X AUTOHAUX Idler Pulley 36299 for Chevrolet & GMC — Direct-Fit M10 Bolt, Steel-Rubber Black

An X AUTOHAUX idler pulley 36299 is a direct-fit replacement pulley assembly (with M10 bolt, dust shield and retainer spacer) for select Chevrolet Express, Silverado and GMC Savana/Sierra models.

This heavy-duty idler pulley restores proper belt routing and tension for serpentine accessory systems on a range of General Motors vans and trucks. Built from steel and rubber with a bearing sized for vehicle-specific loads, the part matches OE dimensions (approx. 6 x 9 cm; M10 x 1.5 thread) so it installs quickly as a direct replacement. Included is the pulley with bolt and spacer to simplify the swap and reduce downtime.

Which vehicles will this X AUTOHAUX idler pulley fit?

The pulley is designed to fit many Chevrolet Express and GMC Savana/Sierra model years where part number 36299 is specified. Confirm fit by comparing part number and thread size before purchase; compatibility covers several model-year ranges for both passenger and light-duty variants.

• Chevrolet Express 3500: 2003–2004, 2006–2007, 2009–2010, 2012–2016
• GMC Savana 1500: 2006–2007, 2009–2010, 2012–2014
• GMC Savana 2500: 2003–2007, 2009–2010, 2012–2016
• GMC Sierra 1500 Classic: 2007; replace where 36299 is required

How does this pulley perform compared with the original equipment?

Constructed from steel and rubber with a bearing chosen for application-specific load and speed, the X AUTOHAUX unit aims to match OE durability and fit. It is intended as a locked center tensioning or idler pulley and is sized to replicate original function without modifications.

• Steel/rubber construction for corrosion resistance and longevity
• Bearing rated for the intended speed/load of the application
• Approximate dimensions: 6 x 9 cm (2.36" x 3.54")
• Thread: M10 x 1.5 for bolt fitment included

What is included and how easy is installation?

The package contains one idler pulley with the matching bolt and spacers/dust shield to facilitate a straightforward replacement. Because the unit is built to OE-like specifications, it installs as a direct replacement using common hand tools; no machining or special adapters are required.

• 1 x idler pulley (black finish)
• 1 x M10 x 1.5 bolt plus insert/dust shield and retainer spacer
• Direct-fit design: remove old pulley, transfer any brackets if needed, fasten and torque to spec
• Recommended: inspect belt and other pulleys during installation

When should I replace an idler pulley and what maintenance helps longevity?

Replace the idler pulley if you notice belt noise, visible wear, wobble, or rough bearing movement. Regular inspections during routine service help catch early wear and prevent accessory drive failure.

• Signs to replace: squeal, grinding, belt misalignment, visible rubber wear
• Inspect pulleys and belt every oil-change interval for best results
• Replace worn belts and any noisy pulleys together to avoid repeat labor

Who is this for: This X AUTOHAUX idler pulley is aimed at DIY mechanics, independent repair shops and fleet technicians working on Chevrolet Express, GMC Savana and compatible GMC Sierra vehicles that require part number 36299. It suits anyone seeking an economical OE-form replacement pulley with the bolt and spacer included to simplify installation and get the accessory drive system back into reliable service.