GMT800 Serpentine Belt Routing Label – Reproduction

Description

Restore the Original GMT800 Serpentine-Belt Routing Information

Refresh your GMT800 engine compartment with a clean, easy-to-read reproduction Accessory Belt Routing label. This factory-style underhood decal recreates the bilingual white-on-black routing artwork used on matching GM full-size trucks and SUVs.

The artwork corresponds to original GM reference number 12573025. GM later superseded that number with service reference 12575049. GM service catalogs also associate 12575049 with the earlier reference 15750971.

The reproduction arrives on an oversized vinyl sheet with a white trim keyline. The installer cuts around the keyline before applying the finished label at the original fan-shroud, upper-radiator-support, or radiator-air-deflector location.

What the Label Shows

• Bilingual “Accessory Belt Routing” heading in English and French
• First V8 gasoline-engine belt-routing configuration
• Second V8 gasoline-engine routing configuration with A/C callout
• Diesel-engine routing configuration
• Dual-generator diesel arrangement
• High-contrast white pulley and belt artwork on a black background
• Original GM artwork reference number 12573025

The diagrams are intended as a convenient underhood reference. Always compare the label with the vehicle’s installed engine, accessories, pulleys, A/C equipment, and generator configuration before relying on the routing information.

Original and Service Reference Numbers

A later service replacement number does not automatically prove that every production revision used identical artwork. Match the complete diagram rather than relying only on a supersession number.

Primary GMT800 Application Reference

Fitment is controlled by the engine and accessory configuration—not by vehicle model and year alone.

Applications Requiring Extra Verification

Do not assume this label fits the following solely because a broad service catalog lists the vehicle family:

• 4.3L V6 Silverado or Sierra applications
• Vehicles with an altered accessory drive
• Engine-swapped trucks or SUVs
• Vehicles converted between mechanical and electric cooling-fan arrangements
• Single-generator diesel vehicles when the original diagram differs
• Vehicles whose A/C compressor, generator, idler, or tensioner locations differ
• 2007 Classic trucks unless the original reference number and complete artwork match
• Export or market-specific vehicles with different bilingual or accessory layouts

This exact reproduction depicts V8 and diesel routes. A customer with a different pulley arrangement should use the GMT Central custom label request page rather than assuming the diagrams are interchangeable.

Product Details

• Quantity: one aftermarket reproduction label
• Original artwork reference: 12573025
• Later GM service replacement: 12575049
• Label type: accessory belt / serpentine belt routing
• Languages: English and French
• Color: black background with white printing
• Approximate finished size: 5.91 × 1.97 inches
• Metric finished size: 150 × 50 mm
• Premium water-resistant vinyl
• Matte UV-protective laminate
• Protection against normal exposure to water, sunlight, scratches, and handling
• Waterproof permanent adhesive
• Easy-peel backing
• Printed on an oversized sheet
• White trim keyline included
• Supplied trim-to-fit

This listing includes the reproduction label only. It does not include a serpentine belt, A/C belt, tensioner, idler pulley, generator, alternator, compressor, installation tools, or additional underhood labels.

Trim-to-Fit Construction

The label is intentionally printed on an oversized sheet. The white keyline defines the intended finished edge and allows the installer to make a clean final cut before installation.

Complete all trimming while the adhesive backing remains attached. Use sharp scissors or a precision craft knife, a metal straightedge, and a protected cutting surface.

Installation

1. Compare the reproduction with the original label number and all three routing diagrams.
2. Confirm the vehicle’s installed engine, A/C equipment, and generator configuration.
3. Identify the original mounting location on the fan shroud, radiator support, or upper radiator air deflector.
4. Test-fit the reproduction before removing the backing.
5. Trim carefully along the white keyline while the backing remains attached.
6. Remove the original label and as much remaining adhesive as practical.
7. Clean the mounting surface with a residue-free cleaner appropriate for plastic or painted metal.
8. Allow the surface to dry completely and cool before application.
9. Peel back a small section of the liner and align one edge.
10. Apply gradually from one side to the other while pressing outward to reduce trapped air.
11. Press firmly across the complete label, especially around the edges.
12. Allow approximately 24 hours for the adhesive to set before washing or exposing the area to cleaners or solvents.

Do not install over grease, dirt, loose paint, heavy texture, or a hot engine component. Gentle warming can help adhesion in cool conditions, but excessive heat can distort the vinyl.

Care

Clean the installed label with a soft cloth and a mild cleaner suitable for vinyl. Wipe gently from the center toward the edges. Avoid abrasive pads, aggressive solvents, and direct high-pressure spray at the trimmed edges.

Shipping

Free shipping is included to all 50 U.S. states.

Most products ship within approximately 2–5 business days. Typical delivery is approximately 6–13 days from order placement, depending on production time, carrier, and destination. Tracking information is provided when available.

Related GMT800 Underhood Labels

• GMT800 A/C Refrigerant Label – 1999–2002 Early Spec
• GMT800 A/C Refrigerant Label – 2003–2004
• GMT800 A/C Refrigerant Label – 2005–2006
• Request a Different or Custom GM Label

Frequently Asked Questions

What GM part number does this reproduction match?

The face of this reproduction identifies original GM reference 12573025. GM later replaced that service number with 12575049.

Why does the old product description mention 12575049?

GM 12575049 is the later service replacement for 12573025. Both numbers are relevant, but 12573025 is the original reference printed on this exact artwork.

Does it fit every 1999–2006 GMT800?

No. The vehicle must have a belt and accessory configuration matching one of the diagrams. Model and year alone are not sufficient.

Does this fit a 4.3L V6 Silverado or Sierra?

This exact artwork does not show a 4.3L V6 diagram. A V6 vehicle should use the correct engine-specific routing label or a custom reproduction based on its original artwork.

Does it include a route for air conditioning?

Yes. One of the V8 layouts includes the A/C compressor routing callout. Compare the complete pulley arrangement with the vehicle.

Does it include a diesel routing diagram?

Yes. The label includes a diesel-engine layout with a dual-generator configuration. It should not be assumed correct for every diesel accessory arrangement.

Does it fit the Hummer H2?

The later GM service-label family is cataloged for selected Hummer H2 applications. Order only when the original number or complete artwork matches this reproduction.

Is the label pre-cut?

No. It is supplied oversized with a white trim keyline and must be trimmed before installation.

Where is the label installed?

It is typically installed on the fan shroud, upper radiator support, or upper radiator air deflector. Use the original adhesive outline or vehicle-specific reference photography to confirm placement.

Is this a genuine General Motors label?

No. This is a newly manufactured aftermarket reproduction made for GMT Central. It is not a genuine GM, New Old Stock, or licensed General Motors part.

Can I rely on the label instead of a service manual?

No. The label is a convenient restoration and service reference. Always verify the belt path through the vehicle’s installed equipment and appropriate service information before operating the engine.

Service and Reproduction Notice

An incorrectly routed belt can cause loss of charging, cooling, power steering, A/C operation, or other accessory functions. Confirm the route before starting the engine.

GMT Central is not affiliated with or endorsed by General Motors. General Motors, GM, Chevrolet, GMC, Cadillac, Hummer, Silverado, Sierra, Tahoe, Suburban, Yukon, Yukon XL, Avalanche, Escalade, and related names and reference numbers are used only to identify the intended applications of this aftermarket reproduction.