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Use this Location KEYwhen ordering your parts. Used - Engine Control Module (ECM) This unit came out of a running vehicle   PART # 12576106,YCTJ   ALWAYS CHECK WITH THE DEALER OR YOUR MECHANIC BEFORE YOU BUY ,TO SEE IF IT  NEEDS TO BE REPROGRAMED FOR YOUR MILEAGE AND YOUR OPTION THAT CAME WITH YOUR VEHICLE. According to the interchange this item will fit: AVALANCHE 1500 03 Elec Cont Unit (ECU); (LH Fr under battery) AVALANCHE 1500 04 Elec Cont Unit (ECU); (LH Fr under battery), ID 12602802 AVALANCHE 1500 05-06 Elec Cont Unit (ECU); (LH Fr under battery) ENVOY XL 03 Elec Cont Unit (ECU); 5.3L (next to air box) ESCALADE 03 Elec Cont Unit (ECU); (LH Fr under battery), PCM ESCALADE 04 Elec Cont Unit (ECU); (LH Fr under battery), ID 12602802 ESCALADE 05-06 Elec Cont Unit (ECU); (LH Fr under battery) ESCALADE ESV 03 Elec Cont Unit (ECU); (LH Fr under battery), PCM ESCALADE ESV 04 Elec Cont Unit (ECU); (LH Fr under battery), ID 12602802 ESCALADE ESV 05-06 Elec Cont Unit (ECU); (LH Fr under battery) ESCALADE EXT 03 Elec Cont Unit (ECU); (LH Fr under battery), PCM ESCALADE EXT 04 Elec Cont Unit (ECU); (LH Fr under battery), ID 12602802 ESCALADE EXT 05-06 Elec Cont Unit (ECU); (LH Fr under battery) HUMMER H2 03 Elec Cont Unit (ECU); (LH Fr under battery) HUMMER H2 04 Elec Cont Unit (ECU); (LH Fr under battery), SUV HUMMER H2 05-06 Elec Cont Unit (ECU); (LH Fr under battery) HUMMER H2 07 Elec Cont Unit (ECU); (LH Fr under battery), PCM ISUZU ASCENDER 03 Elec Cont Unit (ECU); (LH eng), 5.3L SIERRA 1500 PICKUP 03 Elec Cont Unit (ECU); (LH Fr under battery), w/o 4.3L SIERRA 1500 PICKUP 04 Elec Cont Unit (ECU); (LH Fr under battery), w/o hybrid; w/o 4.3L; ID 12602802 SIERRA 1500 PICKUP 05-06 Elec Cont Unit (ECU); (LH Fr under battery), w/o hybrid; w/o 4.3L SIERRA 1500 PICKUP 07 Elec Cont Unit (ECU); classic style, (LH Fr under battery), w/o hybrid; w/o 4.3L SIERRA 2500 PICKUP 03 Elec Cont Unit (ECU); (LH Fr under battery), gasoline, 6.0L SIERRA 2500 PICKUP 04 Elec Cont Unit (ECU); (LH Fr under battery), gasoline, 6.0L, ID 12602802 SIERRA 2500 PICKUP 05-06 Elec Cont Unit (ECU); (LH Fr under battery), gasoline, 6.0L SIERRA 2500 PICKUP 07 Elec Cont Unit (ECU); classic style (creased Dr skin), (LH Fr under battery), gasoline, 6.0L SIERRA 3500 PICKUP 03 Elec Cont Unit (ECU); (LH Fr under battery), gasoline, 6.0L SIERRA 3500 PICKUP 04 Elec Cont Unit (ECU); (LH Fr under battery), gasoline, 6.0L, ID 12602802 SIERRA 3500 PICKUP 05-06 Elec Cont Unit (ECU); (LH Fr under battery), gasoline, 6.0L SIERRA 3500 PICKUP 07 Elec Cont Unit (ECU); classic style (creased Dr skin), (LH Fr under battery), gasoline, 6.0L SIERRA DENALI 03 Elec Cont Unit (ECU); (LH Fr under battery) SIERRA DENALI 04 Elec Cont Unit (ECU); (LH Fr under battery), ID 12602802 SIERRA DENALI 05-06 Elec Cont Unit (ECU); (LH Fr under battery) SIERRA DENALI 07 Elec Cont Unit (ECU); classic style (creased Dr skin), (LH Fr under battery) SILVERADO 1500 PICKUP 03 Elec Cont Unit (ECU); (LH Fr under battery), w/o 4.3L SILVERADO 1500 PICKUP 04 Elec Cont Unit (ECU); (LH Fr under battery), w/o hybrid; w/o 4.3L; ID 12602802 SILVERADO 1500 PICKUP 05-06 Elec Cont Unit (ECU); (LH Fr under battery), w/o hybrid; w/o 4.3L SILVERADO 1500 PICKUP 07 Elec Cont Unit (ECU); classic style, (LH Fr under battery), w/o hybrid; w/o 4.3L SILVERADO 2500 PICKUP 03 Elec Cont Unit (ECU); (LH Fr under battery), gasoline, 6.0L SILVERADO 2500 PICKUP 04 Elec Cont Unit (ECU); (LH Fr under battery), gasoline, 6.0L, ID 12602802 SILVERADO 2500 PICKUP 05-06 Elec Cont Unit (ECU); (LH Fr under battery), gasoline, 6.0L SILVERADO 2500 PICKUP 07 Elec Cont Unit (ECU); classic style (creased Dr skin), (LH Fr under battery), gasoline, 6.0L SILVERADO 3500 PICKUP 03 Elec Cont Unit (ECU); (LH Fr under battery), gasoline, 6.0L SILVERADO 3500 PICKUP 04 Elec Cont Unit (ECU); (LH Fr under battery), gasoline, 6.0L, ID 12602802 SILVERADO 3500 PICKUP 05-06 Elec Cont Unit (ECU); (LH Fr under battery), gasoline, 6.0L SILVERADO 3500 PICKUP 07 Elec Cont Unit (ECU); classic style (creased Dr skin), (LH Fr under battery), gasoline, 6.0L SSR 03 Elec Cont Unit (ECU); (next to air box) SUBURBAN 1500 03 Elec Cont Unit (ECU); (LH Fr under battery) SUBURBAN 1500 04 Elec Cont Unit (ECU); (LH Fr under battery), ID 12602802 SUBURBAN 1500 05-06 Elec Cont Unit (ECU); (LH Fr under battery) SUBURBAN 2500 03 Elec Cont Unit (ECU); (LH Fr under battery), 6.0L SUBURBAN 2500 04 Elec Cont Unit (ECU); (LH Fr under battery), 6.0L, ID 12602802 SUBURBAN 2500 05-06 Elec Cont Unit (ECU); (LH Fr under battery), 6.0L TAHOE 03 Elec Cont Unit (ECU); (LH Fr under battery) TAHOE 04 Elec Cont Unit (ECU); (LH Fr under battery), ID 12602802 TAHOE 05-06 Elec Cont Unit (ECU); (LH Fr under battery) TRAILBLAZER EXT 03 Elec Cont Unit (ECU); 5.3L (next to air box) YUKON 03 Elec Cont Unit (ECU); (LH Fr under battery) YUKON 04 Elec Cont Unit (ECU); (LH Fr under battery), ID 12602802 YUKON 05-06 Elec Cont Unit (ECU); (LH Fr under battery) YUKON XL 1500 03 Elec Cont Unit (ECU); (LH Fr under battery) YUKON XL 1500 04 Elec Cont Unit (ECU); (LH Fr under battery), ID 12602802 YUKON XL 1500 05-06 Elec Cont Unit (ECU); (LH Fr under battery) YUKON XL 2500 03 Elec Cont Unit (ECU); (LH Fr under battery), 6.0L YUKON XL 2500 04 Elec Cont Unit (ECU); (LH Fr under battery), 6.0L, ID 12602802 YUKON XL 2500 05-06 Elec Cont Unit (ECU); (LH Fr under battery), 6.0L *This Auction is for the computer only and does not included reprogramming* Please confirm compatibility below before Buying Our Business Hours: 9 AM to 4 PM EST M-F No Weekends or National Holidays  General Policies If you have a question about a part you must email us BEFORE bidding or buying. We try to answer all email within 1-2 business days. We ship to Confirmed PayPal addresses only. We export - Contact us for shipping price BEFORE bidding or buying. Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer’s responsibility. Immediate payment required via PayPal. We will refund your payment if it does not match these guidelines. Returns All non-electric items are returnable within 30 days upon delivery the item, minus shipping & restocking fee. All electrical items are returnable within 14 days upon delivery the item, minus shipping & restocking fee. Returned items will also be subject to a 20% restocking fee at our discretions, and must be in resalable condition. Any shipping, installation, labor, towing, rentals, storage, legal fees, lost wages or any other incidental fees are non-refundable under any Circumstances. Items that have been altered (without our email consent as an eBay record) are non-returnable. If an item arrives damaged, it must be reported to us immediately, so that we can refund or exchange at our discretions. Buyer must eMail us immediately, if the Item was ordered incorrectly! Payment All purchases must be paid through eBay with Immediate Payment via PayPal. NO EXCEPTIONS! Shipping PayPal Confirmed Addresses ONLY! You must contact us for shipping charges BEFORE bidding or buying, if you live outside the 48 Continental United States. We do export - You must contact us for shipping charges BEFORE bidding or buying. (See Export below) Export ONLY after a confirmed eMail with additional costs from us, if no eMail is received from you, your bid will be declined. No Expedited Shipping. You must contact us via eBay eMail for any Combined Shipping on multiple items. We are not responsible for any delays by the shipping carrier. Export Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer’s responsibility. Please check with your country’s customs office to determine what these additional costs will be prior to bidding or buying. These charges are normally collected by the delivering freight (shipping) company or when you pick the item up – do not confuse them for additional shipping charges.” “We do not mark merchandise values below value or mark items as ‘gifts’ - US and International government regulations prohibit such behavior.” We are not responsible for any delays by the shipping carrier. For Local Pickups The company is a on line store only and you will still need to pay through PayPal with the freight and any state taxs and then we will Refund the freight back to you.This is  because the product is not listed as local pickup and we can't change that,before you buy email us through Ebay so the shipping department does not ship the product.We will email you through Ebay with the number to call so you can make arrangements to pick up the product.The warehouse is open 9:00am to 4:00pm EST. Monday through Friday (NO NATIONAL HOLIDAYS) Questions Please, If you have any questions about the item or shipping after completely reading this policy, email us through the link on eBay.