Hand holding a metal EEC computer module with labeled calibratio…

Calibration Code Locations
http://www.oldfuelinjection.com/?p=17

To remove the EEC, it may be necessary to either buckle the plastic wheelwell down using a heavy tool, or to remove several of its screws so it hangs down, allowing the EEC to slide forward & out of the firewall into the engine bay.

I haven't found any pattern to which trucks got the A-pillar sticker, but it appears to be ONLY after '92.

Owner caption December 2011 · Photo 3951 of 6546