AC DELCO 76199SCYM Speedometer Transmitter

( Brand: Ac Delco ), ( Manufacturer Part Number: 76199SCYM ), ( Part Type: Speedometer ), ( Notes: Vehicle Speed Sensor New; If Needing Mating Connector Use 8. ), ( Years: 2002 2001 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 ), ( Application: Gmc Sierra 2500 Hd Speedometer Transmitter ), ( Product Name 2: Vehicle Speed Sensor ), ( Cs-sku: 400 )

Review AC DELCO Gmc Hd Speedometer Transmitter fits SIERRA 2500 2001–2014

The **AC Delco 76199SCYM** is a high-performance, direct-fit speedometer transmitter designed specifically for the **2001 2014 GMC Sierra 2500 HD** (including the 2002 model year), ensuring precise and reliable speed readings for your vehicle s instrument cluster. Engineered to meet or exceed OEM standards, this replacement unit is built with durable materials and advanced electronics to deliver accurate, lag-free feedback to your dashboard, eliminating common issues like erratic readings, slow response, or complete failure of the speedometer. The transmitter features a robust, sealed construction to protect against dust, moisture, and vibration, which are common challenges in heavy-duty truck applications. Compatible with both **mechanical and electronic speedometer systems**, this part integrates seamlessly with the GMC Sierra s wiring harness, ensuring a clean, plug-and-play installation that minimizes the risk of compatibility issues. Whether your original unit has failed due to wear, corrosion, or electrical faults, the **AC Delco 76199SCYM** provides a dependable solution that restores confidence in your vehicle s instrumentation. Built to last, this aftermarket replacement is backed by the trusted name of **AC Delco**, a brand synonymous with quality and performance in automotive components, making it an ideal choice for truck owners seeking reliability without compromising on precision.

### **Pros and Cons of buying a AC Delco 76199SCYM Speedometer Transmitter (2001 2014 GMC Sierra 2500 HD, 2002 Model Year)**

1. **OEM Compatibility** This part is an original equipment (OEM) replacement from AC Delco, a trusted brand under General Motors. It is designed to fit directly into your vehicle s speedometer system without requiring extensive modifications.

2. **Reliability** AC Delco is known for producing durable automotive parts, especially for older GM trucks. The speedometer transmitter is a critical component, and a high-quality replacement reduces the risk of failure over time.

3. **Easy Installation** The 76199SCYM is a straightforward plug-and-play replacement. Most users report that swapping it out takes less than an hour, especially if they have basic mechanical experience. No wiring harnesses or complex adjustments are typically required.

4. **Cost-Effective** While not the cheapest option, it is often more affordable than a full speedometer assembly replacement. Purchasing just the transmitter avoids unnecessary expenses for unrelated components.

5. **Warranty Coverage** AC Delco parts usually come with a manufacturer s warranty (typically 1 2 years), providing peace of mind in case of premature failure.

6. **Prevents Further Damage** A failing speedometer transmitter can cause erratic speedometer readings or complete failure, potentially leading to confusion while driving. Replacing it early prevents potential safety concerns or additional diagnostic issues.

7. **Aftermarket Support** Since this is a common GM part, it is widely available from online retailers, auto parts stores, and even eBay, making it easy to source if needed.

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1. **Age of the Vehicle** Your 2002 GMC Sierra 2500 HD is already over two decades old. Older vehicles may have other worn-out components (e.g., wiring, speedometer cable, or dashboard electronics) that could cause issues even after replacing the transmitter. This replacement alone may not fully resolve speedometer problems.

2. **Potential for Counterfeit Parts** Buying from untrusted sellers (especially online) increases the risk of receiving a fake or low-quality AC Delco part. Always verify the seller s reputation and check for authenticity seals or packaging.

3. **Speedometer Cable Wear** If the speedometer cable (the flexible rod connecting the transmission to the transmitter) is damaged or stretched, replacing just the transmitter may not fix the issue. You may need to replace the cable as well, adding to the cost.

4. **Electrical Issues** If the vehicle has existing electrical problems (e.g., corroded connectors, faulty ground, or a failing instrument cluster), the new transmitter may not function correctly. A thorough diagnostic check is recommended before purchase.

5. **Limited Longevity** While AC Delco parts are durable, they are not immune to wear. In high-mileage vehicles, the transmitter may fail again after several years, requiring another replacement.

6. **Mismatched Part Variants** Ensure the part number (76199SCYM) matches your exact vehicle year, model, and transmission type (automatic/manual). Some GMC Sierra models (especially with different trim levels or aftermarket modifications) may require a slightly different part.

7. **Labor Costs (If Not DIY)** If you re not comfortable with basic automotive repairs, labor costs at a shop can add $50 $150 to the total expense, negating some of the savings from buying the part yourself.

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The **AC Delco 76199SCYM speedometer transmitter** is a solid OEM replacement for your 2002 GMC Sierra 2500 HD, offering reliability and ease of installation. It is a practical choice if your speedometer is malfunctioning due to a failed transmitter, provided the issue isn t related to the speedometer cable, wiring, or instrument cluster.

However, **purchasing this part blindly without verifying the root cause of the problem** could lead to wasted money if other components are at fault. Before buying, confirm:

- Whether the speedometer cable is intact.

- If there are any visible electrical issues (corrosion, loose connections).

- Whether the instrument cluster itself is functioning (some clusters fail independently).

If the transmitter is indeed the culprit, this part is a **recommended choice** due to its compatibility, durability, and ease of installation. For best results, source it from a reputable seller (e.g., RockAuto, AutoZone, or a trusted online retailer) and consider replacing the speedometer cable if it shows signs of wear.

- **Buy the AC Delco 76199SCYM** if you ve confirmed the speedometer transmitter is faulty and are comfortable with a straightforward replacement.

- **Inspect the speedometer cable and wiring** before proceeding to avoid unnecessary replacements.

- **Consider professional diagnosis** if the speedometer issue persists after the transmitter swap, as deeper electrical or cluster problems may exist.

- **Avoid counterfeit parts** by purchasing from verified sellers with return policies.

Details:

Fitment Notes: USE TOGETHER WITH CONNECTOR 15306187 With LEADS; 2 SPEED MANUAL SHIFT TRANSFER CASE NP2, Vehicle: Sub model: Transmission: 2005 GMC Sierra 2500 HD4WD1000 Automatic 5 Sped, HD4WDS6-650 Manual 6 Sped. Fitment Notes: USE TOGETHER WITH CONNECTOR 15306187 With LEADS; SCREW IN O-RING; 2-SPEED, PUSH BUTTON CONTROL, ACTIVE TRANSFER CASE NP8, Vehicle: Sub model: Transmission: 2001 - 2002, 2005 GMC Sierra 2500 HD4WD4L80-E Automatic 4 Sped. Fitment Notes: USE TOGETHER WITH CONNECTOR 15306187 With LEADS; 2-SPEED, PUSH BUTTON CONTROL, ACTIVE TRANSFER CASE NP8, Vehicle: Sub model: Transmission: 2003 - 2004 GMC Sierra 2500 HD4WD4L80-E Automatic 4 Sped. Offering the quality, reliability, and durability of GM OE.

Parts Geek - For 2001 2014 GMC Sierra 2500 HD Speedometer Transmitter AC Delco 76199SCYM 2002: Review Fitment Notes to Ensure Proper Fit condition: New Brand: Notes: Vehicle Speed Sensor New; IF NEEDING MATING CONNECTOR USE 88987993 THREADED Meets or Exceeds OEM Specifications: Yes Features: GM-recommended replacement part for your GM vehicles original factory component. Manufactured to GM OE specification for fit, form, and function.

part #: 76199scym price

• $64.13

specifications boosttempgauges:

• for models: 2500, Sierra
• for makes: Gmc
• for years: 2001-2014
• brand: Ac Delco
• mpn: 76199scym
• part type: Speedometer
• notes: Vehicle Speed Sensor New; If Needing Mating Connector Use 8.
• years: 2002 2001 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013
• application: Gmc Sierra 2500 Hd Speedometer Transmitter
• product name 2: Vehicle Speed Sensor
• cs-sku: 400

payments boosttempgauges:

• other
• wallet: Paypal
• credit card: Diners-club

returns boosttempgauges:

• paid by: Seller
• time: 30 Days
• policy: Returns Accepted

seller boosttempgauges:

• # reviews: 328735
• rating: 98.8%
• city: Portland, Tennessee

general boosttempgauges:

• condition: New
• Interior Parts Accessories > Gauges > Individual Gauges

shipping boosttempgauges:

• service: FedEx Ground / FedEx Home Delivery
• class: Standard
• transit: 4-7 Days
• carrier: FedEx
• type: Fixed
• cost: $0.00

offer boosttempgauges:

• started: April 17, 2026
• sold: 0
• availability: In Stock
• quantity: 1
• options: Ship-to-home

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