NPAUTO Idle Air Control Valve & Throttle Position Sensor Kit for Chevy GMC 1999-2002 — Direct Fit, Restores Stable Idle

NPAUTO’s replacement Idle Air Control (IAC) valve and Throttle Position Sensor (TPS) restore stable idle and accurate throttle feedback for compatible 1999–2002 Chevy and GMC engines.

When a vehicle exhibits rough or fluctuating idle, hard starts, or erratic throttle response, worn IAC or TPS components are often the cause. This matched IAC valve and TPS assembly is engineered to match factory fit and function for many 4.8L, 5.3L, 5.7L, and 6.0L Chevy and GMC models from 1999–2002, giving an affordable way to bring drivability back without expensive dealer parts.

Which vehicles will this IAC valve and TPS fit?

This kit fits a wide selection of GM trucks, SUVs and performance cars equipped with the listed engine sizes from model years 1999 through 2002. Confirm compatibility by cross-referencing the part numbers or your vehicle’s year, make, engine and existing sensor part numbers.

• Chevy: Silverado 1500/2500/3500, Camaro (2000–2002), Tahoe, Suburban, Avalanche 1500 (2002)
• GMC: Sierra 1500/2500/3500, Yukon and Yukon XL, Escalade and Escalade EXT, selected Pontiac Firebird and 2004 Pontiac GTO
• Interchangeable OEM numbers: 217-1806, 2171806, 17076327, 17113598, 89053319, 213-2718, 88864359, 89054614 and more

How does the replacement improve drivability?

Replacing a faulty IAC and TPS removes the root causes of unstable idle and inconsistent throttle signals. The IAC accurately meters bypass air for steady idle RPMs, while the TPS provides the engine control unit with precise throttle position data for smoother acceleration and better fuel control.

• Reduces idle surging and stalling
• Improves throttle response and shift quality
• Helps eliminate hard starting or high idle conditions

What are the build characteristics and reliability features?

This assembly is made from materials rated for higher temperatures and engineered to resist the heat and vibration found in the engine bay. Critical internal components and electrical connectors are specified to meet automotive durability expectations for long-term service.

• High-temperature-resistant materials for longevity
• Durable electrical terminals to maintain signal integrity
• OEM-style mounting and sealing to prevent air leaks

Is installation difficult and what support is included?

Installation is straightforward for anyone comfortable with basic automotive maintenance. The part is made to fit directly in place of the original components; typical installation requires common hand tools and minimal tuning, though a scan-tool check is recommended after replacement.

• Direct-fit design—no major modifications required
• Simple bolt-on swap and connector plug-in
• Backed by a 1-year warranty and customer support

Who is this for: This NPAUTO IAC valve and TPS kit suits DIY mechanics, independent shops, and fleet technicians working on late‑90s to early‑2000s Chevy and GMC vehicles with 4.8L–6.0L engines. It’s intended for owners seeking a cost-effective, quality replacement to correct idle instability, throttle inconsistencies, or to bring an engine back into reliable operation without expensive OEM pricing.