Swapping 98 ecu with 96 ecu, will it work?

[Jan]

Hi folks, new here but been following here before registered.

I own 2 suburbans, one 96 and one 98. Both of them are 1500 model with 8lugs, no EGR, same drivetrains, same color, same engines only the year is seperating them and the option LS/LT. Trans should be same, tranfser box is 241/243 I think. Both of them are vacum controlled on wastegate.

96 sub 1GNGK16F1TJ344243
98 sub 1GNGK16F9WJ375308

My 96 have a unknown perfomance chip (previously owner claimed 40hp) I upgraded it to 3" exhaust, no gauges. I drove it like this for 20k over a year, ran like a champ. I did little or less towing tho. It has 413 000 km on it now.

Will this ecu w/chip fit into my 98 and just fire it up ready to go?

[DmaxMaverick]

Welcome aboard!

Simply, yes.

[a5150nut]

I thought only 94 and 95 had replaceable chips and anything newer should be sent to Kennedy for a programing upgrade.

[DmaxMaverick]

I thought only 94 and 95 had replaceable chips and anything newer should be sent to Kennedy for a programing upgrade.

Yes/no. He's talking about taking the ECM from one truck and swapping it into another like truck. They need to be "programmed" by someone who can, with the equipment to do it, if an "upgrade" (chip, power program, etc.) is desired. Once programmed, by GM or aftermarket, they will work in any like vehicle/powertrain of same OBD standard.

[Jan]

Thank you all for feedback

Reason doing this, is that I plan to sell my 96 truck. Moving everything over to the new one saves me some money.

My other thought is the security light in dash on 98 year, does it operate together with ECM or does it have little meaning when doing the change?

[DmaxMaverick]

The security system on your 1998 isn't related to the ECM. The BCM and radio systems control the Theft-Lock security system. No worries.