The 2021 Cadillac XT4 has 11 belt drive parts with verified fitment on this page — 3 part types and 7 brands, covering the 2.0L L4 Turbocharged engine. Each part includes a manufacturer part number and application notes.
The belt drive system on the 2021 Cadillac XT4 spins the accessories — serpentine and V-belts, tensioners, idlers and pulleys. All 11 listed parts are Belt (7 parts), Belt Tensioner (3 parts) and Belt Tensioner Bolt (1 part).
The 2021 Cadillac XT4 came with a single engine, the 2.0L L4 Turbocharged, and every part is verified against it.
7 brands supply belt drive parts for the 2021 Cadillac XT4, led by DAYCO (2 parts), CONTINENTAL (2 parts) and GATES (2 parts), plus 4 more brands. Quality grades include Standard Replacement and Economy.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2021 Cadillac XT4. 2 parts have it, including DAYCO 5050420DR (Belt) and DAYCO 5050420 (Belt). Each part number opens a page with every vehicle that part fits.
Belt
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DAYCO Popular | 5050420DR | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Drive Rite®Serpentine | View on Amazon |
| CONTINENTAL | 420K5MK | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Mileage MakerSerpentine | View on Amazon |
| FVP | 420K5 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Multi V-BeltSerpentine | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DAYCO Popular | 5050420 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Serpentine | View on Amazon |
| ACDELCO | 12732747 | 🇺🇸 US 🇨🇦 CA | GM Original EquipmentSerpentine | View on Amazon |
| CONTINENTAL | 4050420 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Multi V-BeltSerpentine | View on Amazon |
| GATES | K050419 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Micro-V | View on Amazon |
This table covers the serpentine and accessory belts that drive the front accessories. Typical signs include squeal on cold start, cracks across the ribs, or glazing on the back of the belt. A new belt on a worn tensioner will squeal within weeks — spin the idlers by hand while the belt is off.
7 Belt parts for the 2021 Cadillac XT4 come from 5 brands — DAYCO, CONTINENTAL, FVP and 2 other brands. The "Popular" part is DAYCO 5050420DR.
The Economy section lists 3 options from DAYCO, CONTINENTAL and FVP — the catalog's value-priced group. DAYCO 5050420DR is listed in this group.
In the Standard Replacement grade, DAYCO, ACDELCO, CONTINENTAL and 1 other brand supply 4 parts: built to original-equipment specification. A representative part number is DAYCO 5050420.
Part numbers include DAYCO 5050420DR, CONTINENTAL 420K5MK and FVP 420K5, among others listed above.
Belt Tensioner
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VAICO | V570132 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES | 39693 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| GM GENUINE | 55516895 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the automatic tensioners that hold belt tension. Typical signs include belt flutter, a chirp that returns after a new belt, or a damper that no longer holds the arm. Replace the tensioner with the belt at higher mileage; the labor overlaps almost entirely.
3 Belt Tensioner parts are listed for the 2021 Cadillac XT4, from VAICO, GATES and GM GENUINE.
Economy: 1 part, from VAICO. A representative part number is VAICO V570132.
The Standard Replacement section: 2 options from GATES and GM GENUINE. GATES 39693 is listed in this group.
Listed part numbers: VAICO V570132, GATES 39693 and GM GENUINE 55516895.
Belt Tensioner Bolt
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | 11588749 | 🇺🇸 US 🇨🇦 CA | M10X1.5X85 | View on Amazon |
This table covers the Belt Tensioner bolts.
This group shows a single part: GM GENUINE 11588749.
Buying Belt Drive Parts for a 2021 Cadillac XT4
On this vehicle, the belt drive system spins the accessories — serpentine and V-belts, tensioners, idlers and pulleys.
- Confirm you have the 2.0L L4 Turbocharged engine — every part on this page is matched to it.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace the tensioner and idler pulleys with any belt at higher mileage — the labor overlaps almost entirely.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Belt and Belt Tensioner .
Frequently Asked Questions
How many belt drive parts fit the 2021 Cadillac XT4?
Our catalog currently lists 11 belt drive parts for the 2021 Cadillac XT4 across 3 subcategories and 7 brands, covering the 2.0L L4 Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of belt drive problems on a 2021 Cadillac XT4?
Common symptoms include squealing on cold start, a belt that shows cracking or glazing, or an accessory that slows under load. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, replace the tensioner and idler pulleys with any belt at higher mileage — the labor overlaps almost entirely.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2021 Cadillac XT4 was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2021 Cadillac XT4?
Every part on this page is matched to the 2.0L L4 Turbocharged engine. Then a new belt on a worn tensioner will squeal within weeks — check tensioner damping and idler bearings while the belt is off. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2021 Cadillac XT4
Belt Drive Parts for Other Cadillac XT4 Years
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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.