which pins to ground on a 98 for code flash?

[mike micklich]

looking into fixing a 98 don't want to ground the wrong pins

[CareyWeber]

Mike,

The OBD II trucks +>97 can't have their codes read by grounding the pins they can only be read with a code reader/scan tool.

The 94 - 95 can be read by grounding the connector.

note I'm not sure about the 96's, but I think they are OBD II too.

Carey

[Turbine Doc]

Mike,
Places like Auto Zone usually have the reader tools and will check your codes for free, all theirs do though usually is just read hard set codes, if you get a code post here and the group can help you figure out what to do about it. Also if you know a good auto repair tech you can trust, a Snap-On scanner which many shops have shows codes as well as a dealer with tech-2. Tech -2 is the proper tool as it has more test capability/functionality.

[MikeC]

Also, my local Auto Zone could only read engine codes, no Trans codes. Found out a friend had a Snap On scanner and it read both.

Yes, 96's are OBD II.

Mike