How to replace the drive belt for the water pump and generator on 2009 Cadillac STS?

The Water Pump and generator belt replacement procedure starts by removing the front compartment sight shield if needed. The Drive Belt tensioner should receive a clockwise rotation for belt tension release to remove the Drive Belt from the Water Pump Pulley. You can take off the Drive Belt from accessory drive pulleys after needing to slowly release the Drive Belt tensioner. After positioning the Drive Belt onto the Crankshaft Pulley and tensioner and generator follow by rotating the Drive Belt tensioner clockwise before you install the Drive Belt onto the Water Pump while ensuring correct alignment into the accessory drive pulley grooves. Reinstall the front compartment sight shield after you slowly release the Drive Belt tensioner.

OEM 2009 Cadillac STS Drive Belt

Serpentine Belt

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6 Drive Belts found

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2009 Cadillac STS Serpentine Belt
Part Number: 12621991
$48.34 MSRP: $105.53
You Save: $57.19 (55%)
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Product Specifications
- Other Name: Belt, Drive; Serpentine Belt Drive Kit; Accessory Drive Belt; Drive Belt; V-Belt; Alternator Belt
- Replaces: 12578002
- Item Weight: 0.50 Pounds
- Item Dimensions: 22.3 x 4.0 x 1.0 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12621991
- Warranty: This genuine part is guaranteed by GM's factory warranty.
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Fits the following 2009 Cadillac STS Submodels:
- Base, Platinum | 6 Cyl 3.6 L GAS
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2009 Cadillac STS Serpentine Belt
Part Number: 12578062
$32.98 MSRP: $58.90
You Save: $25.92 (45%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Belt, Generator; Serpentine Belt Drive Kit; Accessory Drive Belt; Drive Belt; V-Belt; Alternator Belt; Belt, Drive
- Item Weight: 0.70 Pounds
- Item Dimensions: 17.3 x 3.7 x 0.9 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12578062
- Warranty: This genuine part is guaranteed by GM's factory warranty.
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Fits the following 2009 Cadillac STS Submodels:
- Base, Platinum | 8 Cyl 4.6 L GAS
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2009 Cadillac STS Serpentine Belt
Part Number: 12578000
$24.60 MSRP: $38.39
You Save: $13.79 (36%)
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Product Specifications
- Other Name: Belt, Drive; Serpentine Belt Drive Kit; Accessory Drive Belt; Drive Belt; V-Belt; A/C Belt
- Item Weight: 1.30 Pounds
- Item Dimensions: 21.2 x 3.5 x 1.1 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12578000
- Warranty: This genuine part is guaranteed by GM's factory warranty.
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Fits the following 2009 Cadillac STS Submodels:
- Base, Platinum | 6 Cyl 3.6 L GAS
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2009 Cadillac STS Serpentine Belt
Part Number: 12593189
Product Specifications
- Other Name: Belt, Water Pump, A/C Compressor & Power Steering Pump; Serpentine Drive Kit; Accessory Drive Belt.; A/C Belt; Belt, Drive
- Replaces: 12578063
- Item Weight: 0.70 Pounds
- Item Dimensions: 14.4 x 4.7 x 0.7 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12593189
- Warranty: This genuine part is guaranteed by GM's factory warranty.
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Fits the following 2009 Cadillac STS Submodels:
- Base, Platinum, V | 8 Cyl 4.4 L GAS, 8 Cyl 4.6 L GAS
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2009 Cadillac STS Drive Belt
Part Number: 12582643
Product Specifications
- Other Name: Belt, Drive; Serpentine Belt Drive Kit; Accessory Drive Belt; Serpentine Belt; V-Belt; Supercharger Belt
- Item Weight: 0.60 Pounds
- Item Dimensions: 25.5 x 5.7 x 1.0 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12582643
- Warranty: This genuine part is guaranteed by GM's factory warranty.
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Fits the following 2009 Cadillac STS Submodels:
- Base, Platinum, V | 6 Cyl 3.6 L GAS, 8 Cyl 4.4 L GAS, 8 Cyl 4.6 L GAS
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2009 Cadillac STS Alternator Belt
Part Number: 12587076
Product Specifications
- Other Name: Belt, Drive; Serpentine Belt Drive Kit; Accessory Drive Belt; Serpentine Belt; Drive Belt; V-Belt
- Item Weight: 0.50 Pounds
- Item Dimensions: 4.6 x 17.3 x 1.0 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12587076
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2009 Cadillac STS Submodels:
- V | 8 Cyl 4.4 L GAS

2009 Cadillac STS Drive Belt

With a comprehensive array of OEM 2009 Cadillac STS Drive Belt, from fuel pumps to door handles, our website is a one-stop-shop for your needs. All our genuine 2009 Cadillac STS Drive Belt are backed by the manufacturer's warranty and are offered at competitive prices in the market. Rest assured, you can shop with complete confidence.

2009 Cadillac STS Drive Belt Parts Questions & Experts Answers

Q: How to replace the drive belt for the water pump and generator on 2009 Cadillac STS?
A: The Water Pump and generator belt replacement procedure starts by removing the front compartment sight shield if needed. The Drive Belt tensioner should receive a clockwise rotation for belt tension release to remove the Drive Belt from the Water Pump Pulley. You can take off the Drive Belt from accessory drive pulleys after needing to slowly release the Drive Belt tensioner. After positioning the Drive Belt onto the Crankshaft Pulley and tensioner and generator follow by rotating the Drive Belt tensioner clockwise before you install the Drive Belt onto the Water Pump while ensuring correct alignment into the accessory drive pulley grooves. Reinstall the front compartment sight shield after you slowly release the Drive Belt tensioner.