manual, plugs and wires at 100,000 miles, page 7-16Spark plug specification: Owner's manual, replacement parts, page 6-83Spark plug gap: Owner's manual, engine specifications, page 6-80