to get hrs, have key on [engine off]with main odo showing then press and hold trip odo button till hr's appear. for a guage check press and hold odo button w/ key off then turn the key to on. engine off key pos in on, not start. an entertaining show will appear on dash. for code retrieval have key in off position and turn key to on 3 times then leave on for codes to appear in odo window. when finished it reads 'done'
a tech with the big handheld comptr that plugs in obd port under dash can tell hrs, total miles, highest speed, amnt fuel used,mpg thruout life of truck. hrs idled, amnt fuel used idleing, percent of time that x amount of throttle is used. can telll if ya hotrod or drive like a granny and what percent of time etc. lotta info in there
i was suprised when at a bombparty in idaho a dlr tech showed with his big scanner deal and plugged in under dash of my previous truck. had 251 total hrs but i wasted 52 of em idleing. had used 600 total gallllons fuel and 26 were wasted at idle. truck averaged till that time 14 mpg. lot of time towing.
the tech said i drove fairly easy most of the time but hen i go to pass i put my foot down all the way down. interesting