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Description
GM Throttle Body 12678312 OEM 4.8L 5.3L 6.0L 6.2L W/ Mounting HardwareCondition: NEW NEW TAKE OFF The GM Genuine Parts throttle body part number 12678312 is engineered to precise GM standards for optimal engine air control. Designed for fuel injection systems this throttle body plays a vital role in regulating air intake ensuring excellent performance and efficiency across numerous GM vehicle applications such as Sierra Suburban Silverado Tahoe and Yukon. Its precision and reliability are confirmed by multiple sources
Condition: NEW / NEW TAKE OFFThe GM Genuine Parts throttle body part number 12678312 is engineered to precise GM standards for optimal engine air control. Designed for fuel injection systems this throttle body plays a vital role in regulating air intake ensuring excellent performance and efficiency across numerous GM vehicle applications such as Sierra Suburban Silverado Tahoe and Yukon. Its precision and reliability are confirmed by multiple sources making it an essential component for maintaining smooth engine function.
Fitment information provided with best effort, customer is ultimately responsible for fitment
Hollander Number 337-10048
| Application | Year(s) | Engine / Notes |
|---|---|---|
| ESCALADE | 18-19 | (throttle valve assembly) |
| ESCALADE | 21 | 6.2L ID 12678312 |
| ESCALADE ESV | 18-19 | (throttle valve assembly) |
| ESCALADE ESV | 21 | (throttle valve assembly) 6.2L ID 12678312 |
| SIERRA 1500 PICKUP | 19 | style (mirrors mount on door skin) 6.2L ID 12678312 |
| SIERRA 1500 PICKUP | 20-21 | 6.2L ID 12678312 |
| SIERRA 2500 PICKUP | 20 | diesel |
| SIERRA 2500 PICKUP | 21 | (throttle valve assembly) diesel |
| SIERRA 3500 PICKUP | 20-21 | (throttle valve assembly) diesel |
| SIERRA DENALI 1500 | 19-21 | (throttle valve assembly) 6.2L ID 12678312 |
| SIERRA DENALI 2500 | 20 | diesel |
| SIERRA DENALI 2500 | 21 | (throttle valve assembly) diesel |
| SIERRA DENALI 3500 | 20-21 | (throttle valve assembly) diesel |
| SILVERADO 1500 PICKUP | 19 | style (mirrors mount on door skin) 6.2L ID 12678312 |
| SILVERADO 1500 PICKUP | 20-21 | 6.2L ID 12678312 |
| SILVERADO 2500 PICKUP | 20 | (throttle valve assembly 6.6L) diesel |
| SILVERADO 3500 PICKUP | 20 | (throttle valve assembly 6.6L) diesel |
| SUBURBAN 1500 | 21 | 6.2L ID 12678312 |
| TAHOE | 21-22 | 6.2L ID 12678312 |
| YUKON | 21 | 6.2L ID 12678312 |
| YUKON XL 1500 | 21 | 6.2L ID 12678312 |
Part Number: 12678312
Manufacturer: GM
Weight: 3.0000 lbs
Additional Details:
Genuine OEM Parts
Please research/ensure fitment of part to your specific vehicle before purchasing. Returns because of non-fitment are accepted with a re-stocking fee, however customer is responsible for return shipping.
Shipping:
If shipping outside the contiguous 48 states is required, reach out to [email protected] to confirm shipping details.
About Us:
Custard Core Supply provides the highest quality of new, new take off, used, and core parts. We provide a variety of gas and diesel parts to our customers. Based in Dallas, TX Custard Core Supply has been in business since 1998. If you do not see a product you are looking for on our page, please reach out!
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 12 reviews
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Product Reviews
★★★★★ 5
Tinta de sublimation
Encantada. El color queda impreso hermoso
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 20, 2025
★★★★★ 4
Missing a black in the box but my favorite ink!
One of my boxes was missing a black but otherwise my favorite ink of all time!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 11, 2025
★★★★★ 5
Tinta para sublimar
Excelente me salió
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 2, 2025
★★★★★ 5
Great color saturation
I have only used this a couple of times and was concerned about the dull colors when it printed out. But the listing warns you about that so I went ahead and pressed it. Perfect! Bold colors and high quality images. Plus, filling my printer only took a little over half the bottles. Great value for the money and I will definitely be ordering again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 28, 2020
★★★★★ 5
Superior Customer Service; 100% prefect and functional, BUT...
Number of Items: 2
This product fits perfectly, after all it's just a simple piece replacement. The big deal is the counter reset, and this is where Customer Service outstands.
People complaints about the difficulty of following the reset instructions, and with reason, as they are lengthy. But that is the printer you have, that is Epson's product. You either send the printer to them and pay the premium fee, or do it yourself, but you have to play their game. This is not Seller's fault; on the contrary, Seller put all their effort to include each and every steps you need to fix the problem, no matter what printer model you have.
They included most, If not all, printer models you may have. They provided super detailed instructions to ensure your success; keys where needed, no keys where not needed, printer drivers location to download and ensure the resetter will work and, best of all, support if you need it.
You have to contact them through Amazon asking for the user's manual (instructions; yes, the lengthy ones), the reset program and the reset keys if applicable (this depends on you printer model; some need the reset keys, some do not). And this is where you get concerned: When are they going to answer, now that my printer is locked? You think (I did): it is weekend, they will probably answer Monday or maybe Tuesday (after all, that already have the money, why care?).
Well, I was absolutely wrong, they answered during the weekend with all necessary to have the printer back, up and running; Thank You.
Some tips:
1. There is nothing wrong with the software (if got from a reputable source, and they for sure are), so get it without concerns.
2. Get the printer driver as advised; it is quite probable that the software will not work if you don't install the correct driver; don't forget to restart the computer after the driver installation.
3. Make sure your printer is set up with the USB connection Enabled (mine was disabled and that caused a headache: ET-4800).
4. When the resetter instructions call for Initialize the Counters, don't do it, not yet; select Check instead, just above Initialize. If you cannot read (Check) the counters, you will not be able to Initialize them: fix the connection problem first (make sure you installed the printer driver and RESTART the computer, make sure you enabled the USB connection in the printer, and make sure the usb cable is correctly connected).
It's not Seller's fault to make long and complicated instructions, that is actually their effort to make sure you have all you need to succeed.
Buy with confidence, this works: if you cannot make it work, you may find someone you trust to help you out (your kids or grandkids know a lot for sure), or just let Seller know, they are willing to help you out.
Best regards.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 10, 2025
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