{"$schema": "https://iptc.org/std/ninjs/ninjs-schema_3.2.json", "uri": "urn:newsml:wireva.mib.news:item:f3ed4af2-8d74-4d4e-a6e2-471a2009a09e", "type": "text", "profile": "standard", "version": "1", "versioncreated": "2026-09-21T18:04:57.761189Z", "firstcreated": "2026-09-21T18:03:20.389222Z", "pubstatus": "usable", "urgency": 5, "language": "en", "headline": "GM Confirms 8.3-Litre Duramax Mongoose Diesel for 2027 Silverado HD and Sierra HD", "byline": "Edward Beaumont", "located": "United Kingdom", "copyrightholder": "Haydamax OÜ", "copyrightnotice": "Wireva / Nobel", "usageterms": "Subscribers may republish this item in full, including translation and trimming, with the credit “Wireva / Nobel”. Set rel=canonical to https://nobel.observer/business/gm-confirms-8-3-litre-duramax-mongoose-diesel-for-2027-silverado-hd-and-sierra-hd/ when publishing on the web.", "description_text": "General Motors has confirmed an all-new 8.3-litre Duramax turbodiesel V8, nicknamed Mongoose, that will power the refreshed 2027 Chevrolet Silverado HD and GMC Sierra HD as a direct challenge to Ford's 6.7-litre Power Stroke Scorpion.", "altids": {"mosaic": "f3ed4af2-8d74-4d4e-a6e2-471a2009a09e", "story": "7d5f97b5-9bb7-44d6-8dd7-f4c09528454e", "slug": "gm-confirms-8-3-litre-duramax-mongoose-diesel-for-2027-silverado-hd-and-sierra-hd"}, "subject": [{"name": "Economy and business", "rel": "direct", "literal": "economy", "code": "medtop:04000000", "scheme": "http://cv.iptc.org/newscodes/mediatopic/", "uri": "http://cv.iptc.org/newscodes/mediatopic/04000000"}], "place": [{"name": "United Kingdom", "literal": "gb", "code": "GB", "scheme": "http://cv.iptc.org/newscodes/countrycodes/"}], "person": [], "organisation": [], "genre": [{"name": "Standard story", "literal": "standard"}], "service": [{"name": "Wireva", "literal": "wireva"}], "associations": {"featuremedia": {"uri": "urn:newsml:wireva.mib.news:media:202365cf-8e8d-4b45-9cbc-b16f95e77a12", "type": "picture", "version": "1", "pubstatus": "usable", "headline": "GM’s New 8.3-Liter Duramax Is Called Mongoose Because It Wants To Eat Ford’s Scorpion", "description_text": "GM Confirms 8.3-Litre Duramax Mongoose Diesel for 2027 Silverado HD and Sierra HD", "copyrightholder": "carscoops.com", "copyrightnotice": "GM’s New 8.3-Liter Duramax Is Called Mongoose Because It Wants To Eat Ford’s Scorpion", "usageterms": "Picture belongs to the source publication: address and terms are delivered, the file is not.", "altids": {"wireva": "202365cf-8e8d-4b45-9cbc-b16f95e77a12"}, "extra": {"wireva:delivery_mode": "link_only", "wireva:rights": {"licence": "", "licence_url": "", "licence_raw": "RSS source", "licence_verified_at": "2026-09-21T18:04:57.780137Z", "attribution_required": true, "attribution_text": "GM’s New 8.3-Liter Duramax Is Called Mongoose Because It Wants To Eat Ford’s Scorpion", "redistribution_allowed": false, "commercial_use_allowed": false, "modifications_allowed": false, "share_alike_required": false}, "wireva:provenance": {"creator": "", "source_name": "carscoops.com", "source_url": "https://www.carscoops.com/wp-content/uploads/2026/09/Chevrolet_MvS_16x9_02-1024x576.jpg", "source_page_url": "https://www.carscoops.com/wp-content/uploads/2026/09/Chevrolet_MvS_16x9_02-1024x576.jpg", "our_page_url": "https://nobel.observer/business/gm-confirms-8-3-litre-duramax-mongoose-diesel-for-2027-silverado-hd-and-sierra-hd/"}, "wireva:role": "lead"}, "renditions": {"source": {"href": "https://www.carscoops.com/wp-content/uploads/2026/09/Chevrolet_MvS_16x9_02-1024x576.jpg", "mimetype": "image/jpeg"}}}}, "extra": {"wireva:story": {"uri": "urn:newsml:wireva.mib.news:story:7d5f97b5-9bb7-44d6-8dd7-f4c09528454e", "slug": "all-supporting-acts-withdraw-from-ed-sheerans-loop-tour-in-solidarity-with-macklemore-20260915", "status": "updated", "languages": ["de", "en", "es", "fr", "it", "uk"], "item_count": 27, "is_breaking": false}, "wireva:rights": {"class": "agency_original", "redistribution_allowed": true, "commercial_use_allowed": true, "modifications_allowed": true, "share_alike_required": false, "attribution_required": true, "attribution_text": "Wireva / Nobel", "canonical_required": true, "canonical_url": "https://nobel.observer/business/gm-confirms-8-3-litre-duramax-mongoose-diesel-for-2027-silverado-hd-and-sierra-hd/", "linkback_required": true, "licence": "Wireva subscriber licence", "licence_url": "", "licensor": "Haydamax OÜ", "valid_until": null, "excerpt_max_chars": 0, "decided_by_rule": "agency_original_verified", "needs_review": false}, "wireva:provenance": {"production_method": "automated", "ai_stages": {"editing": true, "drafting": true, "headline": true, "discovery": true, "classification": true, "image_selection": true, "source_collection": true, "cross_source_comparison": true}, "model": "", "human_reviewed": false, "reviewed_by": "", "reviewed_at": null, "editorial_control": true, "editorial_responsibility": "Haydamax OÜ (Wireva)", "factchecked": false, "verification_status": "multi_source", "independent_confirmations": 1, "official_source_used": false, "used_press_release": false, "public_interest": true, "ai_disclosure_required": true, "ai_disclosure_text": "This item was produced with AI assistance under the editorial responsibility of Haydamax OÜ.", "independence_check": {"status": "passed", "score": 0.115, "checked_at": "2026-09-21T18:04:57.776649Z"}}, "wireva:publication": {"name": "Nobel", "domain": "nobel.observer", "country": "GB", "url": "https://nobel.observer/business/gm-confirms-8-3-litre-duramax-mongoose-diesel-for-2027-silverado-hd-and-sierra-hd/"}, "wireva:links": {"self": "https://wireva.mib.news/api/v1/items/f3ed4af2-8d74-4d4e-a6e2-471a2009a09e", "html": "https://wireva.mib.news/item/f3ed4af2-8d74-4d4e-a6e2-471a2009a09e/gm-confirms-8-3-litre-duramax-mongoose-diesel-for-2027-silverado-hd-and-sierra-hd/", "story": "https://wireva.mib.news/story/all-supporting-acts-withdraw-from-ed-sheerans-loop-tour-in-solidarity-with-macklemore-20260915/"}, "wireva:metrics": {"word_count": 329, "char_count": 2103, "reading_time_seconds": 150}}}