GM 12621820 Knock Detonation Sensor ACDelco and similar items

PLEASE READ: All the parts we sell are from dealership buyouts. We can only go by the part number on the box or the part and use the internet to search for fitment. Mistakes can happen. Please look closely at the pictures, and ask any questions before you purchase. We are not responsible if this item does not fit your application. We do not know if your application has had modifications that would change the fitment of parts. Please do your own research. Some of these older parts have been warehoused for a long time, they may be dirty and dusty or have slight imperfections from stacking/handling and what not. If you have a concern about the functionality due to shelf life please use your own judgement or ask any specific questions pertaining to such. We try and notate any imperfections we see, however we can not always know what is important to each person. Check your fitment please! Look closely at the pictures. Please read all of this before bidding/buying: Please do your own research for fitment to your application. We are not responsible if it does not fit your machine and we do not accept returns for fitment issues! on or buying this item you are responsible for the safe and proper installation of the parts and the final inspection as to the condition of them. We take no responsibility for any damage or injury due to the use of this item. We always answer all questions. If you do not receive an answer, please check that your email address is the one registered with, and check your spam filter. Please note that the compatibility chart is not always accurate and any fitment information in this listing should be used as a guide, only, and may not take into account build dates, model changes, trim levels, or modifications. It is your responsibility to verify fitment with your dealer or mechanic and make sure that this is what you need BEFORE you make the purchase! We make every effort to correctly identify the item and provide the proper fitment information, if available, and we try to provide photos of any defects and/or provide a good description of them, but we are human and mistakes can happen. If we make a mistake, we will make it right, but we cannot take responsibility for your mistakes. Please do your part, do your research, and buy responsibly. This will avoid either you being stuck with a part you don?t need, or you having to pay to ship it back, plus a 20% restocking fee, which is to help us recoup some of what it cost us to originally ship the part to you. Please take the time to READ THE LISTING and LOOK AT THE PICTURES! We keep all of our listed items onsite, in our warehouse. We take pictures of the actual item, so what you see in the pictures is what you will actually get. If we have more than one of an item, they will all be in at least the same condition as the one pictured. Being stored in a warehouse, it will most likely be dirty and dusty. The box or outer packaging may be less than perfect and it will have been opened for picture taking purposes. This does not mean it is used or defective. It just means it is dirty and dusty. The part may have been made by a different manufacturer than they use today and it may not look the same as a new retail one from the dealership. It may have been re-boxed and returned. This does not mean it is not an OEM part. It just means it was made in a different time period by a different manufacturer. We will gladly discount shipping on multiple wins if free shipping is not already offered. The discount will depend on weight, destination, and the items' ability to pack together. Please wait until you receive a combined invoice before sending payment. We ship most smaller items USPS First Class or Priority mail, so that you get your stuff FAST. Big stuff goes Fed Ex or UPS. We usually ship within 24 hours of payment received, excluding holidays and Sundays. As we include free shipping with the majority of our items, we reserve the right to choose which shipping service will be used. If you have a specific need, please ask before you buy to see if we can accommodate you. All other shipping quotes given on e-bay are strictly estimates. You may also come and pick up any item you win. International buyers: Please use the drop down menu to find your country and shipping cost. The cost is calculated by the USPS, according to your location. Please do not ask us to change the value on the customs form, as we will not do it. If you ask questions in a language other than English, we cannot reply. We are not responsible for any shipping and/or customs delays or extra fees. If you have an issue after receiving an item, please contact us and we will try and work it out. Please do not just leave negative feedback or less than five stars without giving us a chance to make it right. Payment is due within 3 days. Returns will only be accepted if item is not as described. No returns on electrical items and parts. Please make sure the item is what you need and that the fitment is correct before you purchase. This includes helmets, gloves, and all other items of apparel. As referenced above, we do charge a 20% restocking fee on all accepted returns. Since we offer free shipping on the majority of our items, this fee is to help us recoup some of that original shipping cost as, in order to stay competitive and offer the best deals possible, we do not build that into the price of the item. Thank you for taking the time to read this. We want everyone to have a good experience and we appreciate your business! Robert and Yvonne.