'99 Sub carryover model (actually produced in early '98) K2500 7.4. Looking for ignition upgrades and possible chip upgrade. All ready has dual exh (true duals not cat back) and K&N FIPK (noisy little air sucker under power). Any suggestions on ignition & chips would be greatly appreciated. It's got a little over 100k on it now and I've got do do some ignition replacement anyway.

Thanks........Steve

it does not take chips you need a programmer hypertech has one.

i have a 7.4 vortec in my 99 gmc 2500 suburban also... i tryed hypertech... but i purchased a jet module hook it up to ur computer it does wonders with this u can smoke ur back tires.. 2500 cant do that factory..
hypertech reprograms ur system... jet fine tunes..