Four Seasons 45971 drive belt idler pulley for the 1999-2013 Chevrolet Silverado 1500 4.8L / 5.3L and other vehicles guides the belt on the engine's accessory drive. It is also sold as an idler / tensioner pulley.
- Engineered and tested for years of trouble-free operation, backed by over 50 years of mobile A/C experience at Four Seasons
- Plastic construction for longer life and dampening
- Constructed for OE quality and reliability
- Designed to prevent belt slip, which helps eliminate noise
A squeal or chirp from the belt area, a belt that slips, or a pulley with visible wobble can mean the idler pulley is worn. Before you replace it, rule out a worn belt, a weak tensioner or a noisy accessory bearing, since any of those can make a similar noise.
Other vehicles it fits include the 2011-2012 Ram 1500 3.7L / 4.7L and the 1999-2013 GMC Sierra 1500 4.8L / 5.3L / 6.0L / 6.2L, with a quantity of one per vehicle. It fits many more, so open the "Vehicles it fits" section to check your exact model and engine.
Specifications
Fit and size
- Drive application: serpentine, air conditioning, accessory drive, main drive
- Quantity per vehicle: 1
- Outside diameter: 76.0 mm (2.99 in)
- Width: 28.7 mm
- Belt width: .88 in
- Grooves: 6
- Mount holes: 1
Build and materials
- Type: idler pulley
- Material: plastic
- Belt type: serpentine
In the box
Mounting hardware is not included. Plan on new bolts, since the old ones may not be reusable.
Frequently Asked Questions
Does the Four Seasons 45971 idler pulley fit a 2011-2012 Ram 1500 3.7L or 4.7L?
Yes, the Four Seasons 45971 drive belt idler pulley fits the 2011-2012 Ram 1500 3.7L / 4.7L. For other models and engines, check the "Vehicles it fits" section.
Does this belt idler pulley come with a mounting bolt?
No. Mounting hardware is not included with this pulley, so plan on buying new bolts for the installation.
What size is the Four Seasons 45971 idler pulley?
The Four Seasons 45971 pulley has a 76.0 mm (2.99 in) outside diameter and is 28.7 mm wide. It has 6 grooves for a serpentine belt that is .88 in wide.
Is this drive belt idler pulley plastic or metal?
It is made of plastic, which is meant to give longer life and dampening. The Four Seasons 45971 has one mount hole.
How can I tell if a belt idler pulley is going bad?
A chirping or grinding noise from the belt area, or a pulley that wobbles, can mean the idler pulley is worn. A shop can confirm which belt-drive part is at fault.
