This truck has a Hybrid electronic cluster, a central timer module, and the GEM(generic electronic module, to self test it, do this and post the codes:
Using Hybrid Electronic Cluster To enter Hybrid Electronic Cluster (HEC) self-diagnostics, press instrument cluster SELECT/RESET button before turning ignition switch to RUN position. Within 5-8 seconds, odometer will display "tESt". SELECT/RESET button must be released within 3 seconds of odometer displaying "tESt" then, repeatedly press SELECT/RESET button through odometer displays until "dtc" is displayed. When odometer displays "dtc", press SELECT/RESET button again and any continuous diagnostic trouble codes will be displayed before odometer advances to next display. Other HEC diagnostic modes can be entered when self-diagnostic function is entered. See HYBRID ELECTRONIC CLUSTER SELF- DIAGNOSTIC MODES table.
Saturday, February 14th, 2009 AT 6:44 AM