This page lists 26 belt drive parts for the 2021 Cadillac XT6, across 4 part types, covering both the 2.0L L4 Turbocharged and the 3.6L V6. Every part shows its brand, manufacturer part number and fitment notes.
On the 2021 Cadillac XT6, the belt drive system spins the accessories — serpentine and V-belts, tensioners, idlers and pulleys. Most of the listed parts are Belt (16 parts), Belt Tensioner (8 parts) and Belt Tensioner Bolt (1 part). The other 1 part type covers the remaining 1 part.
The 2021 Cadillac XT6 was sold with both the 2.0L L4 Turbocharged and the 3.6L V6. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
10 brands supply belt drive parts for the 2021 Cadillac XT6, led by CONTINENTAL (5 parts), DAYCO (4 parts) and GATES (4 parts), plus 7 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 XT6. 5 parts have it, including DAYCO 5050420DR (Belt) and GM GENUINE 12647765 (Belt Tensioner). Each part number opens a page with every vehicle that part fits.
Belt
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DAYCO Popular Fits: 2.0L L4 Turbocharged | 5050420DR | 🇺🇸 US 🇨🇦 CA | Drive Rite®Serpentine | View on Amazon |
| CONTINENTAL Fits: 2.0L L4 Turbocharged | 420K5MK | 🇺🇸 US 🇨🇦 CA | Mileage MakerSerpentine | View on Amazon |
| CONTINENTAL Fits: 3.6L V6 | 725K6MK | 🇺🇸 US 🇨🇦 CA | Mileage MakerMulti V-Belt | View on Amazon |
| DAYCO Fits: 3.6L V6 | 5060725DR | 🇺🇸 US 🇨🇦 CA | Drive Rite®Serpentine | View on Amazon |
| FVP Fits: 2.0L L4 Turbocharged | 420K5 | 🇺🇸 US 🇨🇦 CA | Multi V-BeltSerpentine | View on Amazon |
| FVP Fits: 3.6L V6 | 725K6 | 🇺🇸 US 🇨🇦 CA | Multi V-BeltSerpentine | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular Fits: 3.6L V6 | 12649097 | 🇺🇸 US 🇨🇦 CA | GM Original EquipmentSerpentine | View on Amazon |
| BANDO Popular Fits: 3.6L V6 | 6PK1840 | 🇺🇸 US 🇨🇦 CA | Rib Quantity: 6 | View on Amazon |
| DAYCO Popular Fits: 2.0L L4 Turbocharged | 5050420 | 🇺🇸 US 🇨🇦 CA | Serpentine | View on Amazon |
| ACDELCO Fits: 2.0L L4 Turbocharged | 12732747 | 🇺🇸 US 🇨🇦 CA | GM Original EquipmentSerpentine | View on Amazon |
| ACDELCO Fits: 3.6L V6 | 6K724 | 🇺🇸 US 🇨🇦 CA | Professional / GoldSerpentine | View on Amazon |
| CONTINENTAL Fits: 2.0L L4 Turbocharged | 4050420 | 🇺🇸 US 🇨🇦 CA | Multi V-BeltSerpentine | View on Amazon |
| CONTINENTAL Fits: 3.6L V6 | 4060725 | 🇺🇸 US 🇨🇦 CA | Multi V-BeltSerpentine | View on Amazon |
| DAYCO Fits: 3.6L V6 | 5060725 | 🇺🇸 US 🇨🇦 CA | Serpentine | View on Amazon |
| GATES Fits: 2.0L L4 Turbocharged | K050419 | 🇺🇸 US 🇨🇦 CA | Micro-V | View on Amazon |
| GATES Fits: 3.6L V6 | K060724 | 🇺🇸 US 🇨🇦 CA | 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.
16 Belt parts for the 2021 Cadillac XT6 come from 6 brands — DAYCO, CONTINENTAL, ACDELCO and 3 other brands. The "Popular" part is DAYCO 5050420DR.
The Economy section lists 6 options from DAYCO, CONTINENTAL and FVP — the catalog's value-priced group. DAYCO 5050420DR is listed in this group.
In the Standard Replacement grade, ACDELCO, DAYCO, CONTINENTAL and 2 other brands supply 10 parts: built to original-equipment specification. A representative part number is ACDELCO 12649097.
Belt Tensioner
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CLOYES Fits: 3.6L V6 | B20557 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| VAICO Fits: 2.0L L4 Turbocharged | V570132 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Popular Fits: 3.6L V6 | 12647765 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| CONTINENTAL Fits: 3.6L V6 | 50515 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| GATES Fits: 2.0L L4 Turbocharged | 39693 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| GATES Fits: 3.6L V6 | 39516 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| GM GENUINE Fits: 2.0L L4 Turbocharged | 55516895 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| LITENS Fits: 3.6L V6 | 999667A | 🇺🇸 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.
8 Belt Tensioner parts are listed for the 2021 Cadillac XT6, from GM GENUINE, GATES, CLOYES and 3 other brands. GM GENUINE 12647765 carries the "Popular" badge.
Economy: 2 parts, from CLOYES and VAICO. A representative part number is CLOYES B20557.
The Standard Replacement section: 6 options from GM GENUINE, GATES, CONTINENTAL and 1 other brand. GM GENUINE 12647765 is listed in this group.
Listed part numbers: GM GENUINE 12647765, CLOYES B20557 and VAICO V570132, plus the other parts above.
Belt Tensioner Bolt
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Fits: 2.0L L4 Turbocharged | 11588749 | 🇺🇸 US 🇨🇦 CA | M10X1.5X85 | View on Amazon |
This table covers the Belt Tensioner bolts.
This group shows a single part: GM GENUINE 11588749.
Idler Pulley
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Fits: 3.6L V6 | 1540569 | 🇺🇸 US 🇨🇦 CA | Smooth | View on Amazon |
This table covers the idler pulleys the belt wraps around. Typical signs include a chirp that follows engine speed, or a pulley that feels rough or has play. Replace a noisy idler with the belt — the labor is already paid for.
This group shows a single part: GM GENUINE 1540569.
Buying Belt Drive Parts for a 2021 Cadillac XT6
On this vehicle, the belt drive system spins the accessories — serpentine and V-belts, tensioners, idlers and pulleys.
- Match the engine first. Every belt drive part here is engine-specific; each row shows which engine(s) it fits.
- 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 XT6?
Our catalog currently lists 26 belt drive parts for the 2021 Cadillac XT6 across 4 subcategories and 10 brands, covering both the 2.0L L4 Turbocharged and the 3.6L V6. Each part is matched to the engine(s) it fits.
Do belt drive parts differ between 2021 Cadillac XT6 engines?
Yes. Every belt drive part on this page is engine-specific. Each row shows which engine(s) it fits — use the filter at the top to hide the rest. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of belt drive problems on a 2021 Cadillac XT6?
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 XT6 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 XT6?
First match the engine — each row shows which engine(s) the part fits. 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 XT6
Belt Drive Parts for Other Cadillac XT6 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.