How to replace the accessory drive belt on 2003 Chevrolet Express 3500?

Begin the accessory Drive Belt replacement by taking away the air cleaner assembly followed by the retaining bolt on the coolant recovery reservoir then place the reservoir aside. A breaker bar connected to a hex-head socket should be used to turn the Drive Belt tensioner counterclockwise for belt tension reduction. Uninstall the belt from its positions on the pulleys and the Drive Belt tensioner before you release tension from the Drive Belt tensioner at a steady pace. You need to clean all pulleys after you remove their breaker bar along with the socket from the tensioner bolt. When installing a new belt users must first guide it through all pulleys without the idler but after that they must position the breaker bar fitted with hex-head socket on the belt tensioner bolt and push it clockwise until sufficient tension is reached. Insert the Drive Belt under the idler pulley before slowly eliminating tension from the belt tensioner using the breaker bar and socket on the tensioner bolt. Check that the Drive Belt is correctly positioned and align it properly, then position the coolant recovery reservoir and tighten the retaining bolt to 11 nm (97 inch lbs.). Finish the procedure by reinstalling the air cleaner assembly.

OEM 2003 Chevrolet Express 3500 Drive Belt

Serpentine Belt

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2003 Chevrolet Express 3500 Serpentine Belt Part Number: 12637202
$51.90 MSRP: $92.70
You Save: $40.80 (45%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Belt-Fan & Water Pump & Generator & Power Steering Pump; Serpentine Drive Kit; Accessory Drive Belt; V-Belt; Belt; Belt, Drive
- Replaces: 12576450, 12554029, 10105314, 12550608, 12569347, 24505041
- Item Weight: 0.80 Pounds
- Item Dimensions: 12.5 x 4.1 x 1.0 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12637202
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2003 Chevrolet Express 3500 Submodels:
- Base, LS, LT | 8 Cyl 4.8 L FLEX, 8 Cyl 4.8 L GAS, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS
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2003 Chevrolet Express 3500 Serpentine Belt Part Number: 12637204
$50.29 MSRP: $89.82
You Save: $39.53 (45%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Belt-Fan & Water Pump & Generator & Power Steering Pump; Serpentine Drive Kit; Accessory Drive Belt; V-Belt; Belt; Belt, Drive
- Replaces: 12557501, 12569348, 12576451
- Item Weight: 0.90 Pounds
- Item Dimensions: 15.8 x 11.4 x 2.0 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12637204
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2003 Chevrolet Express 3500 Submodels:
- Base, LS, LT | 8 Cyl 4.8 L FLEX, 8 Cyl 4.8 L GAS, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS
View related parts
2003 Chevrolet Express 3500 Serpentine Belt Part Number: 12576447
$22.27 MSRP: $39.76
You Save: $17.49 (44%)
ADD TO CART
Product Specifications
- Other Name: Belt, A/C Compressor; Serpentine Belt Drive Kit; Accessory Drive Belt; Drive Belt; V-Belt; A/C Belt; Belt, Drive
- Replaces: 12569346, 12554028
- Item Weight: 0.50 Pounds
- Item Dimensions: 8.8 x 3.6 x 0.9 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12576447
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2003 Chevrolet Express 3500 Submodels:
- Base, LS, LT | 8 Cyl 4.8 L FLEX, 8 Cyl 4.8 L GAS, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS

2003 Chevrolet Express 3500 Drive Belt

With a comprehensive array of OEM 2003 Chevrolet Express 3500 Drive Belt, from fuel pumps to door handles, our website is a one-stop-shop for your needs. All our genuine 2003 Chevrolet Express 3500 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.

2003 Chevrolet Express 3500 Drive Belt Parts and Q&A

Q: How to replace the accessory drive belt on 2003 Chevrolet Express 3500?
A: Begin the accessory Drive Belt replacement by taking away the air cleaner assembly followed by the retaining bolt on the coolant recovery reservoir then place the reservoir aside. A breaker bar connected to a hex-head socket should be used to turn the Drive Belt tensioner counterclockwise for belt tension reduction. Uninstall the belt from its positions on the pulleys and the Drive Belt tensioner before you release tension from the Drive Belt tensioner at a steady pace. You need to clean all pulleys after you remove their breaker bar along with the socket from the tensioner bolt. When installing a new belt users must first guide it through all pulleys without the idler but after that they must position the breaker bar fitted with hex-head socket on the belt tensioner bolt and push it clockwise until sufficient tension is reached. Insert the Drive Belt under the idler pulley before slowly eliminating tension from the belt tensioner using the breaker bar and socket on the tensioner bolt. Check that the Drive Belt is correctly positioned and align it properly, then position the coolant recovery reservoir and tighten the retaining bolt to 11 nm (97 inch lbs.). Finish the procedure by reinstalling the air cleaner assembly.