2000SS1979

iTrader: (16)

Just like the title says. I want to make sure my stock 98 fuel gauge will still work.

bigboykilroy

iTrader: (48)

you cannot use a 99+ pcm and harness and have a working fuel gauge.
The 99+ harness is NOT compatible with the vehicle. there are several wires that need to be moved and added to a 99+ harness to make it function properly. Then you need a 0411 pcm with the proper fuel gauge settings enabled in order for the fuel gauge to work.
PM me if you have questions.

Mike454SS

iTrader: (4)

The 99 PCM isn't an 0411, but you can flash in the same code as an 0411, including the proper segment for the fuel gauge in a 98 to work.

If the 98 harness is not damaged, you can just re-pin the PCM connectors, and the 99+ PCM will plug right in.