3-Pack 15016745 4-Pin Headlamp/DRL Relay – Compatible with Chevrolet Trailblazer 02-09, GMC Envoy 02-09, Buick Rainier 04-07, Oldsmobile Bravada 02-04, Silverado/Sierra 10-13, Express/Savana 09-12

What it is: Aftermarket 4-pin headlamp/DRL multi-purpose relay compatible with OE 15016745, used on select platforms to restore reliable low-beam/daytime running light operation and other lighting functions where equipped.Key SpecificationsVoltage: 12V DCTerminals: 4 male bladeApprox. case size: 1.9 × 1.4 × 0.7 inDrop-in, plug-in installation in the under-hood fuse/relay centerOE & Cross ReferencePrimary OE reference: 15016745Cross-reference numbers (for search/identification): RY560 (Standard Motor Products), 1R1944 (Wells), 601-218 (Dorman)Related service update part used in recall repairs: 13506836 (not included)Location & SymptomsLocation: und

• SPEC & OE CROSS: 12V, 4 blade terminals; compact case ~1.9 × 1.4 × 0.7 in; OE reference 15016745. Cross-reference numbers for search: RY560 (Standard Motor Products), 1R1944 (Wells), 601-218 (Dorman). The later HDM service part used in recall repairs is 13506836 (listed here for compatibility context; not included in this listing).
• INSTALL & LOCATION: Installs in the under-hood fuse/relay center (headlamp driver/lighting relay position). Remove the old relay straight up, seat the new relay fully, then test low-beam/DRL. Typical issues addressed: intermittent or inoperative low-beam headlights/daytime running lights caused by a failing HDM/lighting relay.
• COMPATIBLE WITH CHEVROLET: verify by VIN/OE# 15016745, COMPATIBLE WITH Trailblazer 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 (incl. EXT where equipped); SSR 2004; Express (6.6L diesel) 2009, 2010, 2011, 2012; Silverado 2010, 2011, 2012, 2013.
• COMPATIBLE WITH GMC (compatible with; verify by VIN/OE# 15016745): COMPATIBLE WITH Envoy 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 (incl. XL 2003–2006, XUV 2004–2005); Savana (6.6L diesel) 2009, 2010, 2011, 2012; Sierra 2010, 2011, 2012, 2013.
• OTHER GM-PLATFORM FITMENT (compatible with; verify by OE# 15016745): COMPATIBLE WITH Oldsmobile Bravada 2002–2004; Buick Rainier 2004–2007; plus select platforms that use the equivalent HDM relay: Buick LaCrosse/Allure 2005–2010, Pontiac Grand Prix 2006–2008, Isuzu Ascender 2003–2008, Saab 9-7X 2005–2008.
• COMPLEMENTARY OE PARTS (not substitutes): Multi-use relay 13503102; accessory time-delay cutoff relay 13500114; HDM service-update relay 13506836 (used in safety recall repairs for certain vehicles). Replacing related relays/fuses in the same fuse block can reduce repeat electrical faults.
• PURCHASING NOTE: Match by VIN and the under-hood relay footprint/terminal layout. Functions can vary by vehicle (headlamps/DRL/fog/turn/cooling-fan on certain applications); always confirm the designated slot in your fuse/relay center before purchase.