I ran across something that most people dont know about on these
trucks. I Have tried this trick on an 01 and my 02 truck, but I can't
say if it works on any older models. Beware your trip odometer will be
reset after the test. Start the test with the ignition off. Press the
odo/trip odometer button and while holding it, turn the ignition on but
do not start the truck. Continue holding the button until "chec"
appears in the odometer window. The instrument cluster will then begin
its self diagnostic mode. when it is finished, the door alarm will
chime several times and the normal pre-start lights will be lit. If
there is a problem, it will spit out a 3 digit code in the odometer
window. Record it and then push the trip button to continue the test.
Well after spending most of the night in the shop with the truck having
electrical problems (ABS and Air Bag lights on, No power windows, no
pyro power, no speedo...) I went out this morning and loo...