4PCS 13502751 12V 35A Micro-ISO 5-Pin SPDT Relay for Buick/Cadillac/Chevrolet/GMC Underhood Fuse Block Multi-Purpose, Replaces 19116058/19115082/13500126/D1780C/15-50448

What it is: 12V DC, 35A, 5-pin SPDT micro-ISO relay (Micro 280). Terminals: 30, 85, 86, 87, 87a. Plug-in mount; continuous duty.Direct OE numbers: 13502751; supersession path 19116058 → 13500126. Common equivalents used by manufacturers: D1780C, 15-50448, 19115082.Where it goes: Underhood fuse/relay center or interior/body fuse panel (check lid legend for the exact cavity name/position).What it controls: Fuel pump prime/run, radiator/condenser fan, A/C compressor clutch, power door locks, daytime running/headlamp/fog circuits, wiper motor, and other high-current switched loads (vehicle-dependent).Fixes: No-start/no-prime, fans not engaging, inoperative lights/locks, intermittent clicking from the relay block, or melted/weak contacts.Verify before install: Match the part number and the 5-blade layout (with 87a). Confirm your block accepts Micro 280 relays and that the cavity calls for SPDT (not 4-pin).Package includes: 1 × 13502751 relay (no bracket). Installation takes minutes—disconnect battery, pull old relay straight up, seat new relay fully.

• Spec & OE interchange — 12V DC, 35A high-current, 5-pin SPDT micro-ISO (Micro 280 footprint) relay; blade terminals 30/85/86/87/87a. Direct replacement for OE number 13502751; also seen as OE supersession 19116058 → 13500126; common equivalents include D1780C, 15-50448, 19115082. Plug-in mount; continuous duty; plastic shell; fits underhood/interior relay centers.
• Function & install — Used in fuse/relay centers for fuel pump, engine cooling fan, A/C compressor clutch, door locks, DRL/headlamp/fog circuits, wiper motor, and other control loads. Typical symptoms: no-start/no-prime, fans not engaging, inoperative lights/locks, intermittent clicking. Location is usually in the underhood fuse block or body/interior fuse panel; verify slot labeling.
• Verified fit — Cadillac CTS: Compatible with 2008 Cadillac CTS Power Door Lock Relay; Compatible with 2009 Cadillac CTS Power Door Lock Relay; Compatible with 2010 Cadillac CTS Power Door Lock Relay; Compatible with 2011 Cadillac CTS Power Door Lock Relay; Compatible with 2012 Cadillac CTS Radiator Cooling Fan Motor Relay; Compatible with 2015 Cadillac CTS Power Door Lock Relay.
• Verified fit — Chevrolet Malibu: Compatible with 2010 Chevrolet Malibu Daytime Running Light Relay (2 per car in some trims).
• Verified fit — Buick Lucerne: Compatible with 2006 Buick Lucerne Fuel Pump Relay; Compatible with 2007 Buick Lucerne Fuel Pump Relay; Compatible with 2008 Buick Lucerne Fuel Pump Relay; Compatible with 2009 Buick Lucerne Fuel Pump Relay; Compatible with 2010 Buick Lucerne Fuel Pump Relay; Compatible with 2011 Buick Lucerne Fuel Pump Relay.
• Verified fit — GMC Sierra 2500 HD: Compatible with 2015 GMC Sierra 2500 HD Wiper Motor Relay; Compatible with 2020 GMC Sierra 2500 HD Fog Light Relay; Compatible with 2021 GMC Sierra 2500 HD Fog Light Relay; Compatible with 2022 GMC Sierra 2500 HD Fog Light Relay; Compatible with 2023 GMC Sierra 2500 HD Fog Light Relay; Compatible with 2024 GMC Sierra 2500 HD Fog Light Relay; Compatible with 2025 GMC Sierra 2500 HD Fog Light Relay
• Verified fit — Chevrolet trucks: Compatible with 2003 Chevrolet Silverado 1500 Power Door Lock Relay; Compatible with 2024 Chevrolet Silverado 2500 HD Fuel Pump Relay.
• Complements (not substitutes) — Often paired with other micro relays in the same block, such as 13500114 (4-pin micro relay) or 13500113 for lighting/aux circuits. Consider adding mini fuses and a relay puller to fix companion faults. Use these with 13502751 when circuits use multiple relays (e.g., fan low/high, headlamp, A/C).