Best source for GM 12580681?

[HappySalesman]

Hunting down a bad miss on cylinder 8 in my LH6. Have done new plugs/wires, swapped coils around and the issue stays. About to do leakdown/compression test, but want to order injectors to get them on their way in case its that. Anyone have a good source? I see ACDelco's listed on ebay but don't want to risk getting a knockoff that makes my issue worse.

[gtstorey]

Looks like GM under the new part 19421333 seems to be the best place. Or swap to something like LS3 injectors with adapter. Stay away from ebay or amazon for injectors.

[HappySalesman]

Is there any detriment to upgrading to a larger injector on a stock motor?

[gtstorey]

Is there any detriment to upgrading to a larger injector on a stock motor?

Not within reason and not with ones that have good GM data. But the tune will have to have the injector data updated and might benefit from having the tune cleaned up a little. So, if in a vehicle that is not already licensed with HPT, add that to the cost of the injectors.

[Alvin]

Hunting down a bad miss on cylinder 8 in my LH6. Have done new plugs/wires, swapped coils around and the issue stays. About to do leakdown/compression test, but want to order injectors to get them on their way in case its that. Anyone have a good source? I see ACDelco's listed on ebay but don't want to risk getting a knockoff that makes my issue worse.

There are some truck 50's that drop right in on that application that would be cheaper. We sell them but they are also on ebay. There are links floating around here. They are very cheap.

[gtstorey]

There are some truck 50's that drop right in on that application that would be cheaper. We sell them but they are also on ebay. There are links floating around here. They are very cheap.

If you are talking about the 12613412 injector, the known good source on eBay that everyone was using has dried up. Not sure that I would trust any of the others on eBay. It looks like pmcofnc's price is cheaper than rockauto.