loosoo A/C Serpentine Drive Belt Tensioner Kit for GM Trucks & SUVs — 90K-38159/ACK040378HD, OEM Fit & Noise Reduction

The loosoo A/C serpentine drive belt tensioner kit is a direct-fit replacement tensioner assembly designed to restore proper belt tension and reduce noise on compatible GM trucks and SUVs from 1999–2008.

This kit replaces worn or failing A/C drive belt tensioners on a range of Cadillac and General Motors models, providing an OEM-level fit and a quieter accessory drive. Engineered to meet factory fitment dimensions and supplied with the core components installers expect, the loosoo tensioner kit (90K-38159 / ACK040378HD / 19311139) is intended for owners who need a reliable, straightforward repair without sourcing multiple aftermarket parts separately.

Which vehicles will this tensioner kit fit?

The loosoo kit covers many full-size GM trucks and SUVs across model years roughly spanning 1999–2008. Always check your vehicle’s year, make, model and engine configuration against the provided part numbers before ordering to ensure compatibility.

• Common compatible models: Cadillac Escalade (2002–2008), Chevrolet Avalanche (2002–2008), Express (2003–2008)
• Also fits: Silverado, Suburban, Tahoe, Sierra, Yukon, H2 and Savana in listed years
• Replacement references: 90K-38159, ACK040378HD, 19311139

How does this kit improve belt performance and noise?

Worn tensioners allow the serpentine belt to slip or misalign, which causes squeal, chatter or inconsistent accessory operation. Replacing the tensioner restores correct belt pre-load and pulley alignment, improving accessory drive stability and reducing audible belt noise.

• Restores correct belt tension for steady A/C and accessory operation
• Reduces belt slip and high-pitched squealing during start-up
• Precision mating surfaces help keep the belt tracking properly

What’s included and what tools are needed for installation?

The kit supplies the tensioner assembly and related hardware so you won’t need to source additional components for a standard replacement. Typical installation is straightforward for someone with basic hand tools and a moderate DIY skill level.

• Kit includes the replacement tensioner assembly and mounting hardware
• Common tools: 5mm socket and 15mm end wrench (and a torque wrench for final tightening)
• Estimated install time: about 1 hour for an experienced DIYer

Will this part match OEM quality and longevity?

The loosoo tensioner is built to meet OEM fit and form standards for the referenced part numbers, aiming to provide a durable replacement that performs like the factory unit. Proper installation and routine belt inspection will help ensure long service life.

• Manufactured to OEM fitment dimensions for correct alignment
• Designed to reduce noise and maintain accessory drive performance
• Recommended to inspect belt condition and routing during replacement

Who is this for: This tensioner kit is suited to owners and technicians working on late‑1990s through 2008 GM full‑size trucks and SUVs who need a reliable, drop‑in replacement for a failing A/C serpentine drive belt tensioner. It’s ideal for DIY mechanics looking to eliminate belt noise and restore accessory operation, as well as professional shops seeking a cost-effective, OEM‑compatible part for routine repairs. Before purchase, verify your vehicle’s part number and year to confirm fitment.