Best Alt Tensioner in 2026

1. Assembly Belt Tensioner

2. Meets or Exceeds OE Quality

3. Material of Pulley: Premium Thermoplastic

Premium OE Quality Engine Timing Idler Pulley

Priority Fast Shipping

2 Years / 50,000 Mile Warranty

Premium OE Quality Engine Timing Idler Pulley

Priority Fast Shipping

2 Years / 50,000 Miles Warranty

Combining the innovation of a GEARWRENCH ratcheting wrench with the requirements of the serpentine belt removal tool to provide the best possible combination

Complete tool set for removing or installing the serpentine belt on vehicles with a spring loaded belt tensioner pulley

Long bar can hold sockets directly or attach to the ratcheting wrench for maximum access

Designed to keep drive belt at proper tension

Some ACDelco Gold parts may have formerly appeared as ACDelco Professional

Premium aftermarket replacement part

Allows for the operation of various pulleys, and drive belt accessories, with the use of a single belt

Creates a secure point of contact with the pulley, which allows for traction

Some ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional

2003-11 Ford Crown Victoria

2003-04 Ford Mustang

2003-11 Lincoln Town Car

Designed to keep drive belt at proper tension

Some ACDelco Gold parts may have formerly appeared as ACDelco Professional

Premium aftermarket replacement part

Many products require vehicle-specific fitment

View the Compatibility table to ensure the part fits your year, make, model and submodel

Please reference the submodel information located on the far left within the Compatibility table under "Notes"

Helps keep abrasive particles away from bearings and other engine hydraulic components

Some ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional

ACDelco GM Original Equipment parts are designed, engineered and tested to rigorous standards, and are backed by General Motors

hydraulic tensioners utilizes a unique hydraulic pressurizing mechanism that efficiently dampens timing belt vibration

maintaining optimal belt tension throughout the revolutions per minute range

hydraulic tensioner in select applications

6 ribs x 1140 mm or 6 ribs x 44.9 inch

strong tensile cords carry high horsepower loads without stretching

award winning oem supplier with over 100 major quality awards from manufacturers such as gm, toyota, honda, vw, nissan and many others

Comprehensive line includes parts to fit cars, vans, SUVs and light trucks, domestic and import (European and Asian)

Manufactured using the same or improved technology and quality materials as the Original Equipment Manufacturer (OEM) part, assuring a factory match

Patented labyrinth seal protects internal components to meet or exceed OE life expectancy requirements

Drives several engine functions

Some ACDelco Gold parts may have formerly appeared as ACDelco Professional

Premium aftermarket replacement part

Steel and thermoplastic construction designed to tight manufacturing tolerances for high durability and quality performance

Built to last with a superior resistance to dirt, salt, chemicals and other under-hood contaminants

OE-quality fit for virtually every domestic or import vehicle on the road today

Ideal replacement - this drive belt tensioner is a direct replacement for the original tensioner on specified vehicle years, makes and models

Durable construction - this tensioner assembly is made using quality components to ensure durability and performance

Cost-effective solution - offers original equipment fit and function at a competitive price

Helps keep drive belt at correct tension to help maintain proper function

Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)

GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors.

Restores accessory drive belt system, eliminate noisy tensioner pulley

GM-recommended replacement part for your GM vehicle’s original factory component

Offering the quality, reliability, and durability of GM OE

Comprehensive line includes parts to fit cars, vans, SUVs and light trucks, domestic and import (European and Asian)

Manufactured using the same or improved technology and quality materials as the Original Equipment Manufacturer (OEM) part, assuring a factory match

Patented labyrinth seal protects internal components to meet or exceed OE life expectancy requirements

Package length:35.56 cm

Package width:13.97 cm

Package height:2.54 cm

Size: 82.5" long by .82" wide with six ribs

Grooved design runs cooler for a longer life of your belt

Less noise when running

Some ACDelco Gold parts may have formerly appeared as ACDelco Professional

Premium aftermarket replacement part

Manufactured to meet specifications for fit, form, and function for General Motors vehicles as well as most makes and models

Lifetime lubricated ball bearings

Flat pulley that contains specially formulated glass-filled polymers to insure a high strength, cooler running, wear resistant "plastic" pulley

Meets or exceeds OE quality

Item Package Dimension:10.7 cm L X11.6 cm W X21.7 cm H

Item Package Weight:1.31 Kilograms

Product Type:Auto Part

For RAINIER 2004-2007; For Cadillac Escalade 2002-2008; For Chevrolet Avalanche 2007-2008; For Chevrolet Avalanche 1500 2002-2006; For Chevrolet Express 1500,Express 2500,Express 3500 2003-2008

For Chevrolet Silverado 1500,Silverado 2500 1999-2008; For Chevrolet Silverado 1500/2500/3500 CLASSIC 2007; For Chevrolet Silverado 3500 2001-2008; For Chevrolet SSR2003-2006; For Chevrolet Suburban 1500/2500 2000-2008; For Chevrolet TAHOE 2000-2008

For Chevrolet TRAILBLAZER2003-2009; For GMC ENVOY 2003-2009; For GMC Savana 1500, Savana 2500, Savana 3500 2003-2008; For GMC Sierra 1500, 2500 1999-2008

Keep your belt from throwing during deceleration with this manual belt tensioner

Easily adjust the tensioner with a 1/2" drive ratchet

Compatible with 1998-2002 Camaro LS1 (or GTO any year) crank pulley

Ideal replacement - this drive belt tensioner is a direct replacement for the original tensioner on specified vehicle years, makes and models

Durable construction - this tensioner assembly is made using quality components to ensure durability and performance

Cost-effective solution - offers original equipment fit and function at a competitive price

Package Dimensions: 24.892 cms (L) x 11.176 cms (W) x 7.366 cms (H)

Product Type: Auto Part

Package Quantity: 1

Package Dimensions: 5.63 L x 11.25 H x 4.13 W (inches)

Package Weight: 1.6 pounds

Country of Origin : China

Package length:35.56 cm

Package width:8.382 cm

Package height:3.048 cm