How do I know a part fits my truck?

Every listing shows the truck make, model years, side (left/right) and OEM cross-reference numbers. Match any of your OEM numbers to the listing, or send us your number and we will confirm fitment.

Do you ship the same day?

Orders placed before 12PM Central on business days ship the same day from our US warehouse. Transit is typically 2–5 business days depending on your state.

What is your return policy?

30-day returns on unused parts in original packaging. Wrong part shipped by us? We cover the return label and ship the correct one first.

Do you offer fleet or shop pricing?

Yes. Business accounts get tiered pricing, saved reorders and a dedicated line. Open a business account to see your pricing and order online.

Are these OEM or aftermarket parts?

We sell quality aftermarket parts cross-referenced to OEM numbers, plus select OEM-grade lines. Brand and grade are shown on every listing.

Can I order by part number?

Yes — type any part number or OEM cross reference into the search bar. If it is not listed, send it to us and we will source it.

Dayco HD 2-Piece Tensioner, DD13/DD15/DD16 (89947)

Dayco heavy-duty automatic belt tensioner. Ships from our Illinois warehouse.

Dayco HD 2-Piece Tensioner
Cuts installation time by 50% when compared to competitive products
For DD13 DD15 and DD16 Engines
For Serpentine Belts
Protects against high shock loads and reducing the risk of belt noise or slippage

Brand
- Dayco
Quality Tier
- OEM
OEM Reference
- Dayco 89947
Condition
- New
Warranty
- 1-Year FleetPro Warranty

Wholesale pricing for approved accounts

Open a FleetPro business account to see fleet pricing and order online. Repair shops, trucking companies & dealers welcome.

Request a business account

Terms and Conditions
30-day returns on unused parts
Same-day shipping on orders before 12PM CT

Internal Reference: DAY89947

Same-day shipping before 12PM CT from our Illinois warehouse
Part requests and quotes answered within one business hour
30-day returns
1-Year FleetPro Warranty
Wholesale and fleet pricing for approved business accounts
We speak English, Russian, Ukrainian, Romanian, Bulgarian, French and Polish

Belt Tensioner, Specifications & Fitment

Dayco heavy-duty automatic belt tensioner.

Specifications

Dayco HD 2-Piece Tensioner
Cuts installation time by 50% when compared to competitive products
For DD13 DD15 and DD16 Engines
For Serpentine Belts
Protects against high shock loads and reducing the risk of belt noise or slippage
Brand: Dayco
Grade: OE

Where it's used

Maintains serpentine belt tension on heavy-duty diesel engines.

Product Details

Brand	Dayco
Quality Tier	OEM
OEM Reference	Dayco 89947
Condition	New
Warranty	1-Year FleetPro Warranty