Standard Ignition RY-827 Trailer Tow Relay

Trailer Tow Relay for Select GM Applications

Standard Ignition RY-827 is a 12-volt trailer tow relay built for select Buick, Chevrolet, GMC, Pontiac, Saturn, Suzuki, and Hummer applications. It uses a 4-terminal square connector with male blade terminals and a 20 amp amperage rating for direct replacement service in the vehicle’s electrical system.

Key Features

• 12-volt trailer tow relay for electrical and body system service
• 20 amp amperage rating
• Square connector shape with 4 male blade terminals
• Relay function only
• Composite housing for resistance to harsh underhood temperatures and conditions
• Brass or copper contacts where specified for wear resistance
• Manufactured to stringent quality requirements in TS16949 and ISO9001 certified plants

Product Details

Standard Ignition RY-827 is built as a replacement trailer tow relay for vehicles that use a 4-terminal relay layout. The composite housing helps protect the relay from heat and demanding underhood environments, while specified brass or copper contacts support long-term electrical performance. This part cross-references Four Seasons 37564 and Gates 20603 for the same application. Common fitment includes 2005-2009 Chevrolet Equinox, 2005-2009 Chevrolet Uplander, 2007-2009 Pontiac Torrent, and 2006-2008 Hummer H3, along with additional Buick, GMC, Saturn, and Suzuki applications. Standard Ignition RY-827 is also listed for 2007-2009 Buick Lucerne and 2005-2007 Saturn Relay.

What This Relay Helps Address

• Trailer tow relay failure causing loss of towing circuit operation
• Intermittent electrical switching in the tow relay circuit
• Relay-related no-function conditions in the body electrical system
• Heat-related relay wear from underhood exposure
• Connector mismatch when replacing a 4-terminal square relay

Installation Notes and Tips

Verify the relay connector shape, terminal count, terminal type, and voltage before installation. Confirm the vehicle uses a 4-terminal relay layout and match the original application by year, make, and model. For fitment, this part fits 2005-2009 Chevrolet Equinox, 2007-2009 Pontiac Torrent, and 2006-2008 Hummer H3; it also fits 2007-2009 Buick Lucerne, N/A position, 4 Term. Clean the relay socket before installing the new relay to help ensure a secure electrical connection.

Quality Assurance

Standard Ignition manufactures this relay to stringent quality standards in TS16949 and ISO9001 certified facilities. The housing and contact materials are selected to support reliable service in demanding automotive electrical applications.