About This COMPATIBLE VEHICLE MODELS: For Peterbilt 337 trucks, For Peterbilt 348 models, For Peterbilt 379 conventional trucks, For Peterbilt 389 heavy duty trucks DIRECT OEM REPLACEMENT PART NUMBERS: Replaces Q21-6119 climate control module with identical connector interface and mounting specifications for proper fitment AUTOMATIC VEHICLE CONFIGURATION SYSTEM: Features integrated software that automatically detects and configures unit settings when connected eliminating manual programming requirements HEAVY-DUTY CONSTRUCTION QUALITY: Manufactured to meet industrial and automotive environment standards providing reliable performance and long-term durability in commercial truck applications STRAIGHTFORWARD INSTALLATION PROCESS: Designed as direct plug-and-play replacement with proper connector alignment and mounting provisions for simplified installation procedures Overview Operation Mode : ON-OFF Current Rating : 8 Amps Operating Voltage : 12 Volts Contact Type : Normally Open Connector Type : Plug In Brand : LORPHEIR Switch Type : Push Button Terminal : Screw Material : A/C Climate Control Module Panel Item dimensions L x W x H : 10 x 3 x 3 inches