The Bully Dog 46501 Heavy Duty WatchDog is a multi-functional digital gauge pack that will help you develop fuel saving driving habits and provide you with monitoring capabilites to keep track of vital engine functions. Fleet owners, fleet managers and owner operators can use the WatchDog as a tool for improvement and a tool for analysis; the WatchDog will allow you to record and download trip information into an Excel spreadsheet. The WatchDog also packs some very important features that drivers, in the past, have paid big bucks for like the ability to run vehicle diagnostics and the ability to change the top speed limiter. Features like these come standard on the WatchDog along with many more. Speed Limiter Adjustment The Bully Dog Watch Dog speed limiter adjustment allows you to adjust your top speed limit in the engine computer. This is perfect for those needing to adjust speed limits to remain compliant in any state or province. Avoid costly change fees and fines, the Watch Dog does it all. (Excludes Paccar MX-13) Gauges & Safety Warnings The Heavy Duty WatchDog can monitor up to four parameters at once! This helps prevent unsafe engine temps and paramteres. If those temps do go up, you'll instantly be notified via user defined visual and audbile alerts. Diagnostics Avoid the costs and downtime of bringing your truck to the shop. The Watch Dog will read and clear diagnostic trouble codes allowing you to perform vehicle diagnostics without having to be at the shop. Parameters Monitored: Speed RPM Boost Throttle LoadÂ Battery V CoolantÂ Intake TempÂ Oil Temp Oil PSIÂ Turbo EX TempÂ Fuel RateÂ Inst Econ Avg Econ Trip Dist Trip Fuel BD AuxÂ BD Pryo 1 & 2 Truck Pyro 1 & 2 Features: Multi-Function Gauge DisplayÂ Read & Clear Diagnostic Trouble Codes Set User Defined Warnings & Audible Alerts Caterpillar Applications: 1989-2003 14.6L 3406B 1989-2003 14.6L 3406C 1994-2000 14.6L 3406E 1989-2000 15.8L 3406E 2002-2010 7.2LÂ C-7 2004-2010 9.3LÂ C-9 1999-2003 10.3L C-10Â 2004-2010 11.1LÂ C-11 1997-2003 12.0L C-12Â 2004-2010 12.5L C-13 1999-2004 14.6LÂ C-15 2005-2010 15.2LÂ C-15 ACERT 1999-2003 15.8L C-16 Cummins Applications: 2007-2010 8.3LÂ ISC 2010-2013 8.3LÂ ISC 2007-2010Â 8.9LÂ ISL 2010-2013 8.9L ISL 9 2004-2010 10.8L ISM 2010-2011 11.9L ISX 2011-2013 11.9L ISX 12 2010-2013 14.9LÂ ISX 15 2004-2007 14.9LÂ ISX CM870 2008-2010 14.9LÂ ISX CM871Â Detroit Application: 2007-2010 12.8L DD13 2007-2010 14.8L DD15 1999-2007 12.7L Series 60 2001-2010 14.0L Series 60Â Mercedes Applications:Â 2007-2010 7.2LÂ MBE 900 2007-2010 12.8L MBE 4000Â Â Paccar Applications:Â 2010-2012 12.9L MXÂ Â 2013 12.9L MX-13Â 2008-2012 8.3L PX-8 2013 8.9L PX-9 Not available for sale in the state of California Click here to read Emissions Notice.