If you turn your key on/off three times and it does not show any codes or for that matter does nothing, I wonder if that means there is a communication problem somewhere. I have a scanner and I have 2 tranny codes but the odometer shows nothing? Anyone have any input on this.

 

it depends on the year of your truck. My 99 doesn't do the key trick either. I think it is 01's and up or maybe 00's.... for sure 01's and up though. What year is yours??
TNutcher

 

I have a 98, but what shovelhead said is that 99 models dont have that option so I not sure what years they put this option on.

 

According to the Hayne's service manual "On 1998/99 models you'll need an aftermarket scan tool to extract diagnostic trouble codes". The scan tool they're talking about is a OBD-II scan tool.

 

mgstroker95 if your truck would show codes it would at least say P_done my bros 00 does it and dads 99 dont so its right in that period when they changed it

 

The '98.5 and '99 24 valve trucks don't do the "three Key Cycle" trick.
2000 and up will.

 

Thanks for all the info guys.... I have a scan tool so its all good!