The stock gp's are 7v ceramic, DC offered a 5V metallic alternative that required reflash of the ECU and a new GP relay module. The ceramic GP's can and have disintegrated causing sever engine damage.
Most of us have been changing the 7v ceramic with 7v etcno metallic GP's. no reflash or gp relay module changes required.
The etcno GP's are available for IDParts. You should change them all out if your switching.
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2005 CRD "
Ol' Blue"
Red Ryder carbine-action, two hundred shot range model air rifle with a compass in the stock and this thing which tells time.
My build page- RL Komodo Rear and TJM Front Bumper, armored, lifted, JBA Steel D30, 4.10s and ARB air lockers.